Electronics > Beginners
19V PSU charging 12V lead acid battery
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MarkF:
Also see:  https://www.eevblog.com/forum/beginners/bench-power-supply-battery-charging-circuit/
nuclearcat:

--- Quote from: floobydust on September 17, 2019, 08:22:41 pm ---ESP8266 has a crappy A/D, not good enough here. Noisy, non-linear 10-bit 0-1V input range, poor accuracy you need to calibrate it and have to shut off the RF TX circuit to get a reasonable reading. I thought the internal 1V reference does poor over temperature too but can't find that correction graph.
https://www.espressif.com/en/support/download/documents

--- End quote ---
That make me wonder if it is better to add some $1 STM32F0/F1, simplify some circuits and have more measurement points (current + voltage, proper PWM, sleep modes, etc).
Seems ESP8266 is not great for anything than very generic MCU jobs and as wifi bridge.
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