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.
Hello.
I want to power a laser pointer from a uC, a simple ON/OFF mechanism. But the output-PIN can only output or sink 20mA, while the laser requires 100mA. They both run on 5VDC.
My questions:
1: What do I do? I guess I can use a transistor (or maybe an op-amp?).
2: How will I...
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