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Results tagged with battery
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user 38000
A battery is an electrical power source which is often portable.
1
vote
NodeMCU powered with battery and use WiFi
If your battery is fully charged it’ll supply abount 4.2V.
The ESP should be able to handle up to 4.7V fine (according to this forum post), except that it’ll draw more current. … If you’re battery-powering and want to use deep sleep, also consider using a different regulator with a lower quiescent current (e.g. MCP1702), otherwise the AMS1117 is already drawing at least 4mA. …
- 121
1
vote
NodeMCU power consumption measurement and DeepSleep
So, when you’re running from battery, be sure to power the 3.3V supply of the board, not the 5V input that goes through the regulator first. … When your battery is fully charged it’ll give 4.2V, which may just be enough for the regulator still. With the ampmeter in between it’ll definitely be too low. …
- 121