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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 common LM317 regulator can be configured as a constant-current (CC) or constant-voltage (CV) circuit. Both are often desired for such applications as battery charging.
Here is a circuit that does that with one LM317 and one TL431 programmable reference IC.
One common way in the literature...
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