Friends in this video I will show you How To Make Transformerless Adjustable Power Supply Circuit With Voltage Level Indicator...Simple Transformerless Power Supply..Friends it is a very simple circuit and you can easily make the transformerless adjustable power supply circuit at your home..Friends the circuit diagram of the transformerless adjustable power supply circuit is in the video please see the circuit diagram..Friends in this circuit we will not use any transformer but friends we can easily run this circuit with direct electric line..Friends in this circuit we will use LM317 voltage regulator ic to regulate the voltage..Friends in this circuit we will also use a potentiometer to increase and decrease the output voltage of the circuit...Friends when we will turn the potentiometer accordingly clockwise the output voltage will increase and friends when we will turn the potentiometer accordingly anti clockwise the output voltage will be decreased..Friends as voltage level indicator we will use 4 led's in the circuit...When we will increase voltage level the 4 led's will turn on one by one..and friends when we will decrease voltage level the 4 led's will turn off one by one accordingly...Friends in this way the circuit will work..So friends if you want to know how to make a transformerless adjustable power supply circuit at your home then watch the video and follow my instruction...Thanks....
Used Materials..
1 piece blank pcb board, 1 piece 105J/450Volt capacitor, 1 piece 470k resistor, 4 pieces IN4007 diodes, 1 piece 1000uf/25volt capacitor, 1 piece 15volt zener diode, 1 piece LM317 voltage regulator ic, 4 pieces 1k resistor, 1 piece 220 ohm resistor, 1 piece 10k potentiometer, 4 pieces led bulb....
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