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12V Battery Guardian Circuit: Protect Your System's Power
Description
Avoid experiencing a depleted battery; this straightforward circuit can interrupt electricity supply to a 12V refrigerator or automobile entertainment system when the battery voltages fall below a critical threshold. Refrigerators mounted in vans and all-wheel-drive vehicles represent a beneficial innovation, however, without diligence, they can significantly drain the battery and potentially result in being stranded. The battery may also suffer substantial damage as a consequence. The same difficulties arise if a large audio system is operated without the engine running.
Key Characteristics:
- Disables power to the connected device (for example, a refrigerator) if the battery voltage decreases below a defined level.
- Capable of handling a current of 10A.
- Minimal power consumption.
- An audible beep alerts when power is interrupted.
- A blinking LED indicates the interruption of power.
- Automatically restores power once the battery is replenished.
Operation at 12V is suitable while the engine is running and the battery charge is maintained, yet if the refrigerator is permitted to function for extended periods with the engine stopped, it can reduce the battery's charge level in a relatively short timeframe. This is where the Battery Guardian performs its function. It continuously observes the battery voltage and disconnects the power to the refrigerator prior to the battery reaching a critically low level, enabling the engine to restart.
Components layout:
Printed Circuit Board (PCB) arrangement:
Circuit diagram:
