Recommended · for beginners
Tutorial: How to design a transistor circuit that controls low-power devices
Why people recommend it
A tutorial on using a transistor to switch a load that an Arduino pin cannot drive directly, commonly suggested for relays, motors and LED strips.
Watch for: Remember the base resistor and a flyback diode for inductive loads
In their words
This handy YouTube video also helped me understand some of the logic or what I think is the logic.
Jon Angliss on electronics.stackexchange.com, Mar 2020. CC BY-SA.
For information about how to choose the transistor and the base resistor, I recommend Ben Krasnow's excellent video tutorial:
raek on electronics.stackexchange.com, Jul 2015. CC BY-SA.
I'm a big fan of Ben Krasnow He has an excellent youtube page and in particular a video on designing transistor switching circuits for microcontroller applications
Aaron on electronics.stackexchange.com, Jan 2017. CC BY-SA.
