I need to know a driver IC for an IR receiver circuit.
There are four switches at the transmitter end. I want to use a single IR transmitter/receiver to send one signal from one of these switches at a time. The IC should then be able to activate the right operation corresponding to that switch.
Hi, Jamshaid. It's a little more complicated than that.
A standard system would have a PIC or other microcontroller on the transmitting end to read the switches, and convert that into a serial bitstream. It would then output that digital data on a 38KHz carrier frequency to an IR LED with a transistor to amplify the current to 20mA or so.
On the receiving end, you'd have a separate IR receiver module with a
38KHz filter, whose output would go to another PIC or uC to decode the serial bitstream, and send the output to relays or digital outputs.The easiest s.e.b. way to do this would be to look at one of the many kits available. One good choice would be the Velleman K8049 15-channel digital IR transmitter, and the K8050 15-channel digital IR receiver with 15 open-collector outputs. These outputs can be used to drive small relays.
If you look at the docs on these kits, you can see this is exactly the way the Velleman kit works.
On the transmitter side, you can remove the pressure switch rubber, and hardwire your momentary switch contacts directly to the board. On the receiver side, the ULN2803s can directly drive small 5V relays. Hook one end of the coil to +5V, and the other to the ULN2803 output.
If this doesn't do it for you, possibly you could describe what you need in more detail.
Cheers Chris
Sorry -- here are the links:
Good luck Chris
Try the Holtek 12A/12D transmitter/receiver combination. These chips take care of the 38KHz modulation/demodulation of the IR too.
I tried the Holtek website this morning but it's painfully slow
Alternatively, there are data sheets here -
Encoder
Decoder
Good luck.
Have something to add? Share your thoughts — no account required.
Ask the community — no account required