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Simple 6v battery guard circuit1/18/2023 ![]() If you don't wish to have this latching arrangement, you can very well eliminate the 1N4148 feedback diode. The existing low at pin#6 will also cause pin#3 to become permanently low through the linked 1N4148 diode, and thus the system will be latched, until power is switched OFF and ON again. The battery will now begin charging slowly and as soon a its terminals reaches at 7V, pin#2 will tend to become higher than pin#3, causing pin#6 of the IC to become low, switching OFF the relay and cutting off supply to the battery. This will switch ON the transistor relay driver, which in turn will shift the relay contact from N/C to N/O connecting the charging supply with the battery. Now when battery is connected, the supply from the battery will actuate the circuit, and assuming the battery to be in a discharged state, pin#2 will be lower than pin#3 causing a high at pin#6 of the IC. How it WorksĪssuming no battery is connected with the circuit, when power is switched ON, the relay contact will be at the N/C and no power will be able to reach the IC 741 circuit. The following circuit shows a simple automatic 6 volt 4 to 10 AH battery charger circuit using a 12 volt relay, designed to automatically cut off the supply to the battery as soon as the full charge level for the battery is reached. (At present i am charging my above said battery by simply using LM317 with 220 ohm and 1 kilo ohm resistors and a couple of capacitor) i'm awaiting your article, thank you". ![]() Please use transistor instead of relay to stop charging, and also tell me how to use 12 volt relay for the same circuit.Įxplain Which is safe and durable either relay or transistor to cut off charging. The charger should automatically stop charging as the battery is fully charged. "Dear sir, please post a circuit to charge 6 volt 3.5 ah lead acid battery from 12 volt battery.
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