If you use a bridge diode (like schematic 2), then you don't need two 15 volt 6 amp op-amp ICs, but just one 15 volt 10+ amp op-amp IC.
20-22 Ampere 13.8 Volt Power Supply
Parts list for a BDX33 12 Amp based power supply:
- 2 x 15 volt 6+ amps
- 2 times two MR750 (MR7510) diodes (MR750 = 6 Ampere diode) or 2 times 3 1N5401 (1N5408) diodes.
- F1 = 1 Amp
- F2 = 15 amp
- R1 2k2 1 Watt
- R2 10k
- R3 1k 0.5 watt
- R4,R5,R6,R7 0.1 ohm 10 watt
- R8 4.7
- R9 6k8
- C1 two times 4700uF/35v
- C2 330uF/35v
- C0',C3,C4,C6,C10 100nF
- C7 330uF/25v
- C8 47nF
- C9 47uF/25v
- D1 1N5401
- D2 LED
- D3, D4, D5 1N4001
- IC1 78L15
- relay 12 volt 2x5 amp switching
- 3 darlington transistors: T0,T1,T2 = BDX-33 NPN TO-220 transistor
- Zd 8 or 9 volts, 5 watts
- P1 2k trimmer
This part is also the same. If using a bridge diode (like schematic 2), then you don't need two 15 volt 6 amp op-amp ICs, but just one 15 volt 10+ amp op-amp IC
12-13 Amplifier Power Supply (OverVoltage Protected)
Parts list for a 20 Amp BDX33 based power supply:
- 2 x 15 volts 12+ amps
- 2 times 3 MR750 (MR7510) diodes (MR750 = 6 Ampere diode) or 2 times 5 1N5401 (1N5408) diodes.
- F1 = 2 Amp
- F2 = 25 amp
- R1 2k2 1 Watt
- R2 10k
- R3 1k 0.5 watt
- R4,R5,R6,R7 0.1 ohm 10 watt
- R8 4.7
- R9 6k8
- C1 22000uF/35v
- C2 330uF/35v
- C0',C3,C4,C6,C10 100nF
- C7 330uF/25v
- C8 47nF
- C9 47uF/25v
- D1 1N5401
- D2 LED
- D3, D4, D5 1N4001
- IC1 7815
- relay 12 volt 10 amp switching
- Four darlington transistors: T0,T1,T2,T3 = BDX-33 NPN TO-220 transistor
- Zd 8 or 9 volts, 5 watts
- P1 2k trimmer