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  • JohnC430 commented on ThomasVDD's instructable Reflow Soldering Hotplate2 months ago
    Reflow Soldering Hotplate

    Reclaimed steel is good. Just watch out for shorts to AC power.

    This is an excellent instructible. thanks for sharing.

    View Instructable »
  • JohnC430 commented on Dangerously Explosive's instructable Pro Tips for Using Cardboard2 months ago
    Pro Tips for Using Cardboard

    Thanks for sharing. Yes I did learn something from this so I voted :)

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  • JohnC430 commented on caitlinsdad's instructable Neopixel Light Up Sushi Serving Board2 months ago
    Neopixel Light Up Sushi Serving Board

    I had thought of this idea several times in the past and realized that having a color changing "serving platter" on the table while people are eating is fine for the first couple of minutes. after that it will become tiring to have something constantly changing color and brightness in front of everyone while they are chatting and eating... it may look good for a few minutes but after that it must be turned off... so then whats the use?

    Sounds good. I had another thought. to make it so that it lights up when someone reaches over to grab a piece. some kind of proximity sensor ???

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  • JohnC430 commented on Pricklysauce's instructable Branding Nails2 months ago
    Branding Nails

    Ohhh maaaannnnn!!! this is one of the coolest and most innovative ideas i have seen. i wondered how you would cut the patterns into the nail head. etching it did not come to mind. thanks for sharing.

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  • Power Your Soldering Iron With a Drill Battery!

    sorry to say this but your design is flawed and is unreliable even for your battery. you should not be selling stuff that does not work. if anybody really wants to use this then ask and i will give you the correct fix for the circuit.

    sorry to say this but your design is flawed and is unreliable even for your battery. you should not be selling stuff that does not work. if anybody really wants to use this then ask and i will give you the correct fix for the circuit.

    sorry ArnieO the post was meant for the author. somehow i cant delet the erroroneous post

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  • JohnC430 commented on diyperspective's instructable DIY "Floating" Night Lamp2 months ago
    DIY "Floating" Night Lamp

    no matter what, it is still a very nice creation.

    when I read the title I thought it really was a floating lamp and was visualizing all kinds of magnetic levitation approaches, and then how to light the lamp? with solar and batteries??? etc., etc. Small disappointment, but yeah, it still looks "floating" and the approach is much simpler. Thanks for sharing.

    Thanks. I did not mean that it was misleading, but yeah, you made it clearer. I am an electronics engineer and have made many weird devices so my imagination took off and started designing the moment I saw the title even before I read the article.

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  • JohnC430 commented on GreatScottLab's instructable DIY Digital Spirit Level3 months ago
    DIY Digital Spirit Level

    The IRLZ44N is an huge N-Channel transistor in a TO220 package. almost any N-Channel TO220 package transistor will do.

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  • 24v Grave Digger - Electronic Speed Controller (ESC) Upgrade

    https://www.ebay.com/itm/NEW-Box-of-80-Fullriver-LiFePO4-26650-3-2V-3300mAh-Rechargeable-Batteries/191987482937?hash=item2cb3588139:g:vj0AAOSwUYNaAcNpCheck this site.160 LiFePo43.3AH batteries for $160 plus shipping. Make your own battery pack. 8 batteries in series for 24 V. 20 in parallel. 20.5" x 10.2" x 10.2"This will make 64 Ampere-Hours at 24V with 200 Ampscapability.(10 Amps/battery)

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  • JohnC430 commented on israel09's instructable Basics of Concrete Finish Work3 months ago
    Basics of Concrete Finish Work

    yeah thanks. rub it in. feeling good now?

    Thanks for your post although it seems to be ignored. I had read about this before. Concretehardens under water although the initial mix must be made according to theinstructions. Once it seems to havecured even after a few hours it should be covered with wet burlap or somethingthat will hold moisture.

