How do protect Reverse polarity switch and alert

Protect Reverse polarity

This circuit is an automatic reverse polarity switch. If we apply DC voltage to any electronic circuits in the wrong polarity. It can be caused by too much current. You must waste time to reverse the new terminal. If your circuit is important, let’s build this project to your life will better. Automatic Reverse polarity … Read more

6 ranges AC millivoltmeter circuit

AC millivoltmeter circuit

Sometimes, we need to measure a too tiny AC voltage level. And high frequency too. Ohh… We cannot use general multimeter. I recommend you try watching the AC millivoltmeter circuit. It includes the 6 ranges. Lowest is 15mV only. Also, it uses an analog meter form. So, you can watch easily a slow changing of … Read more

Logical guessing game circuit Diagram

Logical guessing game circuit Diagram

This circuit is the logic guessing game circuit that uses the digital ICs as the base of projects. They are used for playing, with 2 players, the first will set logic, and second-guessing logic. The code in this circuit is 4 switches. If a player can guess the code exactly as planned, will have the … Read more