Free Simple Circuit Diagram
This relay circuit is controlled by almost any type of infrared remote controller. This circuit works on assumption that almost all remote controller use high frequency modulated infrared light. By filtering out un-modulated or low frequency modulated signal, this circuit will be able to remove any interference from ambient infrared light coming from other sources such as sun light, soldering […]
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Most cases of infra-red remote control failure can be detected by detecting the absence of the pulsed transmitted infra red light. It’s very rare that the remote control fail while it is still capable of transmitting the infrared pulse. This condition enable such a very simple tester is easy to build. A simple infrared detector with ac coupling and simple […]
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Infrared transmitter and receiver circuit shown in the schematic diagram below can be used as remote control. The transmitter is basically an oscillator circuit, and the frequency can be adjusted using R1 potentiometer (or trimmer pot). This oscillation makes sure if the signal can be distinguished from other source by the receiver. The receiver is actually a bandpass filter which […]
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This is a TV Remote Control Jammer circuit. Remote control use modulated light to combat eer infrared nvironment/background infrared noise. Your room heater, sunlight, incandescent lamp, and many other devices emit infrared. Without modulating the infrared carrier, other source of infrared will block the remote control signal, since the othsources are mostly strong enough. Since the remote control transmit IR […]
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