2N3055 Variable DC Voltage Power Supply
Topics: Power Supplies / DC Power Supplies
This is a schematic (circuit diagram) for a relatively simple variable-voltage DC power supply, with 0.7-24 Volts DC and 0.05 - 2.0 amps current.
The main power transistor used is the 2N3055, a common NPN transistor used in high current DC power supplies. The 2N3055 can be replaced with the slightly less powerful TIP3055. The other control transistors used in the circuit are 1 x BC182, 1 x BD139 and 1 x BC212.
Instruction are given regarding the potentiometers, heatsinks, etc.. Enjoy - let us know if you build this DC power supply circuit, and how it works out!
COMPONENTS:- Potentiometers:
- P1 = 500R Linear Potentiometer
- P2 = 10K Log. Potentiometer
- Resistors:
- R1,R2 = 2K2 1/2W Resistors
- R3 = 330R 1/4W Resistor
- R4 = 150R 1/4W Resistor
- R5 = 1R 5W Resistor
- Capacitors:
- C1 = 3300μF 35V Electrolytic Capacitor (see Notes)
- C2 = 1μF 63V Polyester Capacitor
- Diodes:
- D1,D2 = 1N5402 200V 3A Diodes
- D3 = 5mm. Red LED
- Transistors:
- Q1 = BC182 50V 100mA NPN Transistor
- Q2 = BD139 80V 1.5A NPN Transistor
- Q3 = BC212 50V 100mA PNP Transistor
- Q4 = 2N3055 60V 15A NPN Transistor
- Misc:
- T1 = 220V Primary, 36V Center-tapped Secondary (50VA Mains transformer [see Notes])
- PL1 = Male Mains plug
- SW1 = SPST Mains switch
- 2n3055
- 2n3055 Power Supply
- Power Supply 2n3055
- Variable Dc Power Supply
- Variable Dc Voltage
COMMENTS