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  • JohnC430 commented on israel09's instructable Basics of Concrete Finish Work3 months ago
    Basics of Concrete Finish Work

    yeah. thanks. I copied your suggestion so I can follow it.

    Ohhh maaannnn!!!! why did you show the carpet. I thought you made on the carpet. I did everything like you described and my living room carpet is totally messed up. I can't even wash the concrete off from it and my wife now wants to have new carpet throughout the house. sheeesh!!!! I will wait for it to dry and try again. the carpet was totally soaked so I used some towels to soak up the water and cement. maybe when it is dry I can vacuum the concrete dust from the carpet(?)

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  • JohnC430 commented on bennelson's instructable Ammo Can Solar Power Supply3 months ago
    Ammo Can Solar Power Supply

    Ok Thanks. I also just looked at your schematic of the charge controller and noticed that the load is fed thru the CC. So it looks like the fuse is connected in the right place.

    sorry perhaps I did not make this clear... no need for the CC or the battery in this situation with LED's

    it is very simple. The solar panel (SP) is self limiting, i.e. it can only put out just so many amps and then the voltage goes down. for what u need u don't need a charge controller (CC). check the specs of the panel in this 'ible. it says the max voltage at peak power is 17.5 Volts and current at peak power is 0.86 Amps. I dont know what kind of LEDs ure going to use, however I will give u an example. Generally White LEDs need about 3 Volts. so 17.5/3=6 LEDs in series, and depending on the rating of the LED's they will give plenty of light with about 100mA. if ure just trying to decorate the yard then even 20 mA will do. so anyway, 0.86/0.1 = approx. 9 LED's in parallel. so 9x6=54 LEDs in one shot with the above example of the SP that he is using. just connect up and use them...

    see more »

    it is very simple. The solar panel (SP) is self limiting, i.e. it can only put out just so many amps and then the voltage goes down. for what u need u don't need a charge controller (CC). check the specs of the panel in this 'ible. it says the max voltage at peak power is 17.5 Volts and current at peak power is 0.86 Amps. I dont know what kind of LEDs ure going to use, however I will give u an example. Generally White LEDs need about 3 Volts. so 17.5/3=6 LEDs in series, and depending on the rating of the LED's they will give plenty of light with about 100mA. if ure just trying to decorate the yard then even 20 mA will do. so anyway, 0.86/0.1 = approx. 9 LED's in parallel. so 9x6=54 LEDs in one shot with the above example of the SP that he is using. just connect up and use them. What I cannot understand is that u want to use them when there is sunlight. what do u want to do with the LED lighting?

    I don't know how good you are at soldering. You can make this using the popular strings of LEDs which come in lengths of 1 meter or 5 meters. the LEDs are connected in sets of 3 in series, so u will have to cut two strings of 9 sets; i.e. two groups of 9 sets of 3 in parallel. then solder the strings in series. i.e. each set of three in one string must be soldered to the corresponding set in the second group. that's a lot of soldering. you would have to do this with any other sets of LEDs. Use #28 AWG wire. it is thin enough to do the soldering comfortably. Remember you will also need to strip the ends before soldering. so it does become a BIG job but as my grandmother used to say, patience is a virtue. Unfortunately I am not that virtuous...

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  • JohnC430 commented on bennelson's instructable Ammo Can Solar Power Supply3 months ago
    Ammo Can Solar Power Supply

    if the panel can supply just about 1 amp, then the 20 amp fuse will not be useful between the charger and the battery, because the charger can only supply maybe a max of about 1.2 Amps. the Battery going to the load can supply a very high current so that's where the fuse should be located. I don't know where you put the fuse so ... just adding my 2 bits here.

    There is no overall electrical diagram. It looks like the fuse is connected between the charger and the Battery. However you definitely need a fuse at input to the 12 VDCout. After all that's where you will be plugging in and out most of the time and where a short can occur.

