6.8 volt transformer power supply circuit diagram

A fairly simple power supply that can be built in an hour and a half. This program is designed for a voltage of 6.8V and a current of V300mA. Replace the zener diode D4 and the voltage can be changed, if necessary, with D3. A transistor heatsink setting and load current can be added. Diode Bridge - Any, pretty good with at least 400 volts reverse voltage . By the way, we can look back to ancient times and the diode D226B, which had a terrible popularity.

　　

　　WARNING!
　　The program is electrically isolated from AC, so you must be very careful when assembling, installing and using it.
　　Parts list:
　　R1: 4K7
　　R2: 5K6
　　R3: 3K9
　　C1: 1000uF/10V
　　D1: KU405B
　　D2: KC650A
　　D3: D817B
　　D4: KC168
　　T1: KT940A
　　T2, T3: KT815