Where would we be without our infrared remote controls? Stuck back in the dinosaur era, that's where. IR remote controls are now built into lots of appliances, ranging from TV sets and VCRs to audio equipment, robots and lights.
This relatively simple design makes it easy for you to add infrared remote control to your latest project or to existing equipment. What's more, it can control up to 10 different functions, which should be more than enough for most applications (usually, you'll only need one or two channels). Each output uses an open-collector transistor and this can be used to switch a relay or even to directly switch other 12V equipment.
The outputs can also be used to drive LEDs via current limiting resistors or to drive optocouplers (eg, to provide isolation from high-voltage circuitry). Heavy current items such as motors and light bulbs will have to be driven by relays. We've made the job easy for you by including diagrams that show all the various options - see Figs.5(a)-5(d).
MAIN FEATURES
Uses a commercial handheld IR remote
10 separate outputs
Outputs can be independently set for momentary or toggle operation
Acknowledge LED
LED indicator on each channel
Transistor output for relay connection
Operates on two different remote codes
12V DC operation
Commercial remote
As already indicated, the 10-channel remote receiver is operated using a commercial handheld remote which can also be used to control your TV, VCR or satellite receiver. Using a commercial IR transmitter vastly simplifies the construction and you also get a professional looking controller as well.
Operation is simple - just press one of the 0-9 buttons on the transmitter to control the 0-9 outputs on the receiver. A momentary output stays on for as long as its transmitter button is held down, while a toggle output alternates between ON and OFF on each subsequent press of the button. An acknowledge LED flashes whenever an IR signal is being received, while 10 more LEDs are used to indicate the status of the outputs.
There, we told you it was simple to operate!
All the parts for the circuit are mounted on a small PC board and this can either be housed in a separate plastic box or built right into existing equipment. The operational range is up to about 12 metres.
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