Thyristor drive circuit

The circuit primarily consists of a new pyroelectric infrared sensor device, TDH98072, which features a special composition. This device is integrated with a control circuit characterized by simplicity, ease of adjustment, and high reliability. Additionally, the device can be combined with other control circuits, including applications for burglar alarms, automatic light control, and automatic valves. A CdS photoresistor should be selected with a light resistance of less than 100k in brighter environments and greater than 3.3M in dark conditions. The pyroelectric infrared sensor (PIR) can be any small pyroelectric sensor equipped with a lens, such as the ANM1 type.

The circuit utilizes the TDH98072 pyroelectric infrared sensor, which detects motion by measuring changes in infrared radiation in its environment. This sensor is particularly effective for applications requiring motion detection due to its sensitivity to heat emitted by objects, such as humans or animals. The control circuit associated with the sensor is designed for straightforward integration, allowing for adjustments to sensitivity and response time to suit various applications.

In the context of burglar alarms, the sensor can trigger an alert when it detects movement in a predefined area. This is accomplished through a relay or microcontroller that receives the output signal from the TDH98072. For automatic light control, the sensor can activate lighting systems when it detects occupancy, enhancing energy efficiency. The integration of a CdS photoresistor adds an additional layer of functionality, allowing the circuit to differentiate between day and night conditions, thereby preventing unnecessary activation of lights during daylight.

The choice of a CdS photoresistor with specific resistance values ensures optimal performance under varying lighting conditions. In bright environments, a lower resistance value (less than 100k) allows the circuit to remain inactive, while in darker conditions, a higher resistance (greater than 3.3M) enables the circuit to respond to the presence of individuals.

Furthermore, the incorporation of a small pyroelectric sensor with a lens, such as the ANM1 type, enhances the detection range and accuracy of the system. The lens focuses infrared radiation onto the sensor, improving its ability to pick up subtle movements. This design consideration is crucial for applications where precision and reliability are paramount.

Overall, the TDH98072-based circuit exemplifies a versatile solution for various automation and security applications, combining ease of use with high reliability and adaptability to different environmental conditions.The circuit mainly by new pyroelectric infrared sensor device TDH98072 special composition. The device is assembled with a control circuit having a circuit is simple, easy adjustment and high reliability. The device can also assemble other control circuits, such as burglar alarm, automatic light control, automatic valves and the like. CdS photoresistor light resistance should be selected (brighter environment at the resistance) is less than l00k, dark resistance is greater 3.3M products. Pyroelectric infrared sensor PIR can choose any of a small pyroelectric sensor (bring along a lens, such as ANM1 type).