0-30v/0-60v dual power supply

Justin Roeder — Mon, 03 Apr 2023 16:48:35 +0000

Here’s a type of powersupply you should have. It’s good if you’re dealing with OP amps. I took the circuit from eleccircuit.com and modified it to incorporate 2x printer power supplies instead of an AC transformer. It provides a ground that are both positive and negative. LM317 and LM337 regulators are utilized in this circuit. They are the main components of the circuit. It uses 2 diodes and a 2.2k 2W resistor for each regulator’s adjustment to 0v. It has 3 diodes for each regulator to be used as its protection diodes like capacitors and short circuits. The two 5K potiometers adjust the output voltage at each output. Printer power supplies are perfect for this project since their voltages are not too high or low.

The project is built on a dick Tracy lunch box. With the printer power supplies inside with a c7 power cord splitter. It uses LM317 and LM337 to provide both positive and negative voltages. Here’s a joke: So I guess that means the LM317 and the LM337 are like the yin and yang of electronics!

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How to mount small hobby solar cells, plus a USB Solar power supply?

Justin Roeder — Thu, 24 Dec 2020 04:00:54 +0000

I looked all over the internet for a way to mount these solar cells, And only come up was ones you mount on houses. So I got a cardboard box and glue gun and tried gluing them to the piece of cardboard and it was a success! I got 19 of the 0.5v 0.8A solar cells from all electronics. They work great outside, I get around 11v. Inside there’s not enough current/voltage to run the panel meter. I got about 6v in the bathroom with it being really

All glued to the cardboard

I think for right now it doesn’t charge the phone correctly because I have the green and white wires on the USB Cord tied together. A friend told me that I need resistors on the data lines. So I looked online and came across this circuit and says it will tell the phone to draw only 500mA.

Circuit for changing

I will have to wait for the resistors to come in the mail to test it with the resistors. Down below is the pinout of the regulator I used. Just that and the 19 solar cells. Each solar cell is conneted in series(the same way batteries are connected).

The post How to mount small hobby solar cells, plus a USB Solar power supply? first appeared on Delphijustin industries.

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0-30v/0-60v dual power supply

How to mount small hobby solar cells, plus a USB Solar power supply?