author2
115Instructables612,402Views598CommentsIndonesiaJoined October 25th, 2014
Just an ordinary person who loves #thinking and #tinkering

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Survival Ready Contest
Contest Winner Second Prize in the Survival Ready Contest
Pocket-Sized Contest
Contest Winner Second Prize in the Pocket-Sized Contest
Puzzles Challenge
Contest Winner Runner Up in the Puzzles Challenge
Automation Contest 2016
Contest Winner Runner Up in the Automation Contest 2016
PVC Contest 2017
Contest Winner Second Prize in the PVC Contest 2017
Puzzle Challenge
Contest Winner Second Prize in the Puzzle Challenge
Flat Pack Contest
Contest Winner Runner Up in the Flat Pack Contest
Wizarding Contest
Contest Winner First Prize in the Wizarding Contest
Sci-Fi Contest 2016
Contest Winner Runner Up in the Sci-Fi Contest 2016
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  • chienline commented on chienline's instructable Arduino Battery Voltage Indicator1 day ago
    Arduino Battery Voltage Indicator

    Yes it is. There was about 0.1 volt difference compared to (my) multimeter but it had stable result on several tests. Then I could simply reduce 0.1V in the code, but I left it as is. If you want higher accuracy, collect test data to count average voltage lost in the measurement and adjust the calculation in the code (like simply reduce the result with 0.1V) to get the same result with your multimeter.

    View Instructable »
  • chienline commented on chienline's instructable Arduino Battery Voltage Indicator5 weeks ago
    Arduino Battery Voltage Indicator

    Thank you. Recording the time and voltage can be done in the sketch, but you need to add SD card module (check it here). The internal rom has limited space and also limited write cycles. You can learn about that in Arduino official web.

    View Instructable »
  • Lacing Bike Wheel : 36 Holes Hub to 32 Holes Rim

    Normal riding, no issue so far ^_^I think only 4 spokes out of 36 will bring little to no effect on normal riding. If you go extreme sport, well, better pick appropriate gears for that purpose :D

    You have such a big hub, then yes you need shorter spokes. It's been four months and I guess you have figured it out or get a new 36 holes rim :DAnyway, experimenting is fun and my bike still serves me a good ride until now :)

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  • Get Your ESP8266-12 Ready for AT Commands

    You are welcome ^^

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  • chienline commented on chienline's instructable NUT-T Coin Trap6 weeks ago
    NUT-T Coin Trap

    Nice to meet you ^_^Mengapa kamu memilih Bahasa Indonesia di antara bahasa lainnya? You must have special purpose for that, right? Travelling, communication with Indonesian gamers, or be an English teacher in Indonesia, private courses with native speakers do increase our communication skill faster so you can pick a student who wants to learn English and you can learn Bahasa Indonesia from him/her at the same time :DBut better not, I imagine that both of you will end up with Singlish (Singaporean English) when you mix Bahasa and English xDSaya senang mendengar kamu suka Bahasa Indonesia dan ingin mempelajarinya. Saya belajar English karena saya suka komputer sejak kecil (jaman IBM dan DOS muncul sebagai personal computer) dan komputer menggunakan English, maka saya mempelajarinya ^_^ Hi...

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    Nice to meet you ^_^Mengapa kamu memilih Bahasa Indonesia di antara bahasa lainnya? You must have special purpose for that, right? Travelling, communication with Indonesian gamers, or be an English teacher in Indonesia, private courses with native speakers do increase our communication skill faster so you can pick a student who wants to learn English and you can learn Bahasa Indonesia from him/her at the same time :DBut better not, I imagine that both of you will end up with Singlish (Singaporean English) when you mix Bahasa and English xDSaya senang mendengar kamu suka Bahasa Indonesia dan ingin mempelajarinya. Saya belajar English karena saya suka komputer sejak kecil (jaman IBM dan DOS muncul sebagai personal computer) dan komputer menggunakan English, maka saya mempelajarinya ^_^ Hingga saat ini masih banyak vocabulary yang saya tidak tahu, tetapi ketika membaca sebuah kalimat saya dapat menebak artinya, dan terima kasih kepada Google saat ini setiap orang memiliki kamus di dalam genggaman :)Note : Simply visit https://translate.google.com and copy-paste the text above to learn Bahasa Indonesia or any other languages ^_^