    Very well made design. Thanks for sharing. I wrote a tip but will repeat it here just in case you miss it. There does not seem to be an overallelectrical diagram. It looks like the fuse is connected between the charger andthe Battery. However you definitely need a fuse between the Battery and the 12VDCout. After all that's where you will be plugging in and out most of the timeand where a short can occur.

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  • Live Edge River Table | Woodworking How-To

    A-MAAAAZZZZIIINNNGGGG PIECE OF ART! Thanks for sharing. You have great skills... woodworking, Metal working and Welding. That piece of wood is also amazing. where did you buy it and how much was it?

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  • JohnC430 commented on JON-A-TRON's instructable Off Grid Power Supply4 months ago
    Off Grid Power Supply

    No.. No.. No... I am not the creator of this device. the guy who made it is Jon-A-Tron. I have good knowledge of power electronics but not of all the other stuff like 3D Printing etc that was used to make this device. I only make simple devices which are all mainly electronics.

    LeonardK4 where are you located?

    it is a modified sine wave inverter. i went to the website and checked.Question:Is this a pure sine wave inverter or a modified sine wave inverter?Answer:Modified sine wave By Rick G on December 7, 2015

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  • JohnC430 commented on JON-A-TRON's instructable Off Grid Power Supply4 months ago
    Off Grid Power Supply

    as for your sisters set up she has a 100 W panel. i.e. 8 amps x 5.5 hrs = 44 AH; and she is using 2.25 amps x 24 hours = 54 AH; also in her case the refer is not puling 2.25 amps continuously. it turns off when the temp gets below the set point. assume 50% so she is running it at 54/2=27 AH which will allow the battery to stay charged. In fact the refer can theoretically run for 81% of the time and the battery will stay charged. "Do you rotate your panels to follow the sun to attain the highest efficiency of the panel? Do you turn your panels to other light sources during the night... like Street Lights." Does your sister have that kind of setup? people do not normally have a controller that is always pointing the panel to the sun. that would also take power... maybe...

    see more »

    as for your sisters set up she has a 100 W panel. i.e. 8 amps x 5.5 hrs = 44 AH; and she is using 2.25 amps x 24 hours = 54 AH; also in her case the refer is not puling 2.25 amps continuously. it turns off when the temp gets below the set point. assume 50% so she is running it at 54/2=27 AH which will allow the battery to stay charged. In fact the refer can theoretically run for 81% of the time and the battery will stay charged. "Do you rotate your panels to follow the sun to attain the highest efficiency of the panel? Do you turn your panels to other light sources during the night... like Street Lights." Does your sister have that kind of setup? people do not normally have a controller that is always pointing the panel to the sun. that would also take power... maybe not a lot but still, and the frame would have to be strong enough to withstand the winds. yeah... as for my remark about flip... not in good taste... should have said it better....

    apart from the AC-DC supply you need everything else if u go solar. to now it becomes a comparison of prices between the Solar panel and the AC-DC converter which is lower in price than the solar panel. the rest of the parts he has chosen are quality parts.so your remark that u can do it cheaper is incorrect, and certainly not "far less".

    youdid not calculate your load A-H before you bought it?"Iwould also lower the inverter wattage to 200/500 surge pure sine." why dothat? he already has the inverter... are u suggesting he throw away theinverter and buy another with smaller capacity?alsoyou are suggesting a 100 AH Battery... not only huge and heavy but also did youcalculate how he will charge it from a solar panel and how long it will take tocharge? The average sun day in So Cal is approx 5.62 hours. So you wantto charge that battery in one day and not in 10. So 100A-H/5.62 hours = 17.7 amps from the panelat 12V = 215 Watts. Now assuming that thecharge controller is 90% efficient. Thatpanel now 238 Watts and is about 3ftx4ft.it is easy to make flip remarks and give flip advice without calculating.

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  • MLAB | 3D PRINTED CROWN INSPIRED BY QUEEN RAMONDA

    nice crown. looks like it was inspired by the crown on the head of the "King" in the movie Madagascar. LOL.

