DIY IR Proximity Sensor

How to make IR Proximity Sensor Hello guys In this post I will show how to make a simple IR proximity sensor IR Proximity have one IR LED & one Photodiode in this project LM358 IC is used Basic Working Principle   Basically IR LED will transmitte Infrared light when this light fall on reflecting surface…

Variable DC power supply circuit using LM317

  About the article Variable DC power supply is required frequently for any hobbyist, Different level of voltage sources needed in many different projects so it is next to impossible to arrange all type of fixed voltage source, at same time it is too expensive to buy those kits from market so why not we make a variable…