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. …
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How to mount small hobby solar cells, plus a USB Solar power supply?
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 …
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Circuit Simulator