This circuit diagram is a transformerless power supply. Getting the low voltage DC output from the 220v AC mains, is very useful for the electronics field.
A transformerless power supply is a electronic circuit that converts high voltage AC input to low voltage DC at the low current, without using a transformer.
This type of power supply is used where place with the less space for the circuit.
| Identifier | Component | Value | Count |
|---|---|---|---|
| R1 | Resistor | 470K Ohm / 1W | 1 |
| R3 | Resistor | 1K Ohm | 1 |
| R2, R4 | Resistor | 100 Ohm / 1W | 2 |
| D1, D2, D3, D4 | Rectifier Diode | 1N4007 | 4 |
| D5 | Zener Diode | 6.2V / 1W | 1 |
| C1 | X-rated Capacitor | 474K / 400V | 1 |
| C2 | Capacitor | 1000uF / 50V | 1 |
| LED1 | Light-emitting diode | Any Color | 1 |
Here,
This is is a small circuit and cheap circuit that can be considerd as the advantages of this circuit.
This circuit is bangerous because of no insulation or no galvanic isolation. Also, can get low current. These things are able to considerd as the disadvantages of this circuit.
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