A linear dimming controller
The circuit begins with an AC power source rated at 30V, which is fed into a rectification stage. The rectifier converts the AC voltage into a pulsating DC voltage. The positive output of the rectifier is connected to a fuse, which serves as a protective device to prevent overcurrent conditions that could damage the circuit components. Following the fuse, a 100W incandescent bulb is connected, which acts as a load and visual indicator of the circuit's operation.
The negative terminal of the rectifier is linked to a thyristor, a semiconductor device that controls the flow of current. The thyristor is used to switch the load on and off, allowing for control over the brightness of the bulb. The operation of the thyristor is influenced by the gate signal, which can be manipulated through the adjustment of a variable resistor (VR).
To ensure stable operation, a Zener diode is integrated into the circuit to provide a fixed bias voltage. This component helps to maintain consistent performance despite variations in input voltage or load conditions. The variable resistor allows for fine-tuning of the circuit, enabling the brightness of the bulb to be varied between approximately 15W and 60W. The adjustment of the VR changes the conduction angle of the thyristor, effectively modulating the power delivered to the load and, consequently, the brightness of the lamp.
This configuration not only provides a means of controlling the brightness of the lamp but also demonstrates fundamental principles of power electronics, including rectification, load control, and voltage regulation. The design is suitable for applications requiring adjustable lighting or other forms of load management.AC 30V through I). - After the dish rectified by its positive terminal connected to the fuse IA IOOW bulb, the negative terminal is directly connected to the thyristor connecte d overcast proud. DC voltage by IOOW bulb fork by horse, Makati to J2V Zener B. L radiation plate to provide a stable bias. Liao Xu rotation VRi, T-emitting rice Xu also like to increase the voltage. A wind so felt furrow end j Bu liters.., R Zhu silicon conduction angle increases, increasing the brightness of the lamp f drawer, figure VR value can IOOW lamp brightness in the range of about 15 to 60W under tJ One uniform change
Related Circuits
A solar water heating pump controller is an essential component in most solar water heating systems, whether DIY or commercially produced. Its primary function is to activate the pump when the fluid in the solar panel is at a...
During summer nights, the temperature is initially quite high. As time passes, the temperature starts dropping. Also, after a person falls asleep, the metabolic rate of one's body decreases. Thus, initially the fan/cooler needs to be run at full...
An automatic humidifier can be utilized for humidity control in households, hatcheries, poultry farms, or juvenile poultry houses. When the humidity level falls below 50%, the automatic humidifier activates to maintain a specific humidity level that is beneficial for...
The WS2512-TR1G is a Wide-band Code Division Multiple Access (WCDMA) Power Amplifier (PA) designed as a fully matched 10-pin surface mount module, specifically developed for WCDMA handset applications. This power amplifier module operates within a frequency range of 1920-1980...
The 8051 controller is mask-programmable, meaning it is programmed during manufacturing and cannot be reprogrammed afterward. However, the AT89C51 microcontroller, a derivative of the 8051, is reprogrammable. This device includes a timer, a serial port interface, and interrupt control,...
This circuit optimizes the operation of a solar hot water system. When the water in the solar collector is hotter than the storage tank, the pump runs. The circuit comprises two LM335Z temperature sensors, a comparator, and a MOSFET....