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beardyw
on Jan 2, 2019
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Build your own IoT/MQTT node for less than $2
The esp8266 module itself runs at 3.3V but seems happy with a couple of AA batteries. Tried with CR3032 but it can't deliver enough current. After all, it is doing WiFi.
general8bitso
on Jan 2, 2019
[–]
Google ‘joule thief’.
Consider applying for YC's Summer 2025 batch! Applications are open till May 13
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