SH-803R produced by high-power holiday lights

Description: 22V AC is supplied through thyristors VSl to VS4 for lighting control. The current is routed through transformer T, followed by rectification using diodes VD1 to VD4, and regulated by VD5 to provide a filtered output of approximately 4.7V DC. A synchronization signal is provided by resistor R1, which integrates with the system. The circuit operates over a distance of 12 to 15 feet, utilizing transistors VT1 to VT4 to drive the high-power thyristors VSl to VS4 for controlling lights H1 to H4. When a distance of 12 feet is reached, a high output from VT1 is achieved through resistors R4, which forward biases the transistor. This allows current from the bridge rectifier (VD1 to VD4) to flow through thyristor VS1, triggered by an LED (LED1) and a 12V positive supply, completing the loop and turning on lamp H1, which emits an indigo light. As the output chip processes various waveforms at distances of 12 to 15 feet, lights H1 to H4 will flash in a pre-determined pattern. LEDs LED1 to LED4 will indicate the synchronous flashing of lights H1 to H4, serving as operational indicators.

The circuit described operates on a 22V AC supply, which is essential for the initial power input. The thyristors VSl to VS4 are critical components that manage the power delivered to the lighting fixtures (H1 to H4). The transformer T steps down the voltage appropriately and isolates the circuit for safety and efficiency. The bridge rectifier composed of diodes VD1 to VD4 converts the AC voltage into DC, which is necessary for the subsequent regulation and filtering stages. Diode VD5 acts as a voltage regulator, ensuring that the output voltage remains stable at approximately 4.7V DC, which is suitable for the control circuitry.

The synchronization signal generated by resistor R1 is vital for maintaining the timing and coordination of the lighting control. Transistors VT1 to VT4 amplify the control signals, allowing for the activation of the high-power thyristors. The operational range of 12 to 15 feet indicates the effective distance over which the system can reliably control the lighting. The use of resistors, such as R4, plays a significant role in biasing the transistors to ensure they operate within their specified parameters.

The triggering mechanism of the thyristors is critical for the operation of the lights. When the output from VT1 reaches a certain threshold, it enables the flow of current through the thyristor VS1, which in turn activates lamp H1. The indigo light emitted serves not only as illumination but also as a visual indicator of the system's operation. The internal chip processes various waveforms, allowing the circuit to produce a sequence of flashes for lights H1 to H4, which can be programmed for different operational modes.

The visual indicators (LED1 to LED4) provide real-time feedback regarding the status of the lights, ensuring that the user can easily identify which lights are active at any given time. This feature enhances the usability of the system, making it suitable for applications where visual cues are necessary for operation. Overall, this circuit exemplifies a well-designed lighting control system that integrates power management, signal processing, and user feedback effectively.22, Ov AC by thyristor VSl ~ VS4 H1-H4 electricity for lights, on the other hand it down through the transformer T, VDI ~ VD4 rectifier, VD5 regulator and Cl filtered output of about 4,7V DC voltage supply A manifold electricity. Rl is integrated providing a synchronization signal block. Manifold 12 to 15 feet through the transistor VTI-VT4 to drive high-power thyristor VSl ~ VS4. In order to control lights HI-H4 purposes. If a time 12 feet high output, VTI obtained by the resistors R4 forward bias is turned on, this time by the VDl ~ VD4 bridge rectifier output current through the thyristor VS1 second anode through a gate LEDl-- VTI and 12V positive supply constitute a loop, so the VSI opened, the lamp H1 lights up indigo light. When 12 to 15 feet by output chip internal procedures of the various waveforms when the trigger, H1 ~ H4 pattern will flash according to the procedure laid down.

LEDl ~ LED4 will vary HI ~ H4 lights flash synchronously, to be used as work instructions.