12V volts being reduced through a PN2222 – electronics.stackexchange.com

12V volts being reduced through a PN2222 – electronics.stackexchange.com

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I'm trying to build a circuit for controlling the speed of a fan from an ESP8266 MCU. I have a PN2222 transistor with the base connected through a 1K resistor to a digital out of the MCU. The ...

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