Parts :
|
Parts |
Description |
|
R1 |
270 Ohm ¼ Watt |
|
C1 |
100nF 250V Polyester Capacitor |
|
C2 |
1000uF 25V Electrolytic Capacitor |
|
Sw1 |
SPST |
|
Sw2 |
SPDT |
|
PL |
Male Mains Plug |
|
T |
220V or 120V primary, 20V Center-tapped Secondary 3A Mains transformer (see Notes) |
|
F |
2A Fuse (see Notes) |
|
D1, D2 |
IN5401 (see Notes) |
|
D3 |
BZY88 12V Zener Diode (see Notes) |
|
Q |
2N3055 NPN Transistor (see Notes) |
|
MISC |
Heatsink for Q |
|
Lp |
12V 0.006A DC Lamp (see Notes) |
Notes :
If we need lower power output, change :
|
Parts |
Description |
|
T |
220V or 120V primary, 15V Center-tapped Secondary 1A Mains transformer |
|
F |
500mA Fuse |
|
D1, D2 |
IN4001 |
|
Q |
BD131 NPN Transistor |
|
MISC |
Heatsink for Q |
Change D3 with another value, example : 3V, 6V, 7V, 9V, etc, if we need different Voltage Output.
We don’t have Center-tapped (CT) Transformer, use this circuit :
Filed under: Power Supply
