AC Phase Angle Control Circuit – Working This circuit is made up of very carefully designed components, I will go through each one and explain each block. Zero-Crossing Detection Circuit: First, in ...

Light operated switch circuit The sensor is a light-dependent resistor (LDR) made of CdS semiconductor whose resistance changes with light. In the presence of light its resistance becomes low, while ...

Automatic off timer circuit The collector voltage of transistor T1 goes high to light up LED2 (indicating that the timer circuit is enabled) and transistor T2 starts conducting. As the collector ...

This automatic park light switch with LDR automatically turn ON the light when the surrounding light dims to a preset level. The first circuit diagram is an NPN design intended for negative grounded ...

This light activated remote switch circuit comes with a significant though small current drain in order of 15mA and must be turned off while not in use. On the other hand, when using the CMOS timer ...

There are a wide range of applications for light sensitive switches: lighting, entrance door, automatic staircase, automatic opening of doors to the action of a ray of light, alarm systems, etc… Many ...

The main part of this LED chaser circuit diagram is 555 timer IC which generates some variable frequency. 555 timer IC is a general purpose IC which can be configured in some different modes like ...