Easy and work project

Hello, I will show you how to make an off-timer delay. This circuit is simple and uses only 3 electronic components. The off time of this circuit is around 15 seconds. But you can change the R-value to increase or decrease off time. Let's make it like the below video.

Hello, today I will show you how to make a simple fan speed control by just 3 electronic components I use only 3 parts One is a 10 kilo-ohms resistor An IRF540N NPN MOSFET and a 10 kilo-ohms potentiometer No heatsink require for less than 2 A load  I use a MOSFET instead of a transistor because a MOSFET control input by voltage so it's easy to bias Let's start by connecting the resistor to the positive terminal and connect another leg to a MOSFET gate connect a MOSFET gate pin to a 10 kilo-ohms potentiometer. two resistor works as a voltage divider connect a MOSFET drain pin to the ground and also connect the potentiometer middle leg to the ground This circuit use only two legs of a potentiometer Then connect a source pin to the load negative pin and connect the load positive pin to 12 volt or positive terminal. See the video below for practical use.