Solid-state AC switch Designed for AC commutation and load management of low-voltage circuit is input to the detector optodriver zero phase, which provides galvanic isolation.
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Solid-state AC switch
Cpu Cooler Failure Alarm
The device is designed to beep when you stop the fan that cools the CPU PC (ie, cooler). The indicator is included in the break cord fan, the size of the PCB 40×32.5 mm (fits into a matchbox). Schematic diagram of the indicator is shown in Fig. 1
A Motion Sensor for Security Lights
The description of a system based on a passive infrared motion detector (PIR) type BS1600 or BS1700, which can be used for security or corridor lighting in a power saving mode. Transformerless power supply generates a constant voltage of 12 V supply voltage 230 V/50 Hz power supply to the motion sensor and the relay coil (Fig. 1).
Figure 1
The scheme works very simply. When you turn on the device after assembly of all components, including a fluorescent lamp, the lamp will be lit for 10 seconds, stops for 30 seconds, turn on again for 10 seconds, and finally shut down. Now the scheme is ready to work.
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