Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)

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By Vertigoxx
#94984 I'm trying to read capacitor voltage via A0 pin. Reading works fine, but now I want to trigger the reading only at specific intervals to avoid capacitor discharge. Positive capacitor output is always conected to A0. Negative is connected to ESP8266 via a transistor - only when I send a high signal to the base of this NPN transistor. However, I always get a capacitor voltage reading on A0 - even when transistor is off. What could be the issue