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  • chienline followed Atag the coolest6 weeks ago
  • Driving Bi-Polar Stepper Motor With Keyes L298N

    Awesome project it must be. This was few years back and I need to refresh :D Well, as far as I can imagine your submarine need stepper motor to open/close torpedo launcher, or open/close a door to intake water to sink or float. If let us say you want it for the propellers to move forward or backward, I suggest you to use DC motor instead of stepper motor.Then you said about two button to be operated remotely while at the end it is controlled by cable from mothership.If it is operated by cable, then it will be simpler. Two "buttons" is placed on the mothership. Check out the Arduino button tutorial, and don't forget the 10K pull-down resistors. When the button is pressed (put digitalRead() in void loop() to keep checking if the buttons are pressed) just called the forward() or ...

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    Awesome project it must be. This was few years back and I need to refresh :D Well, as far as I can imagine your submarine need stepper motor to open/close torpedo launcher, or open/close a door to intake water to sink or float. If let us say you want it for the propellers to move forward or backward, I suggest you to use DC motor instead of stepper motor.Then you said about two button to be operated remotely while at the end it is controlled by cable from mothership.If it is operated by cable, then it will be simpler. Two "buttons" is placed on the mothership. Check out the Arduino button tutorial, and don't forget the 10K pull-down resistors. When the button is pressed (put digitalRead() in void loop() to keep checking if the buttons are pressed) just called the forward() or reverse() function with the step and speed parameters set.If it is operated wirelessly, then you need to learn how to send "button pressed signal" through bluetooth or wifi. The setup is more or less the same, just adding bluetooth modules on both your submarine and mothership. You can check about bluetooth module on my panzer project on step 3.Sorry, I can't provide you the exact working code due to my limited time for now I have working full time :)But I can direct you at my best to help. All you need is keep searching for we now have the powerful Mr.Google at our fingertips ;)

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  • chienline commented on chienline's instructable NUT-T Coin Trap7 weeks ago
    NUT-T Coin Trap

    I have added an extra step for .STL files and also extra level for the puzzle. It should be plug-n-play (depends on quality of print) :DI hope you (and many others) enjoy it ;)

    View Instructable »
  • chienline's entry NUT-T Coin Trap is a winner in the Puzzle Challenge contest 2 months ago
  • chienline commented on chienline's instructable NUT-T Coin Trap2 months ago
    NUT-T Coin Trap

    Not yet finalize and found out that I missed "chopstick track" on top board but with only single track at "bottom board" is working just fine so I cut off the "chopstick" that is facing the "top board".Then I learned from 3D Printing Service crews that we need to flush out 0.2 mm for "fit in dowels", and 0.4 mm to 0.5 mm for swivel or moving parts along a track. I will rebuild new .STL files based on these informations and what I found on my first build ;)Then I will add an additional step on my instructable for sure.

    It's working after some cutting and filing. Christmas will be more fun with this toy around :D

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  • chienline made the instructable NUT-T Coin Trap2 months ago
    NUT-T Coin Trap

    I have built a credit card size (smaller version) on Tinkercad replacing the bolts and nuts with plastics and have it printed at local 3D printing service.My first 3D project and still need filing and fitting. I will update my .STL files later for plug and play pieces ;)

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  • chienline commented on chienline's instructable NUT-T Coin Trap2 months ago
    NUT-T Coin Trap

    Thank you. Now everyone of us has all kinds of dictionary in our pockets, don't we? Saya belajar Bahasa Inggris namun saya tidak jadi sekolah di luar negri (karena situasi pada saat itu tidak memungkinkan). Maka menulis di Instructables.com menjadi salah satu media bagi saya untuk terus belajar grammar dan juga belajar bersama-sama dengan anak saya :DI read that Manado has many great places to visit too. Bunaken is spectacular. I hope I can visit there one day :)

