Description: 20V child-friendly power supply circuit for a foreign vine wine light, including a bulb and plug. The circuit features a bridge rectifier. The lamp access point is designed for a 10-100W bulb with a compact size. The output is managed by a triac that controls the release of current. The circuit includes resistors (R), capacitors (C1, C2), and a rectifier to regulate output voltage. The SCR gate discharges, activating the SCR to illuminate the lamp. The current voltage crosses zero, turning off the SCR and allowing the cycle to repeat, resulting in a flashing light effect. The interval time of the flashing can be adjusted through specific components.
The described circuit is a 20V power supply designed for a child-friendly application, particularly for illuminating a decorative light associated with foreign vine wine themes. The circuit employs a bridge rectifier to convert alternating current (AC) to direct current (DC), ensuring a stable power supply for the lamp. The inclusion of a triac allows for effective control of the current flow to the lamp, enabling dimming and flashing effects.
The circuit's architecture consists of several key components: a series of resistors (R), capacitors (C1, C2), and a silicon-controlled rectifier (SCR). The resistors are utilized to limit current and set voltage levels throughout the circuit, while the capacitors serve to smooth out fluctuations in the output voltage, providing a more stable operation.
The SCR plays a crucial role in the operation of the lamp. When the gate of the SCR is triggered by the discharge from C2, the SCR turns on, allowing current to flow through the lamp and illuminate it. The design ensures that the SCR remains on until the current drops to zero, at which point it turns off, creating a flashing effect. This zero-crossing feature is significant as it minimizes electrical noise and potential flickering in the lamp.
A normally open pushbutton switch (SI) provides a positive input pulse to pin 4 of U1, activating the integrated circuit (IC). The output from U1 at pin 6 delivers base-drive current to a Darlington pair consisting of Q1 and Q2,...
The circuit operates with a 220V mains supply through a diode (VDi) configured as a half-wave rectifier. Capacitors C1 to C3 are charged, and due to the lack of full synchronization in the charging process, a pilot thyristor is required...
It is very convenient to automatically light a lamp in our absence during the evening when it gets dark. This automatic night lamp circuit can be utilized to illuminate staircase lights, porch lights, etc., automatically using a domestic power supply....
The circuit presented here ensures that if bulb La1 fails, bulb La2 will take over its function. In series with La1 is triac Tri2. Resistor R3 and capacitor C2 form a delay network. When the voltage across C2 exceeds approximately...
This circuit gradually illuminates a 120VAC lamp over an approximate 20-minute period. A bridge rectifier provides 120V DC to the MOSFET and the 60-watt lamp. A 6.2K, 5-watt resistor along with a Zener diode is utilized to reduce the voltage...
The circuit utilizes a 220V AC voltage input that is processed through a capacitor (C1) for bucking, followed by a rectifier bridge (UR) which acts as a barrier-wave rectifier. A filter capacitor (C2) is used to smooth the output voltage...
This circuit gradually illuminates a 120VAC lamp over an approximate 20-minute period. A bridge rectifier provides 120V DC to the MOSFET and the 60-watt lamp. A 6.2K, 5-watt resistor and a zener diode are employed to reduce the voltage to...
This is a power supply circuit that produces a voltage range of 12 to 24 V. It is straightforward, requiring only a bridge rectifier, a filter capacitor, and a transformer, without the need for a regulator. A bridge rectifier utilizes...
The purpose of this circuit is to power a lamp or other appliance for a given time (30 minutes in this case), and then to turn it off. It is useful when reading at bed by night, turning off the...
We use cookies to enhance your experience, analyze traffic, and (if you allow) serve personalized ads.
By clicking Accept All, you agree to our use of cookies.
Learn more