I have a couple of Chinese programmable lab power supplies. Both switch mode power supply (SMPS) systems are rated for 110V-220V AC input. But the UNI-T UTP1306 power supply has an input voltage ...

This DIY 12V to 220V [su_tooltip content=”direct current” size ... which is amplified by 2 Darlington transistors and finally reach the secondary coil of mains transformer (2x10V/60W). With the help ...