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  • chienline commented on chienline's instructable NUT-T Coin Trap2 months ago
    NUT-T Coin Trap

    Good eyes. Yes, I am ^^Salam dari Tebing Tinggi, Sumatra Utara.Thank you. You write great ibles too :)

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  • chienline followed Mastering Me2 months ago
      • 3D Printed: Star Trek Classic Phaser
      • 3D Printed Optical Illusion: Penrose Steps
      • Easy, Delicious Super Bowl Black Bean Salsa
  • chienline's entry NUT-T Coin Trap is a finalist in the Puzzle Challenge contest 2 months ago
  • chienline commented on Penolopy Bulnick's instructable Floating Snowflake Ornament2 months ago
    Floating Snowflake Ornament

    Awesome build and awesome information. I put Creality CR10 in my wishlist and now I should consider Prusa products :D

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  • chienline commented on seamster's forum topic What's on your tool wish-list?2 months ago

    A 3D printer. Most of the time I can imagine a shape to fix something or to make a device better or a completely new design for life hacks and a 3D printer is the only tool that can bring my imagination alive. For now, I always seek in trashes for things to be used.3D printer is getting cheaper and better so maybe I'm going to get one in early 2019 ^_^

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  • Bad Ideas: the Ultimate Office Puzzle Game

    These are great games indeed.Single simple design with multiple rules ^_^Love it!

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  • chienline commented on chienline's instructable NUT-T Coin Trap2 months ago
    NUT-T Coin Trap

    As I said, my measurement changes in the making process, but the mechanism stays as is. Nut track on bottom board is cut half way down the bottom board. The nut container on middle board should fit the nut completely that means at least 4-5 mm, so that it can escape the nut track.Chopstick track is also cut half way down for both bottom board and top board. The chopstick length itself can be adjusted to fit in its track.Feel free to ask anything you want to know and I will assist at my best. Since this project is fresh in my head and fun ^_^

    Ups! I didn't mention the thickness yes. My bad. I use 5 mm for bottom and top, and 8 mm for middleA 10 mm nut has 4 mm thickness, so pick any plywood that can hide it in. I am thinking of 4 layers of 4-5 mm plywood will do. You can use 2 layers for middle boards.

    Thank you @christine828 for pointing it out to @thehoss. Mine has the size of 10 cm x 8 cm, it is a little bit larger than credit card size.I am trying to make one smaller than credit card, but of course I have to recalculate the nuts and bolts positions, or maybe I'll switch them with pieces of wood to make it smaller ^_^

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  • chienline's instructable NUT-T Coin Trap's weekly stats: 2 months ago
    • NUT-T Coin Trap
      5,587 views
      48 favorites
      15 comments
  • chienline commented on chienline's instructable NUT-T Coin Trap2 months ago
    NUT-T Coin Trap

    Unfortunately I had given it to my Brother on Dec 1, er, Dec 2 actually (that was plan B), so no video I can provide until I make another one :DI try to answer your question:* Coin Trap Puzzle means you put a coin in a container (not only a wooden box like mine but it can also a metal box, a cube shape, wood pieces with metal bars, any kind of container that can hold a coin and there is/are certain way(s) to get the coin out of the container. * NUT-T Coin Trap has two pairs of bolt-nut in it which are placed carefully to lock the inner piece of wooden container. The GOAL is getting the coin out from the coin hole (the large hole). How can you keep the top bolt up and the bottom bolt down to get the coin out. Remember there is also a nut blocking at the backside :)I will post a solving s...

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    Unfortunately I had given it to my Brother on Dec 1, er, Dec 2 actually (that was plan B), so no video I can provide until I make another one :DI try to answer your question:* Coin Trap Puzzle means you put a coin in a container (not only a wooden box like mine but it can also a metal box, a cube shape, wood pieces with metal bars, any kind of container that can hold a coin and there is/are certain way(s) to get the coin out of the container. * NUT-T Coin Trap has two pairs of bolt-nut in it which are placed carefully to lock the inner piece of wooden container. The GOAL is getting the coin out from the coin hole (the large hole). How can you keep the top bolt up and the bottom bolt down to get the coin out. Remember there is also a nut blocking at the backside :)I will post a solving steps if requested :DNote : For those who own 3D printers, this design can be printed too. Change the bolts and nuts with plastics and make it smaller in size :)

    Yes. It is fun to make and play :)Can't wait to see your post on "I Made It!"

