The variable high voltage power supply 0-300V
Friday, July 6th, 2012
Here is the variable high voltage dc power supply circuit, which we can customize the output voltage from 0 to 311Vdc, and it is protected the current over limit that we define at about 100 mA. In the circuit you can see the T1 is a mains transformer with a ratio of 1:1, for security reasons , and reduces noise signal as well. Then the mains voltage from the T1 is rectified to DCvolt with bridge diode D1-D4, We use a No. 1N4007 that withstand voltage as 1,000V at the current 1A and and this DCV is filtered through the capacitor C1 – 220uF 400V be the big size electrolytic types, by the voltage drop across C1 is about 311VDC. The power MOSFET Q1 is controlled the current output, with using the resistor R3 – 500K adjust the voltage gate pin of Q1. The ZENER diode ZD1-12V is available prevent [...]













