A teacher I know is stuck, with only npn transistors in the supply cupboard and the need to create a reversible motor drive for an Arduino project. Reversing ‘bridges’ have four switches (relay ...

For example, 16 MHz arduino running the 8 bit ... An inductive proximity sensor typically has an NPN transistor (open ... It had an electro-mechanical device called a switch made of brass that ...

Amazon has been getting creepier and creepier lately with their recommendations. Every time I log in, I’m presented with a list of new Blinky LEDs, Raspberry Pi accessories, Arduino shields,… ...