this post was submitted on 18 Jun 2023
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How to properly size a serial bulb for protection when troubleshooting a circuit? (discuss.tchncs.de)
submitted 1 year ago by [email protected] to c/[email protected]
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Hello. I'm a hobbist on electronics repairs, and I did some repairs on stuff powered from the wall socket before, using a serial bulb to protect the circuit in case there's a short. Now I want to troubleshoot a board that works at 3V and very low current (like no more than 100mA). So, how can I properly size the bulb I need for this circuit before powering it? Or is there a better way to protect the circuit than a serial bulb? Thanks in advance.

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[–] Krististrasza 1 points 1 year ago

That's for mains-powered devices. It will do nothing at 3V.