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  • chienline commented on chienline's instructable NUT-T Coin Trap2 months ago
    NUT-T Coin Trap

    Thank you. Glad that you like it ^_^

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  • Lacing Bike Wheel : 36 Holes Hub to 32 Holes Rim

    Ups. I didn't shoot any vid on that project and ofcourse I am not going to redo 😅But if you follow my instructables step by step, I belive you can do it. Just neet to read slowly and let the photos be your guide.

    Ups. I didn't shoot any vid on that project and ofcourse I am not going to redo.But if you follow my instructables step by step, I belive you can do it. Just neet to read slowly and let the photos be your guide :)

    Ups. I didn't shoot any vid on that project and ofcourse I am not going to redo 😅But if you follow my instructables step by step, I belive you can do it. Just neet to read slowly and let the photos be your guide 😁

    View Instructable »
  • chienline commented on chienline's instructable NUT-T Coin Trap2 months ago
    NUT-T Coin Trap

    Thank you ^_^

    Thank you. Glad that you love it. I enjoy the making process and see people struggle to solve it :D

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  • chienline commented on chienline's instructable Blow OFF the LED2 months ago
    Blow OFF the LED

    That means you are at noisy environment and the mic hears sound all the time. Try to adjust its sensitivity by lowering or increasing the resistor value, the resistor that connect mic positive post to 5V. Or simply replacing it with another 10K resistor :)

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  • chienline entered NUT-T Coin Trap in the Puzzle Challenge contest 2 months ago
  • chienline commented on chienline's instructable Blow OFF the LED2 months ago
    Blow OFF the LED

    It is difficult to check base on the image. But my best answer is, try using serial monitor to see if the microphone hears any sound.Add on the sketch :1. Below the line: void setup() { Add : Serial.begin(9600);2. Below the line: if (analogRead(A0) > micValue){ //Check the microphone state Add : Serial.println(analogRead(A0)); delay(500);Open your serial monitor to see the value read by the mic.If there is no changes in the value, that means the mic hears nothing. Then you need to re-wired all the components or check if any of them is broken.

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    • From Light Bulb to Arduino (Microcontroller Getting Started)
      267 views
      4 favorites
      0 comments
  • chienline commented on Natalina's instructable Frankenbot Papercraft3 months ago
    Frankenbot Papercraft

    You're welcome ^^Just enjoy the fun time.

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  • Lacing Bike Wheel : 36 Holes Hub to 32 Holes Rim

    It's okay to use spoke length calculator, but I didn't because I couldn't find different sizes of spoke other than the universal 10.5” in town. I have double wall rims that saved me from the exceeded length of some spokes ^_^

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  • chienline commented on chienline's instructable Arduino Battery Voltage Indicator3 months ago
    Arduino Battery Voltage Indicator

    Ah.. you are right about the resistors. Those were 2% tolerance resistors anyway.Thanks for pointing this out.

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  • chienline made the instructable Frankenbot Papercraft3 months ago
    Frankenbot Papercraft

    Frankenbot : You are Rock! (with sunglasses)Popcorn : No! Absolutely POP (corn)Dracobot : That's all Folks!

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  • chienline made the instructable Frankenbot Papercraft3 months ago
    Frankenbot Papercraft

    🤖 You are Rock! (with sunglasses)🍿 No! Absolutely POP (corn)🧛🏻‍♂️ That's all Folks!

    View Instructable »
  • chienline made the instructable Frankenbot Papercraft3 months ago
    Frankenbot Papercraft

    🤖 You are Rock! (with sunglasses)🍿 No! Absolutely POP [corn]🧛🏻‍♂️ That's all Folks!

