Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
The attached will provide from just below 4 mA to about 22 mA. It is simple and quick. I used a 2N2222 but any of several NPN simple transistors would work as well as any single supply basic op amp. The pot in the attached is set to about 50% of range. When possible I like to use a 10 turn pot. This should work as a quick simple temporary solution.
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