A Magnetic Proximity Switch Sensor Circuit is a cool gadget that can sense magnetic fields. You can see this kind of sensor in lots of places, like in factories, security systems and automation. The key component of this circuit is a magnetic reed switch which serves as the proximity sensor. In this design an 555 […]
Sensors and Detectors
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Simple Sound-to-Beep Circuit using IC CD4049
This fun sound-to-beep circuit uses the CD4049 chip and is a simple way to detect sounds. It can turn a whistle into a beeping sound! When it hears a whistle it beeps for about three seconds. You can use it for different things like door alarms remote controls, and other systems that respond to sounds. […]
Simple Dark Sensor Circuit for Security using IC 555 timer
A simple dark sensor circuit designed for security purposes uses the timer IC 555 This electronic design can detect low light levels and activate a response such as turning on a buzzer or a light. It employs a standard light-dependent resistor LDR to sense light. This circuit is quite handy for various security applications such […]
Simple Dark Sensor Circuit with Buzzer
A simple dark sensor circuit with a buzzer is an easy to make electronic project that can detect when there is no light and then make a sound. This kind of circuit can be used in different areas like automatic night lights, security systems and alarms. It works by using a LDR along with a […]
Simple LED Alert for Telephone Off-Hook Detection Circuit
This LED Alert for Telephone Off-Hook Detection Circuit is designed to show when a phone line is in use by lighting up an LED. It works by sensing a change in voltage on the phone line when the handset is picked up which means the line is off-hook. This circuit can easily be used with […]
Simple Mobile Incoming Call Detector Circuit
The Simple Mobile Incoming Call Detector is a clever circuit designed to pick up incoming calls on a mobile phone and light up an LED. This circuit is really useful in loud places where you might not hear the regular ringtone. It works by detecting the radio frequency RF signal that a phone sends out […]