An electrical circuit intended to recognize missing pulses within a sequence of incoming pulses is called a basic missing pulse detector circuit. The most often used part of this function is a monostable multivibrator which is a IC 555 device. This indicates that each time it is activated, it produces a single pulse. In the […]
Sensors and Detectors
Simple Darkness Detector Circuit
An LED is turned on by a light dependent resistor LDR in a simple darkness detector circuit when it becomes dark. In the circuit of a voltage divider, the resistor and the LDR are linked. Because of the low voltage at the transistors base in strong light, the transistor remains off. As night falls, the […]
Motion Detector Circuit using IC 555
This simple design for a motion detector uses an IC 555 to detect human trespassing from a distance. Usually, there are two major components to this circuit: Transmitter: The IC 555 is used in this part as an astable multivibrator, in other words it produces a constant frequency specific square wave. This high frequency beam […]
Simple Non-Contact 220V AC Detector Circuit using IC 555
It might be dangerous to tamper with electrical cables, particularly if you are unfamiliar with electronics, if not used properly electricity may be hazardous. Therefore, being secure is crucial! to prevent injury, you should determine whether there is any residual electricity (leakage voltage) before handling electrical lines. Using a IC 555 chip and other common […]
Broken Cable Detector Circuit using IC CD 4069
A circuit that can help you identify breaks in wires without needing to physically expose the wires themselves. That is a broken cable detector circuit, it works like a metal detector for wires, but instead of metal it sniffs out AC electricity around the wire. The circuit uses a special chip called a CD 4069, […]
Simple TV Remote Signal Jammer Circuit
The 555 IC is used in a TV remote signal jammer circuit to mislead the TVs infrared receiver by continuously generating an infrared pulse at the transmitters carrier frequency. You can watch your show uninterrupted since this interference stops the TV from receiving remote control signals. An IR LED, a ceramic capacitor, an NPN transistor, […]