Troubleshooting a PIR light with rogue current draw.
bigclivedotcom 8:34
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This small battery operated PIR light was drawing excess current in standby mode, runnning its batteries flat very quickly. The fault was interesting and unexpected.
Given the continuous standby current of 10mA at 4.5V I wondered if the rogue component dissipating the power would show up on a thermal camera. It did, and more interestingly it could also be detected by probing with a cheap thermocouple.
Ironically, desoldering the faulty component also made its fault clear, suggesting perhaps a moisture ingress issue.
A link to Mike's epic Flir E4 teardown. https://www.youtube.com/watch?v=NtqUE67BUDI
If you enjoy my videos you can support the channel with a dollar for coffee, cookies and gadgets at https://www.patreon.com/bigclive
Given the continuous standby current of 10mA at 4.5V I wondered if the rogue component dissipating the power would show up on a thermal camera. It did, and more interestingly it could also be detected by probing with a cheap thermocouple.
Ironically, desoldering the faulty component also made its fault clear, suggesting perhaps a moisture ingress issue.
A link to Mike's epic Flir E4 teardown. https://www.youtube.com/watch?v=NtqUE67BUDI
If you enjoy my videos you can support the channel with a dollar for coffee, cookies and gadgets at https://www.patreon.com/bigclive
Category (YouTube): Science & Technology
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