12 V automatic charger

This is a very simple scheme of the console to your existing charger. Which will control the voltage of the battery charge and when it reaches the set level, disconnect it from the charger, thereby preventing the battery from overcharging. This device has absolutely no deficit parts. The whole circuit is built on just one transistor. It has LED indicators that indicate the status: is it charging or is the battery charged.

Who will benefit from this device?

Such a device will definitely be useful to motorists. Those who do not have an automatic charger. This device will make from your normal charger - a fully automatic charger. You no longer have to constantly control the charging of your battery. All you need to do is to put the battery in charge, and it will turn off automatically,only after full charge.
12V automatic charger

Automatic charger circuit

Automatic 12 V charger
This is the actual circuit of the machine. In fact, this is a threshold relay that is triggered when a certain voltage is exceeded. The threshold is set by the variable resistor R2. For a fully charged car battery, it is usually equal to 14.4 V. You can download the scheme here - http://www.mediafire.com/file/0ldtxs4ma6mt2q2/12V-Auto-Cut-Off-Charger_circuit_By_hawkar_Fariq.pdf Source: https : //sdelaysam-svoimirukami.ru/? do = lastcomments

Printed circuit board

Automatic 12V charger
How to make a PCB, you decide. It is not complicated and therefore it can easily be thrown on the breadboard. Well, or you can be fooled and done on the textolite with etching.


If all the details are working, the setting of the machine is reduced only to setting the threshold voltage by resistor R2. To do this, connect the circuit to the charger, but the battery is not yet connected. We translate the resistor R2 to the lowest position according to the scheme.Set the output voltage on the charger 14.4 V. Then slowly rotate the variable resistor until the relay trips. Everything is set up. Let's play with the voltage to make sure that the prefix is ​​working reliably at 14.4 V. After that your automatic charger is ready to work.

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