![]() You can also subscribe to our newsletter to receive more such useful electronics projects through email. Please share your feedback on this mini-project and also let me know if you have any queries. When the voltage across the battery cross the cut-off voltage, the relay will turn off and the battery will be disconnected from the supply. Then give the 220V or 110V supply, the green LED will turn on, which indicates the battery is charging. Finally, Auto Cut-Off Battery Charger is readyĬonnect a Lead Acid Battery at the Battery side (as per the circuit.) Please take proper safety precaution while working with 220V or 110V supply. Then rotate the potentiometer until the red LED turns on.Īfter setting the cut-off voltage disconnect the variable DC supply and connect the step-down transformer at the AC input, as shown in the circuit diagram. Now, to set the cut-off voltage, you have to connect a variable DC power supply at the DC input and connect a multimeter (voltmeter) at the battery side as shown.įor example, to set the cut-off voltage at 13V, you have to give 13V at DC input. Now, the Auto Cut-Off Charger PCB is ready.Solder those Components as shown in the circuit.Two AA batteries (1.5v) in series produces 3v from end to end. Two batteries connected in series (like in a flashlight) have sum of the voltage of the two batteries. You can use this circuit 6v to 12v batter. Two batteries connected in parallel have the same voltage as one battery, but twice the capacity to deliver current. Connect all the components as shown on the layout Hello friends, today in this video Ive shown how to make a simple short-circuit protection circuit using a relay.At the end of every poly attach a bronze wire formating the - and the + pole. (AA,AAA).open a hole in the center of the wood and pass the 2 cables for + and - poles. With that way goes power from the 220VAC to the wooden battery. Now connect the two edges of the cables coming from the wooden battery to a male RCA coneccting to a female RCA placed on the docking station. (The bulb should dim slightly. take a piece of wood and cut it till be a cilinder of the shape of the battery type you want. At the end of every poly attach a bronze wire formating the - and the + pole. They will then add another light bulb to the series and record their observations at to how the brightness of the bulbs changed when the third bulb was added. Drill the holes for the components as shown on Layout The groups will be asked to first build a series circuit with two light bulbs.Print the PCB Layout and stick it on Acrylic sheet or cardboard.Steps for making the Automatic Battery Charger circuit on PCB
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