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1Instructables44,907Views12CommentsJoined November 20th, 2017
Retired aerospace engineer with degree in Physics. Enjoy all things technical and like to hike in the Rockies.

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  • 3D Lenticular Printing Using Photoshop and Inkjet Printer

    It appears that the line width in pixels is 1/2 the resolution (720) divided by the lines per inch of your lenticular sheet (40). 720/40=18, 18/2=9 How you came up with line width should be explained.

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  • Add Wireless Charging to Any Phone: Using the LG-V20 As Example

    I would assume it would work, but you would need to insure that any connection via the USB port does not apply a second power source. If it did it could have a conflict with the hard wired source and damage one of the two sources. Most USB sources would provide power to the phone so I don't see why you would need to provide an additional hardwired power source.

    Sorry for late reply. I did not think of enamel coated wire. Really would have helped.As to efficiency: if you are worried about such a small waste then just buy an LED light to replace a regular incandescent and save "tons" more than wireless charging would waste. Keep in mind that electricity is wasteful in many ways (to generate, to transmit, to transform, etc). We use it for convenience not efficiency. I appreciate the concern. I will applaud the day that super capacitors replace batteries and we can buy a super capacitor car that gets 100 miles on a charge and takes only 5 minutes to recharge. That will be the day, but it will not be as efficient as a gas engine in the car. Again it is not about efficiency, it is about convenience and reduceing pollution.

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  • Add Wireless Charging to Any Phone: Using the LG-V20 As Example

    So you made the mod to your V20 or another phone?I haven't heard that anyone had done a similar mod due to my Instructable.

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  • Add Wireless Charging to Any Phone: Using the LG-V20 As Example

    In a wireless charging system you have a transmitter, a receiver and control circuitry for both. (See more below) Since each phone has a different battery then each phone contains their own battery charging and safety controls. Few are the same. However, for a source of power, for charging the phone, "all" phones use the USB port's standardized 5 VDC. Therefore, the QI ("Chee") standard wireless charging system can be designed to provide a single voltage of 5 VDC, since all phones use the same voltage. Any voltage higher or lower could cause the circuit to fail, or worse, set the phone on fire.If each phone required a different charging voltage then you would not have a standard and each phone would have their own chargers and connectors. This is the way laptop...

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    In a wireless charging system you have a transmitter, a receiver and control circuitry for both. (See more below) Since each phone has a different battery then each phone contains their own battery charging and safety controls. Few are the same. However, for a source of power, for charging the phone, "all" phones use the USB port's standardized 5 VDC. Therefore, the QI ("Chee") standard wireless charging system can be designed to provide a single voltage of 5 VDC, since all phones use the same voltage. Any voltage higher or lower could cause the circuit to fail, or worse, set the phone on fire.If each phone required a different charging voltage then you would not have a standard and each phone would have their own chargers and connectors. This is the way laptops are. There is not one standard voltage for all laptops to work off of, therefore, there are hundreds of different laptops power supplies with different voltages, power outputs and different plugs. By having all phones use the same USB plugs and their standard 5 VDC then you avoid all of the confusion and extra cost.The receiver coil in the picture is one half of a transformer. The other half is in the Transmitter or "Charging Plate". The QI control circuitry controls the transformers frequency and current to insure proper control of the 5 VDC.Hope this helps.

    AlanS14, you are right. USB GO (or USB OTG) is a communications standard extension of the USB standard. It does not impact the 5 VDC USB standard power or anything to do with charging the phone. The phone must have a wireless charging Receiver built in or you must do something like I did in this instructable. DO NOT ATTEMPT it if you are not comfortable with all the details.

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  • Add Wireless Charging to Any Phone: Using the LG-V20 As Example

    The receiver coil (aerial) had to be external on my phone since it has a metal back. Most (maybe all) phones have no room for the receiver coil inside. My Galaxy S3 would bulge with it inside and not lay flat. Your idea of leaving off the phone's back is interesting, but keep in mind that dirt can be bad for the phone. I carry my phone in my pocket and already have had to remove my cover to clean dirt off of the coil (aerial) near the on/off button. Dirt will contain conductive salts that could be fatal to the sensitive low voltage circuits.The receiver coil and electronics board is about 2 mm thick. I chose to use a single piece clear cover because 1) I can show off the shiny coils & 2) It does not add a lot of size (the V20 is big) and 3) it is flexible enough that the ph...

