220V AC Powered White Led Lamp

Description: The circuit provides sufficient illumination suitable for reading purposes. Capacitor CX, in conjunction with diodes D1 through D4, constitutes the AC step-down circuit. CX lowers the high voltage AC from the mains to a low voltage AC, which is subsequently rectified by diodes D1-D4. Capacitor C1 filters out ripples from the AC, resulting in a low voltage DC supply to power the LEDs. CX is an X-rated AC capacitor that reduces AC voltage through its capacitive reactance property. Resistor R1 plays a crucial role in discharging the stored voltage from CX when power is turned off, thereby preventing the risk of electric shock. The number of LEDs can be increased by decreasing the value of R2. Given that the circuit is directly connected to the mains, extreme caution must be exercised to avoid electrical shock. No components should be touched while the circuit is connected to the mains.

The described circuit utilizes a capacitive step-down method to reduce the high voltage alternating current (AC) from the mains supply to a lower voltage suitable for powering light-emitting diodes (LEDs). The core components include an X-rated capacitor (CX) and a bridge rectifier formed by diodes D1 through D4. The primary function of CX is to lower the AC voltage through capacitive reactance, which is an essential feature for ensuring that the voltage levels are safe for subsequent processing.

Once the voltage is reduced, the AC current is directed through the bridge rectifier, which converts the alternating current into direct current (DC). This rectified DC is not yet suitable for powering LEDs directly, as it contains ripples that can affect performance. Therefore, capacitor C1 is employed to smooth out these ripples, providing a stable low voltage DC output that can effectively power the LEDs.

Resistor R1 is strategically included in the circuit to facilitate the safe discharge of any residual voltage stored in capacitor CX when the power supply is disconnected. This precaution is critical in preventing electric shock hazards, especially since the circuit interfaces directly with mains voltage.

Additionally, the circuit design allows for flexibility in the number of LEDs that can be connected. By adjusting the resistance value of R2, more LEDs can be added to the circuit without compromising performance. However, it is imperative to maintain safety protocols, as the circuit operates at mains voltage levels. Users must refrain from touching any components while the circuit is energized to mitigate the risk of electrical shock.

Overall, this circuit effectively combines safety and functionality, making it suitable for applications requiring reliable illumination while adhering to safety standards.It can give ample light even for reading purpose. Capacitor CX along with diodes D1 through D4 forms the AC step down circuit. CX reduces high voltage AC from mains to a low voltage AC which is rectified by the diodes D1-D4. Capacitor C1 removes ripples from AC so that low voltage DC is available to power the LEDs. CX is the X rated AC capacitor th at reduces AC voltage through capacitive rectance property. Resistor R1 is very important to remove the stored voltage from CX when power is switched off. This prevents lethal shock. More LEDs can be added by reducing the value of R2. Since the circuit is directly connected to mains, take utmost care to avoid shock. No components should be touched when it is connected to mains. We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon.