Relay with toy motor with delay using a transistor.
42:18
Using the 555 Timer
25:00
Vape electronics revisited
15:57
Relays with toy motors an introduction
4:40
Simple Relay Oscillator
14:46
Move -delay -move back -stop with DPDT relay & 555 timer.
40:50
MOSFETs and Transistors with Arduino
11:41
Connecting a Relay Module to a Microcontroller
19:23