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  • JohnC430 commented on bcb10's instructable ATTiny EMF Detector4 months ago
    ATTiny EMF Detector

    I reread the article and still dont understand what it does and how it works. also what is the intent of this? can anybody enlighten me? thanks.

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  • JohnC430 commented on tomatoskins's instructable Table Saw Disc Sander4 months ago
    Table Saw Disc Sander

    Thanks for the explanation and the calculation. i always wondered about these forces but never knew how to calculate them.

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  • JohnC430 commented on tomatoskins's instructable Hot Pipe Wood Bending4 months ago
    Hot Pipe Wood Bending

    thanks for the explanation

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  • JohnC430 commented on tomatoskins's instructable Hot Pipe Wood Bending4 months ago
    Hot Pipe Wood Bending

    what is the temp inside the steam box?

    Thanks for the response.you mean Degrees Fahrenheit. right? 212 F is boiling water... so i guess yeah Fahrenheit. I thought that you need a higher temp... like maybe steam at 300 F.

    do you know or can you make a guess to what temp the pipe gets? at what temp will the wood start bending. i am assuming that in order to generate steam if has to be over 100C but how much more? does anyone in these posts know?

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  • JohnC430 commented on Luk---'s instructable Air Purifier4 months ago
    Air Purifier

    Luk. you can use a simple light dimmer for speed control on the fan. i am assuming that the fan uses AC power and not DC power.

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  • JohnC430 commented on Rama Rekto's instructable DIY Self-Balancing One Wheel Vehicle4 months ago
    DIY Self-Balancing One Wheel Vehicle

    thats wonderful! in the electronic drawing you have a GYRO. where is that? i did not see it in the build plans.

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  • JohnC430 commented on lukeg22woo's instructable 50+ Mph E-Bike4 months ago
    50+ Mph E-Bike

    Here's the way it works. u plug the charger into the wall power outlet. yours is 240VAC so u need to buy a charger with an AC input of 240 Volts. the battery charger output is DC volts. this DC voltage must be high enough to fully charge your battery. he is using a "60V" battery which actually needs 67.2 Volts from the charger to fully charge the battery. so it is not exactly 60 Volts. Then it depends on how big a battery you are charging; i.e. how many amp hours. The Battery charger is also rated for amps... most simple car battery chargers are 12V and about 10 Amps or 20 Amps. So the next step is: what is your battery capacity? how many amp hours is it capable of? lets say 30 A-H battery. This is written on the battery. its like a bucket with a tap in the bottom. ...

    see more »

    Here's the way it works. u plug the charger into the wall power outlet. yours is 240VAC so u need to buy a charger with an AC input of 240 Volts. the battery charger output is DC volts. this DC voltage must be high enough to fully charge your battery. he is using a "60V" battery which actually needs 67.2 Volts from the charger to fully charge the battery. so it is not exactly 60 Volts. Then it depends on how big a battery you are charging; i.e. how many amp hours. The Battery charger is also rated for amps... most simple car battery chargers are 12V and about 10 Amps or 20 Amps. So the next step is: what is your battery capacity? how many amp hours is it capable of? lets say 30 A-H battery. This is written on the battery. its like a bucket with a tap in the bottom. u empty it out and then it takes time to fill it. that's the water u put in the bucket or the charge u put into the battery. it takes time to fill the battery to fully charge it. so if ure using a 10 Amp charger and a 30 Amp-Hour (A-H) battery u need at least 3 hours to charge the battery. actually due to internal chemical inefficiencies it takes about 20% more time to charge it. maybe 3.5 to 4 hours. a good battery charger will stop the charge when the battery is fully charged. This is a must.So there you have the full explanation. I hope it helps.

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  • JohnC430 commented on blorgggg's instructable Goophene: Hypersensitive Graphene Sensors 4 months ago
    Goophene: Hypersensitive Graphene Sensors

    it went off when u breathed into it but not as u were talking into the mic. Why?what is the frequency response of the amplifier connected to it?

