3 and 30V power 3amp
This power supply is meant as an auxiliary or as a permanent power supply for all common circuits based on a stabilized DC voltage between 3 and 30V provided that the consumption does not exceed 3A. Of course this power supply unit can also be used for other purposes. Be replacing the trimmer by a potentiometer, it may even be used as an adjustable power supply unit. A good quality heatsink must be used. Circuit diagram: 3 TO 30 Volt 3 Ampere DC Power Supply Circuit Diagram Parts list: R1 = 8.2K R2 = 2.2K R3 = 680R R4 = 1K R5 = 82K R6 = 0.18R/5W C1 = 470p C2 = 100nF-63V C3 = 100nF-63V C4 = 100uF-63V C5 = 10KuF-60V D1-D6 = 6.6A Q1 = MJ3001 (Darligton) IC1 = UA723D Specifications: Overload protected Sshort-circuit stable Output current: max. 3A Output ripple voltage: 0.5mV Output voltage: adjustable from 3 to 30V, stabilized Input voltage: 9 to 30V AC (depending on the desired output voltage)