    View Instructable »
  • chienline commented on WickedMakers's instructable Zebrawood and Brass Dice Tower4 months ago
    Zebrawood and Brass Dice Tower

    Awesome! Love it. I love the way you use dowels to scramble instead of multiple ramps. And also love the sign post very much. Good job.

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  • chienline followed WickedMakers4 months ago
      • Zebrawood and Brass Dice Tower
      • Easy Halloween Cemetery Fence
      • Ultimate DIY Fog Chiller
  • Lacing Bike Wheel : 36 Holes Hub to 32 Holes Rim

    You may need some shorter spokes if they are available in the market. In my case, I have double walls rims that protect the inner tubes from the excessive spokes inside the rims

    You are welcome. Have the best luck with your rims ^_^

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  • chienline commented on chienline's instructable Replacing Old Flashlight Bulb With LED5 months ago
    Replacing Old Flashlight Bulb With LED

    Thank you for enlightening me. Then I guess I need an 1-ohm resistor in this case to keep its brightness? :D

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  • Lacing Bike Wheel : 36 Holes Hub to 32 Holes Rim

    Ah.. it has been two years. Time flies.I am still riding this bike today. No issue so far, but of course normal riding, speeding sometimes, but no jumping acrobatics of course. Only jumping off/to sidewalk or few half feet stairs 😁No problem at all. Not a single issue with my bike 😄

    Ah.. it has been two years. Time flies.I am still riding this bike today. No issue so far, but of course normal riding, speeding sometimes, but no jumping acrobatics of course. Only jumping off/to sidewalk or few half feet stairs 😁No problem at all. Not a single issue with my bike 😄

    Ah.. it has been two years. Time flies.I am still riding this bike today. No issue so far, but of course normal riding, speeding sometimes, but no jumping acrobatics of course. Only jumping off/to sidewalk or few half feet stairs.No problem at all. Not a single issue with my bike.

    Ah.. it has been two years. Time flies.I am still riding this bike today. No issue so far, but of course normal riding, speeding sometimes, but no jumping acrobatics of course. Only jumping off/to sidewalk or few half feet stairs 😁No problem at all. Not a single issue with my bike 😄

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  • chienline commented on chienline's instructable Magnum IDs and Stand6 months ago
  • chienline's instructable Magnum IDs and Stand's weekly stats: 6 months ago
    • Magnum IDs and Stand
      802 views
      4 favorites
      5 comments
  • chienline commented on chienline's instructable Nunchaku - Skipping Rope6 months ago
    Nunchaku - Skipping Rope

    Wow.. that's cool one similar to this. To make it auto retract we need kind like motor triggered by a button. You can start a new instructable for that then ;)I love to see your build :)

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  • chienline commented on chienline's instructable Magnum IDs and Stand6 months ago
    Magnum IDs and Stand

    Last time I rubbed too hard to remove the white spaces of paper. Now, I tweak the printout, filling the background with wood/sand color. Then I only need a light scrub to remove thin layer of paper. It is getting better and better now.

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  • chienline commented on SimonRob's instructable Bi-color 5mm Led Ring (DIY)6 months ago
    Bi-color 5mm Led Ring (DIY)

    To indicate button pressed and released.To indicate battery low and full.To indicate charging or discharging.To indicate state of processing and done.Many ways we can use a bi-color LED and this LED-AND-RING-LED is cool!

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  • chienline commented on chienline's instructable Magnum IDs and Stand6 months ago
    Magnum IDs and Stand

    Last time I rubbed too hard because I want to remove the white space and the code became messy. Now I do a trick that is splashing the white with wood/sand color before printout, so the QR Code looks like printed on the sticks 😄 and it is working.

    Last time I rubbed too hard because I want to remove the white space and the code became messy. Now I do a trick that is splashing the white with wood/sand color before printout, so the QR Code looks like printed on the sticks 😄 and it is working ...

    Last time I rubbed too hard because I want to remove the white space and the code became messy. Now I do a trick that is splashing the white with wood/sand color before printout, so the QR Code looks like printed on the sticks 😄 and it is working.

