12 V DC battery charge
This simple circuit for charging car batteries is interesting for its behavior which can be defined as similar to that of the alternator regulator mounted on cars.
It is in fact able to charge the battery up to the chosen voltage (normally 13.8 V) and keep it constantly without the risk of overcharging.
Its power is not bound to the scheme, which refers to the most convenient and recommended solution, but also works in smaller dimensions, taking longer, or larger with better results.
Bill of Materials
R1: 4,7 ohm
R2 : 100 ohm
R3 :1 K ohm
R4 : 1,5 K ohm
R5 : 680 ohm
P: 1 K ohm potentiometer
C1 : 1000 uF 25 V
C2 : 2,2 mF 25 V
T: Transformer 80 VA - 13,5 V
D1 : Bridge rectifier
D2-D3 : 1N4001
D4 : diode 50 V 15A
SCR :100 V 8-10A
IC : 7912 voltage regulator
LED :
F1- F2 : fuse
Gerber files available
12 V DC battery charge
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