Part2:how the ht12e & ht12d encoder & decoder ic work

Part1: 4 channel rf remote control and receiver, each button for different load, u can turn on the load simultaneously.
Part1:make RF remote control & receiv...

How to design circuit diagram on software application(palm draft)
How to design circuit diagram on app ...

Part2 security alarm circuit
Part2(Infra red) security alarm circuit

Part1 step by step how to make proximity sensor ( using operational amplifier ic)
Part1 step by step how to make proxim...

Part2 :How the dc dc boost converter work fully detailed
Part2 how the dc dc boost converter w...

How the password circuit lock  (cd4017)
How the password circuit lock work(cd...