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  • JohnC430 commented on tomatoskins's instructable Table Saw Disc Sander5 months ago
    Table Saw Disc Sander

    The grain of the wooden propeller is along its length. in this case, you will always have the centrifugal forces pulling the wood apart. The only way it could possibly work is with plywood which has layers so there is always something holding the grain together. Yeah maybe you can reduce the speed so the force is lower after all it is mV^2 so reducing the rpm by half (which will still allow it to work as a sander), will reduce the centrifugal force to 1/4th

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  • JohnC430 commented on tomatoskins's instructable Table Saw Disc Sander5 months ago
    Table Saw Disc Sander

    yeah true

    now why didnt anybody else say that. throughout reading these suggestions i was thinking the same thing. i suppose it may not be strong enough and can split apart and perhaps do some bodily damage? maybe plywood would work?

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  • JohnC430 commented on tomatoskins's instructable Table Saw Disc Sander5 months ago
    Table Saw Disc Sander

    no need to cut off the teeth. use it as is. just remember how it is made so u don't cut yourself.

    use ear plugs when u work.... just like u use an eye safety shield

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  • JohnC430 commented on TheNecromancer13's instructable Tubing Roller-Bender From Scratch5 months ago
    Tubing Roller-Bender From Scratch

    I saw your comment on a Solar Panelsystem and it looked quite professional; like it was written by an electrical engineer. Now I see one like it is written by a mechanicalengineer. I could respond to power electronics,but cannot make any comment on a mechanical structure like this one. You are a veryinteresting person. What is your background?

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  • JohnC430 commented on bennelson's instructable DIY Solar Garage5 months ago
    DIY Solar Garage

    How do you know they are not running off one clock and are syncd? Theoretically you are correct however, even given the % drifts that you suggested the differences in voltage at 240 Volts would be around 0.6V. Micro-inverters are designed with output inductors which are intended to equalize the voltages of all the micro inverters and the load does not see the differences in voltage.

    Could you build a system that supplied some large portion of your needs and separate those loads from the utility and then not worry about net metering? Would you still be taxed on that?

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  • JohnC430 commented on Proto G's instructable 1000W Portable Induction Heater5 months ago
    1000W Portable Induction Heater

    yes you can heat treat just the edge. you have to shape the "coil". this time it will be a narrow long "coil". length as the blade and instead of piping, make it 14AWG stiff enameled covered copper wire.the blade must fit in the "coil" so make the width of the coil just a little more for the blade to fit in it. This way the magnetic field will be focused on the saw blade. 1 or two turns of wire. if this is not clear ask the question again and I will explain how it works.

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  • JohnC430 commented on Proto G's instructable 1000W Portable Induction Heater5 months ago
    1000W Portable Induction Heater

    48V/20A on eBay for under $60. plus 1KW with the 6 resonant caps; induction heater for $30. these are about the lowest prices i have seen. of course you have to add all the wires and connectors so approx $100. then go blow yourself up or start a fire at home :):):)

    No sense dying when ure having fun... thats the best time to go. :):)

    what is the cost of a hacksaw blade?

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  • JohnC430 commented on Proto G's instructable 1000W Portable Induction Heater5 months ago
    1000W Portable Induction Heater

    look up schematic for induction heater on youtube. there are dozens of schematics

    so at no load it draws 350 Watts. thanks that was the info i wanted to know.This is supposed to be ZVS, i.e. no switching losses, so where is the 350 Watts going? I am surprised. all in the capacitors? do the caps get hot without a load?

    Ok I see your point and i agree with you. after all it is drawing power. what is the input current with nothing in the coil and high input voltage. At what voltage do you run the unit from the Variac? u you mentioned 4s = approx 14.4V from the batteries; is that the voltage at which you measured the 19.3 Amps? I thought the limit of the board is around 35 Amps. So the limit is about 20 Amps?

    look for "rectifiers" on YouTube

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