S-60-12 Power Supply Circuit Diagram Apr 2026

He connected an old LED strip. It blazed to life.

“This is the etiquette section,” Manish chuckled. “The power supply says, ‘I will take your energy, but I won’t pollute the radio spectrum.’” Next came the bridge rectifier —a black, square, four-pin component (often a KBL406 or similar). It takes the 120V or 230V AC sine wave and flips the negative humps upward, creating a pulsating DC voltage. Manish scoped it: a bumpy 120Hz waveform (if in North America) or 100Hz (in Europe). s-60-12 power supply circuit diagram

The MOSFET’s source connects to a (a low-ohm, high-wattage resistor like 0.33Ω). This resistor tells the UC3842: “If too much current flows, shut down immediately.” It’s the overload protection. He connected an old LED strip

The UC3842 needs a startup voltage. A few high-value resistors (two 150kΩ in series) trickle-charge a small capacitor (C6, 47µF/50V) until the chip wakes up. Once awake, the chip sends square waves to the MOSFET’s gate via a small resistor (e.g., 22Ω) and a fast diode. “The power supply says, ‘I will take your