vk3xe,
@vk3xe@mastodon.hams.social avatar

Back to pulling out my hair tonight and I think of checking to see there isn’t a short between power rails… and there was. I’m used to overcurrent protection on the power supply or magic smoke letting me know I’ve made this mistake, but no this time the switching regulator was just protecting itself. I’d say I need a good collection of bodges to make this board work but the @jpm has me beat there this week

jpm,
@jpm@aus.social avatar

@vk3xe dead shorts are the first thing I look for before applying power at all, quick and easy to do with multimeter in continuity mode. If you find one, that’s when it gets tricky…

vk3xe,
@vk3xe@mastodon.hams.social avatar

@jpm yeah I suspect I’ll have learnt that lesson now!

jpm,
@jpm@aus.social avatar

@vk3xe hint: they’re usually hiding underneath a QFN touching the thermal pad…

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