This simple circuit allows you to record any IR remote control signal on your PC, and then play it back. This is particularly useful if you want to control appliances such as TVs, VCRs, CDs etc. from your computer. The device simply connects to the parallel port of your PC. You can also use this [...]
Thank. Source Selected frequency acoustic remote control switch circuit using 74LS74
Other circuits
Infra Red Switch with 555 and 74LS74 Any “button” of any remote control may be used to work this universal switch. The button must be pressed for about one and a half seconds (determined by R3 and C2) before the relay will [...]
This be simple bounceless switch circuit, In the character electronic switch a kind is one. That be of good quality tall and low noise convenient for the digital. If switch usual apply to digital circuit like to to get into trouble promise disturb easy. It make the circuit works can make a mistake. This circuit [...]
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