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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 subject circuit converts a PWM signal to a DC constant-current with good filtering of the PWM signal for such applications as driving laser diodes or LEDs.
This allows the current to be easily controlled by most microprocessor's PWM output.
It uses only one opamp and a transistor for both...
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