Job Recruitment Website - Zhaopincom - Hello, maintenance masters, I want to ask that I have an AC transformer of 18V, and I want to charge the battery of 12v. The problem is that I should add.

Hello, maintenance masters, I want to ask that I have an AC transformer of 18V, and I want to charge the battery of 12v. The problem is that I should add.

The voltage of 18V is too high to charge the battery of 12V. 14V is the most suitable. You need to add four diodes or a complete bridge to make a simple charger. If you want to use a transformer of 18V, you can add a high-power transistor of 1 and an adjustable resistor behind the rectifier circuit to adjust the rectified voltage of 18V to 14V.