Home / Circuit Diagram / 12V Battery Charge/Discharge Indicator Using The Dual Op-Amp LM358 | 12v battery level indicator

12V Battery Charge/Discharge Indicator Using The Dual Op-Amp LM358 | 12v battery level indicator

12V Battery Charge/Discharge Indicator Using The Dual Op-Amp LM358 | 12v battery level indicator

Parts Used:

Resistors: (1/4 Watts)

R1 – 10K

R2 – 10K

R3 – 10K (preset)

R4 – 10K (preset)

R5 – 1.5K

R6 – 1.5K

R7 – 1K

R8 – 1.5K

R9 – 1.5K



IC:

U1 Dual Op-Amp LM358


LEDs:

Red

Green

Yellow


Fuse:
100mA

12V Battery

General purpose PCB

Circuit Description:
This circuit monitors the 12V battery voltage. It provides an indication of normal supply voltage as well as low and high voltage. RV1 and RV2 adjust the point at which the red/yellow and yellow/green LEDs are on or off. For example the red LED lights up at 11V and the green LED at 12V. The yellow LED remains on between these values.

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