    Last time I rubbed too hard because I want to remove the white space and the code became messy. Now I do a trick that is splashing the white with wood/sand color before printout, so the QR Code looks like printed on the sticks 😄 and it is working.

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  • chienline commented on chienline's instructable Magnum IDs and Stand6 months ago
    Magnum IDs and Stand

    Thank you. Sure you do ;)

    Just like when the kids asking me for a set of those sticks. Then we go party... :D

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  • chienline entered Magnum IDs and Stand in the Creative Misuse Contest contest 6 months ago
  • chienline's instructable Multi-tool Value Added Features's weekly stats: 7 months ago
    • Multi-tool Value Added Features
      728 views
      5 favorites
      2 comments
  • chienline commented on chienline's instructable Multi-tool Value Added Features7 months ago
    Multi-tool Value Added Features

    Yes, once you own a Leatherman, its durability will stand for lifetime. They give the best 25-year guarantee.But if you have extra money, $60 Skeletool (by now) is a good deal for minimalist yet stylish.

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  • chienline followed jollifactory7 months ago
      • JF Time Fountain
      • IKEA Frame Hack > SLOMO (Slow Motion) Frame
      • JolliCube Audio/Music Visualizer
  • chienline completed the lesson Composition in the class Photography Class7 months ago
  • chienline commented on chienline's instructable Arduino Battery Voltage Indicator7 months ago
    Arduino Battery Voltage Indicator

    You can define it as long because we don't care about millisecond (decimal). You can define it in printVolt() or make it global if you want to use it outside printVolt()^_^

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  • chienline commented on chienline's instructable Arduino Battery Voltage Indicator7 months ago
    Arduino Battery Voltage Indicator

    The positive post of battery (+) should go to Vin, not 5V. Two resistors are good for 9V.Thanks for the information using Proteus Simulator. I shall try it too ^_^

    If it is a standalone power source, then you should measure the voltage when it is fully charged and also when it dies (your project stop working/not working properly). The formula remain the same :OnePercent = (FullyCharged - BatteryDies) / 100;BatteryPercentage = (ReadVoltage - BatteryDies) / OnePercent;The sketch above reads the battery voltage continuously. If you want to read every 10 seconds, the simplest way is adding delay(10000); in loop section rather than complicated but more accurate timer implementation.You know about millis() then I assume you know how to write simple Arduino sketch just like me ^_^ then I can simply explain the algorithm I guess, because it needs testing phase to write working sketch and I think I don't have that time by now :DFor rough estimate remaining...

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    If it is a standalone power source, then you should measure the voltage when it is fully charged and also when it dies (your project stop working/not working properly). The formula remain the same :OnePercent = (FullyCharged - BatteryDies) / 100;BatteryPercentage = (ReadVoltage - BatteryDies) / OnePercent;The sketch above reads the battery voltage continuously. If you want to read every 10 seconds, the simplest way is adding delay(10000); in loop section rather than complicated but more accurate timer implementation.You know about millis() then I assume you know how to write simple Arduino sketch just like me ^_^ then I can simply explain the algorithm I guess, because it needs testing phase to write working sketch and I think I don't have that time by now :DFor rough estimate remaining time you can add another parameter storing how long it spends 1 percent of the battery.int TimeForOnePercent = 0;float PrevPercentage = 0;Put this variable out of any procedure or function. Make it global. Then add this to printVolts() function after float voltage = ... :if (PrevPercentage == 0){ // first time reading. PrevPercentage = Battery Percentage;}else if (PrevPercentage == BatteryPercentage){ // battery has not dropped, add another 10 seconds to record. TimeForOnePercent += 10; }else if (PrevPercentage - BatteryPercentage == 1.00){ // battery drops 1%, time to count the estimate remaining time. TimeForOnePercent += 10; // 10 secs has passed, we still need to add this. // EstimateRemainingTime is in second, you can convert it to hour and minute EstimateRemainingTime = Percentage * TimeForOnePercent; // Reset the PrevPercentage PrevPercentage = Battery Percentage;}Again you should recalibrate your BatteryDies time. Currently we are talking about car's battery that condidered dies at 11.9V but for other project it may die at any level depends on your project.

