12volt-transformerless-power-supply.html

Description: This is a 12V 100mA transformerless power supply designed for low current applications. C1 is an X-rated AC capacitor that reduces peak AC voltage. D1-D4 are diodes that rectify AC to DC, and C2 is used to filter out ripple voltage. R1 acts as a bleeder resistor to discharge stored current when the power is disconnected. R2 is utilized to limit inrush current. A Zener diode can be used at the output to provide regulated DC voltage.

The 12V transformerless power supply circuit is designed to deliver a stable output voltage of 12 volts at a maximum current of 100 mA, making it suitable for powering low-power electronic devices. The absence of a transformer simplifies the design and reduces the overall size and weight of the power supply, which is advantageous in portable applications.

The X-rated capacitor, C1, is crucial for this design as it is specifically designed to handle AC voltage and provides safety by preventing high voltage spikes from reaching the output. The rectification is accomplished using a bridge rectifier configuration formed by diodes D1 through D4, which converts the alternating current (AC) input into direct current (DC). Following rectification, capacitor C2 smooths the output by filtering out the AC ripple, ensuring a more stable DC voltage.

Resistor R1 serves as a bleeder resistor, which is important for safety. It discharges the stored charge in the capacitors when the circuit is powered down, preventing electric shock hazards. Resistor R2 limits the inrush current when the circuit is powered on, protecting sensitive components from damage due to sudden surges.

To achieve regulated output, a Zener diode can be added to the circuit. This component allows for voltage regulation by maintaining a constant output voltage despite variations in input voltage or load conditions. The Zener diode operates in reverse bias and clamps the output voltage to its breakdown voltage, providing a reliable power source for the connected load.

Overall, this transformerless power supply circuit is efficient and compact, making it suitable for various low-power applications such as LED lighting, small sensors, and other electronic devices that require a stable 12V DC supply. Proper attention should be given to component ratings and safety measures, especially when dealing with AC mains voltage.This is a 12V 100mA Transformerless power supply in support of low current applications. C1 is the X rated AC capacitor so as to reduces climax volt AC. D1-D4 rectifies AC to DC and C2 removes ripples. R1 is the bleeder to remove stored current clothed in AC while power is rancid. R2 limits inrush current. A Zener can stay used in the output to pi ck up regulated DC. You are reading the article about 12Volt Transformerless power supply and you can find articles 12Volt Transformerless power supply this the url. You may distribute or copy articles 12Volt Transformerless power supply this is beneficial if you or your friends, but do not forget to include the link source.