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    The receiver coil (aerial) had to be external on my phone since it has a metal back. Most (maybe all) phones have no room for the receiver coil inside. My Galaxy S3 would bulge with it inside and not lay flat. Your idea of leaving off the phone's back is interesting, but keep in mind that dirt can be bad for the phone. I carry my phone in my pocket and already have had to remove my cover to clean dirt off of the coil (aerial) near the on/off button. Dirt will contain conductive salts that could be fatal to the sensitive low voltage circuits.The receiver coil and electronics board is about 2 mm thick. I chose to use a single piece clear cover because 1) I can show off the shiny coils & 2) It does not add a lot of size (the V20 is big) and 3) it is flexible enough that the phone will lay flat because the receiver is essentially flat even though it bulges. On my Galaxy S3 it would spin on the bulge because the plastic back was not flexible enough to flatten out. Also, having read many phone reviews I decided that the two piece case I used before was probably no longer needed. However, if you are really concerned about your phones drop protection then I would suggest a case that has a rubber inner and hard outer shell. You can put the receiver coil on the back of the phone, (with the back on) and make room for it by cutting out a hole in the rubber inner case. The outer shell then will cover up the hole and hide the receiver. This means that the case only ads separation equal to the thickness of the outer shell. The receiver coil does not have charging circuits in it. It only generates the expected 5 volts needed for charging. Most batteries to day have 4 connections. A positive and a negative connection plus 2 others to sense temperature, etc. for charging control and safety. DO NOT connect the QI standardized receiver directly to the battery. BAD THINGS WILL HAPPEN. You must find a way to connect to the same circuit at the charging port uses and let the phones built-in charging circuit manage the charging process.As you consider all of the possibilities, remember that the charging coils (aerials) must be as close as possible and no more than maybe 5 mm apart and centered on each other.I hope this helps. There are many design criteria to keep in mind for any specific phone.

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    • Add Wireless Charging to Any Phone: Using the LG-V20 As Example
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  • Add Wireless Charging to Any Phone: Using the LG-V20 As Example

    I don't have a schematic of the charger or the phone. Sorry. I just made sure I had the right polarity. The reciever board was marked with a "+" & "-".

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  • Add Wireless Charging to Any Phone: Using the LG-V20 As Example

    How did the solder job work out. A picture of solder job and finished product would be nice. Glad you were able to do it!

    If you have had trouble with alignment it is probably due to too much separation. Anything over 3-4 mm will cause problems. I spend less time aligning my phone than I would messing with wires.And yes you can use it while charging. Of coarse a slanted charging platform would make it easier. The wireless charging is connected to the same wires in the phone as a corded charger.

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  • Add Wireless Charging to Any Phone: Using the LG-V20 As Example

    Personal preference, keep the port open for other uses and not wanting to mess with cords. And yes the Type-C is supposed to be more durable, but I question how durable any mechanical connection can be. I did not know of the Magnetic charging connectors that others have mentioned, however, I still like the idea of keeping the port open, though I have to admit it may not be of great value.As to a daughter board, there is not one. The port is soldered directly to the mother board and has over 24 solder points. There was another phone I considered (G5) for the very reason it had a daughter board, but disassembly was not as straight forward. IMO a phone that can be taken apart can be repaired even if dropped in water.Thank you for your comments. There is always a lot of choices to be ...

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    Personal preference, keep the port open for other uses and not wanting to mess with cords. And yes the Type-C is supposed to be more durable, but I question how durable any mechanical connection can be. I did not know of the Magnetic charging connectors that others have mentioned, however, I still like the idea of keeping the port open, though I have to admit it may not be of great value.As to a daughter board, there is not one. The port is soldered directly to the mother board and has over 24 solder points. There was another phone I considered (G5) for the very reason it had a daughter board, but disassembly was not as straight forward. IMO a phone that can be taken apart can be repaired even if dropped in water.Thank you for your comments. There is always a lot of choices to be made. The V20 was my choice. I noted when trying to find out how to add wireless charging that no one had published V20 specifics, so I decided I would.

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