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  • chienline commented on chienline's instructable Arduino Battery Voltage Indicator7 months ago
    Arduino Battery Voltage Indicator

    So you are going to measure your car's battery voltage. I won't say this device doesn't work but I will explain further regarding car's battery. Let's pick a normal family car or SUV which is rated 12V. It is fully charged at around 12.7V. When the engine is running you will get 13.7V - 14.7V, that is the output of the car's alternator.When your battery dies? When it reaches 11.9V, but this is not telling you about time to replace your battery. You may still charge it with external charger to working voltages, or you may not, there are a lot of possibilities regarding to car's battery such as abnormal discharging.The range of working voltage of a car battery is 11.9V to 12.7V, so you can calculate it like this :100% = 12.7 - 11.9 = 0.8V1% = 0.8 / 100 = 0.008VBattery percentage = (ReadVo...

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    So you are going to measure your car's battery voltage. I won't say this device doesn't work but I will explain further regarding car's battery. Let's pick a normal family car or SUV which is rated 12V. It is fully charged at around 12.7V. When the engine is running you will get 13.7V - 14.7V, that is the output of the car's alternator.When your battery dies? When it reaches 11.9V, but this is not telling you about time to replace your battery. You may still charge it with external charger to working voltages, or you may not, there are a lot of possibilities regarding to car's battery such as abnormal discharging.The range of working voltage of a car battery is 11.9V to 12.7V, so you can calculate it like this :100% = 12.7 - 11.9 = 0.8V1% = 0.8 / 100 = 0.008VBattery percentage = (ReadVoltage - 11.9) / 0.008Assuming ReadVoltage = 12.4VBattery percentage = (12.4 - 11.9) / 0.008 = 62.5%Again, this is not telling you whether you can start your engine or not. Starting up a car needs a lot of amp, not voltage. Checking on the voltage regularly can give you a rough condition of your car's battery and help you in diagnosing a battery problem like if something in the car is discharging your battery when the engine is off.In certain case you can jump start your car and let it run for 20 mins to charge the battery and if the battery is still good (it can store charges) then no replacement is needed. Someone may have leave the key in ACC and every electronic in the car is discharging the battery. That happens to old car. New family car will warn you with "beeps" when your your key is plugged, the engine is off and the driver's door is open (meaning the driver is leaving the car without the key).

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  • chienline commented on chienline's instructable Arduino Battery Voltage Indicator8 months ago
    Arduino Battery Voltage Indicator

    This project do the same purpose to me. I wanted to know if my battery can run my RC toy should I charge it before playing.Let us say my RC needs at least 6V to run its Arduino and motors and every modules in it. I am using a 7.4V battery that is fully charged to 8.4V. Do some math here :8.4 - 6 = 2.4 (this is 100%)2.4 / 100 = 0.024 (this is 1%)then we can set in the code :BatteryLife = 100 - ((8.4 - voltage ) / 2.4 * 100)Now you got your BatteryLife in percentage before your device stop working.

    All you need is a DC-DC voltage step down module that cost $1 or less. Try to set it up as the picture below. Now your Arduino is powered by the same battery but with acceptable voltage.If your battery is fully charged at around 18 volts then A0 will read 4.5 volts. You change the code :float voltage = sensorValue * (5.00 / 1023.00) * 2;to float voltage = sensorValue * (5.00 / 1023.00) * 4;because you have divided the voltage into four equals-- that is 4.5V read by your Arduino through A0 pin, then you need to calculate back to get the real voltage that is 18V.

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  • chienline commented on chienline's instructable Arduino Battery Voltage Indicator8 months ago
    Arduino Battery Voltage Indicator

    Do not feed 15V to your Arduino Vin. Arduino can only take up to 12V and its I/O pin can only take up to 5V.Use a voltage regulator for your Arduino (convert your 15V to 5V) and use voltage divider (4 resistors needed because your 15V could be fully charged up to 18V) before A0 pin because we need to read the real voltage.

