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Friends in this video I will show you How To Make A Transformer Less 4 volt Battery Charger Circuit With Battery Full Indicator.Transformer Less Power Supply Circuit...Friends it is a simple circuit and you can easily make this transformer less 4 volt battery charger circuit at your home..Friends in this circuit we will not use any transformer but you can operate this circuit by direct 220 volt ac..Friends you can also call it a transformer less power supply circuit..Friends in this circuit we will use two led's[Red and Green]..The Green led is circuit on indicator and the red led is battery charge level indicator..Friends if there is little voltage in the battery the red led will glow brightly but when the battery charge level will increase the red led brightness will decrease accordingly...And friends when the charge level of the battery will be full the red led will be off..Friends when the red led will be off it means the battery is fully charged..Friends in this way this circuit will work..Friends the circuit diagram of the transformer less 4 volt battery charger is in the video..Please see the circuit diagram..So friends if you want to know how to make a transformer less 4 volt battery charger circuit at your home then watch the video and follow my instruction...Thanks...
Used materials
1 piece blank pcb board, 1 piece 105j/400volt capacitor, 1 piece 470k resistor, 6 pieces 1N4007 diodes, 1 piece 470uf/16volt capacitor, 1 piece 10k preset, 1 piece bc547 transistor, 1 piece 220ohm resistor, 1 piece 1k resistor, 2 pieces led bulb[Green and Red]...
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