Theremin circuit is a device which generates musical effects in response to the capacitive proximity of a human hand. This is the only musical instrument known to the writer that […]
Simple Metal Detector Circuit
This circuit can be used to detect the presence of any metal within the detection range of the sensor coil. In this post we will learn how to make a […]
Magnetic Proximity Switch Circuit
This magnetic proximity switch circuit can be used to switch a load ON/OFF when a magnetic field is detected. How the Circuit Functions The Magnetic Proximity Switch Circuit is based […]
Light Activated Switch Circuit
This light activated switch circuit, automatically switches ON a connected lamp when night falls, and switches it OFF during day break. It has many applications, it could be used as […]
PIR Motion Sensor Circuit
This PIR motion sensor circuit detects a human presence and can be used to sound an alarm when a human is detected within its range. This is my smallest, cheapest, […]
Automatic Day/Night Switch Circuit using Bi-Metal Strip and LDR
The following explained automatic day night switch circuit using a Bi-Metal strip and an LDR is able to automatically illuminate your porch light or power up some other equipment once […]