12v power supply

This project is a temperature monitoring and fan control system. It uses an LM35 temperature sensor to measure the ambient temperature, and an Arduino microcontroller to read the sensor data and control three 12V fans. The system has three LEDs that light up in different colors depending on the...

I am trying to figure out why this portable speaker is sounding distorted even when plugged into the wall. My initial feeling is that its related to the 12v charging circuit but I may be wrong. The speaker was sitting from 2017 in a box and I opened it a few months ago. I tested it and straight...

Hi Experts, I've SMPS (AC to DC) which gives output of 12V, 20A, 240W, & I've to attach Peltier device (TEC1 12706) with SMPS, but Confusion is Peltier have max. Current rating as 6A, but SMPS is giving 20A, So how to limit o/p of SMPS to 6A, so it wont damage Peltier, how current regulation...

When I measured the input resistance of some 230V AC to 12V DC transformer based power adapters, I got around 400 ohms. Isn't this quite high for the resistance of the primary winding? I expected no more than 100 ohms. The adapters are low power though (output power< 10W). (Background story: I...

Yo guys, recently I bought the "Anhtczyx intelligent car battery charger". I connected it to a battery and tried the repair function. It worked only about 2 hours then it stops. I opened the device and realized that the fuse and the thermistor were blown. So I desolder them and solder new ones...