3 ms·

I ordered a few by accident from AliExpress and they showed up yesterday. I don't know for the life of me what to do with them. I was thinking maybe as a temper

by roel_v 6y ago

I ordered a few by accident from AliExpress and they showed up yesterday. I don't know for the life of me what to do with them. I was thinking maybe as a temperature/humidity monitor thing, but it would have to be mains powered because I don't think there's a way to make a device like this diy'able (with arduino and dht22 level components) and make it run off a battery for more than a few months. So any suggestions are good.

chris_st 6y ago
Look into the low-power mode of whatever microcontroller you're using... I did an AT-Tiny85 project, and it burned through the battery. I then switched to low power for a while, and it draws micro-amps (!) when in low-power mode, so the battery would have lasted hundreds of times longer. Oh... umm... the display, yeah. Maybe have an on-button for the display to power it up only when you want it?
- ISL 6y ago
  As long as the microcontroller has a sleep mode, you can use a relay (for-real or solid-state) to toggle the power for the display.
  - chris_st 6y ago
    Great idea, thanks!