We’re rounding the corner with testing our Sparkle Motion WLED-compatible board. This time, we’re doing the fuse test. we got a lot of requests to include a 5A fuse onboard. Of course, we need to verify that it works as expected. With a chonky 12V 25A power supply and my trusty electronic load, we dial up one amp at a time… note that all PTC fuses have a ‘hold’ of 5A and a higher trip current of ~2x that, so we actually open at 10A. Once it heats up a bit, that trip current can drop a bit, but it will always be over 5A and under 10A. Good test equipment makes this job nice and easy. The board is complete – time to book it up, just in time for the New Year – video.
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