The following is the assembly instruction of a simple commercial UPS, giving stable output at 12 and 5 volts.
Input/Outputs Description
J1 = 220 AV Input
J2 = 12 Volts Rechargeable battery pack
J3 = 5 Volts Output
J4 = 12 Volts Output
Schematics
BR1: 4x 1N4001
D1, D2, D3: 1N4001
C1: 2000 microF
C2: 100 microF
C3: 1 microF
R1: 15K Ohm
R2: 220 Ohm
J1, J2, J3, J4: Jacks
LM7800C
Transformer 220AV/12DC
LED
