![How to calculate base resistor of a NPN transistor that drives a MOSFET? - Electrical Engineering Stack Exchange How to calculate base resistor of a NPN transistor that drives a MOSFET? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/akwcm.png)
How to calculate base resistor of a NPN transistor that drives a MOSFET? - Electrical Engineering Stack Exchange
![Turn Off 5V Sensors by GPIO - will it work with this Transistor / Resistor? - ESPHome - Home Assistant Community Turn Off 5V Sensors by GPIO - will it work with this Transistor / Resistor? - ESPHome - Home Assistant Community](https://community-assets.home-assistant.io/original/4X/8/5/4/8547b64382293919d0d11964ed7228f17c25cb8a.png)
Turn Off 5V Sensors by GPIO - will it work with this Transistor / Resistor? - ESPHome - Home Assistant Community
![transistors - Attempt to use 2n2222 as a switch, but it seems to work below 5v (all the way down to < 1v). Why? - Electrical Engineering Stack Exchange transistors - Attempt to use 2n2222 as a switch, but it seems to work below 5v (all the way down to < 1v). Why? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/6MIpl.png)
transistors - Attempt to use 2n2222 as a switch, but it seems to work below 5v (all the way down to < 1v). Why? - Electrical Engineering Stack Exchange
![arduino - Calculationg base-resistor between microcontroller and transistor - Electrical Engineering Stack Exchange arduino - Calculationg base-resistor between microcontroller and transistor - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/cRDR5.png)
arduino - Calculationg base-resistor between microcontroller and transistor - Electrical Engineering Stack Exchange
![Tube Time on Twitter: "here's a fun little mystery! see this 2N2222A transistor in a TO-18 metal case? there's 12V through a 1K resistor from the emitter to the base (reverse biased Tube Time on Twitter: "here's a fun little mystery! see this 2N2222A transistor in a TO-18 metal case? there's 12V through a 1K resistor from the emitter to the base (reverse biased](https://pbs.twimg.com/media/D9isizYU8AAXmhh.png)