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  • Get Your ESP8266-12 Ready for AT Commands

    You are welcome ^_^

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  • chienline commented on chienline's instructable Arduino Battery Voltage Indicator9 months ago
    Arduino Battery Voltage Indicator

    This is it, isn't it? :D

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  • Get Your ESP8266-12 Ready for AT Commands

    Have you tried Step #2 ? Wiring the ESP-12 with 10K resistors as pull-up or pull-down. I did need those resistors to make it work as far as I can remember.

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  • chienline's entry Card Holder With Ejector is a winner in the Pocket-Sized Contest contest 9 months ago
  • Get Your ESP8266-12 Ready for AT Commands

    What kind of flashtool are you using? Take a look at Step#5 above :)That was a reset trigger by reset pin just like what I had at Step#4. So you should move to Step#5, download a more advanced flash tool. Should be a newer version of that tool by now :)

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  • Get Your ESP8266-12 Ready for AT Commands

    Try to decrease the BaudRate step by step down to 9600 and see which one works ;)

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  • chienline commented on chienline's instructable How to Win Prizes at Instructables9 months ago
    How to Win Prizes at Instructables

    Pssstt!! Now they might send you a gift pack or something maybe when your Instructable got included in their weekly newsletter or when they just thought you deserved it. I think this is a new way of rewarding replacing the 4-featured in a month. So, keep making things, keep writing, and you will get a surprising message in your inbox ;)

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  • chienline followed AlvaroMaker9 months ago
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  • chienline commented on chienline's instructable Card Holder With Ejector9 months ago
    Card Holder With Ejector

    Thank you. Just curious how it works, then I made it.... my way ^_^

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  • chienline's entry Card Holder With Ejector is a finalist in the Pocket-Sized Contest contest 9 months ago
  • chienline commented on chienline's instructable How to Win Prizes at Instructables10 months ago
    How to Win Prizes at Instructables

    You joined Instructables about six months ago and you have written so many featured instructables. That is "Awesome!". You are doing good. You are already a winner here. Okay, I'll try to explain a lil' bit.The love sign (read Favorite) is a little different from Instagram's love or Facebook's like. Some users use it the same way as Instagram or Facebook, but I (and I believe some people out there) use it more like a bookmark. Things I think they are "cool" or "useful", I will put them in my favorite list as a collection. When I forget the title and want to make it one day, I will search in my favorite list rather than the whole Instructable database. So I won't put so many favorites in the list or it will be hard to find one.The comment. Mostly people with...

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    You joined Instructables about six months ago and you have written so many featured instructables. That is "Awesome!". You are doing good. You are already a winner here. Okay, I'll try to explain a lil' bit.The love sign (read Favorite) is a little different from Instagram's love or Facebook's like. Some users use it the same way as Instagram or Facebook, but I (and I believe some people out there) use it more like a bookmark. Things I think they are "cool" or "useful", I will put them in my favorite list as a collection. When I forget the title and want to make it one day, I will search in my favorite list rather than the whole Instructable database. So I won't put so many favorites in the list or it will be hard to find one.The comment. Mostly people with the same interests will comment, or people having trouble in following the instruction will ask. Growing followers needs time. Keep learning and writing good instructables will make it happen. You can join classes to expand your skill in other topics. Step 5 : share your work on social media will increase your views and maybe followers and comments.The view. The more the better. It means people read your instructables. Either only the introduction or the whole steps, they like it or not, it doesn't matter. Some people will find it useful, unique, awesome, and if they run a website somewhere out there, they might share your instructables on their sites or Pinterest or somewhere else. Believe me. You will notice this kind of thing happens when you search your "title" at Google and see that some DIY sites are sharing your instructables.Keep making, keep sharing, believe me there are a lot of Moms out there just about following you -- the winner with three trophies by now. ;)Don't worry about the views, comments, or faves. Keep collecting the complete colors of Robot tee shirt :D

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