This is capricious ability accumulation for multi purpose acceptance and actual advantageous to accumulation your cyberbanking accoutrement or your projects. Voltage ambit will be 0.7 - 24V and the urrent attached ambit is 50mA - 2A.
Components:
P1____________500R Linear Potentiometer
P2_____________10K Log. Potentiometer
R1,R2__________2K2 1/2W Resistors
R3____________330R 1/4W Resistor
R4____________150R 1/4W Resistor
R5______________1R 5W Resistor
C1__________3300µF 35V Electrolytic Capacitor (see Notes)
C2_____________1µF 63V Polyester Capacitor
D1,D2_______1N5402 200V 3A Diodes
D3____________5mm. Red LED
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
T1____________220V Primary, 36V Center-tapped Secondary
50VA Mains transformer (see Notes)
PL1___________Male Mains plug
SW1___________SPST Mains switch
Notes:
- P1 sets the maximum output current you want to be delivered by the power supply at a given output voltage.
- P2 sets the output voltage and must be a logarithmic taper type, in order to obtain a more linear scale voltage indication.
- You can choose the Transformer on the grounds of maximum voltage and current output needed. Best choices are: 36, 40 or 48V center-tapped and 50, 75, 80 or 100VA.
- Capacitor C1 can be 2200 to 6800µF, 35 to 50V.
- Q4 must be mounted on a good heatsink in order to withstand sustained output short-circuit. In some cases the rear panel of the metal box in which you will enclose the circuit can do the job.
- The 2N3055 transistor (Q4) can be replaced with the slightly less powerful TIP3055 type.
