RS-232 Infrared Receiver in a Serial Connector (LIRC) Computer Remote Control

Step 3 Circuit Walkthrough

First of all, I'm going to try to avoid telling you to solder pin1 to pin2, and give you more english directions. The problem with this is that english is ambiguous, just ask any computer scientist : )
The only component I will refer to by pins is the 9-pin serial connector because I gave you a pretty diagram in the last step so everyone should be able to figure that out.

So, in order to try to make the english explanation less ambiguous I'm going to set out a few rules.
1) I will say that a component is 'on its back' which will mean the following:
a) The IR receiver is 'on its back' when the rounded receiver side is up and the flat side is down.
b) The voltage regulator is 'on its back' when the totally flat side is down and the two level side with printed letters is up.

Here we go:
1) Solder the dark side of the diode to pin7 (RTS) on the serial connector, that is the stripe indicating direction will be on the opposite side of the diode from the serial connector.
2) Solder the striped end of the diode to the center pin of the 7805 voltage regulator
3) Solder pin 1 on the serial connector to the resistor.
4) Solder the other end of the resistor to the left-hand pin on the 7805 voltage regulator assuming the voltage regulator is -on its back-
5) Solder pin 1 on the serial connector (where we just connected the resistor) to the right-hand pin on the TSOP1138 IR receiver, assuming the receiver is -on its back.-
6) Solder pin 5 on the serial connector to the negative side of the capacitor
7) Solder the positive side of the capacitor to the center pin of the TSOP1138.
8) Solder pin 5 on the serial connector (where we just connected the negative side of the capacitor) to the left-hand pin of the TSOP1138 (assuming its on its back)
9) Solder the center pin of the TSOP1138 (where we just connected the capacitor) to the right-hand pin of the 7805 voltage regulator, assuming the voltage regulator is -on its back-

Keep in mind that several points will have multiple connections. For example, the center pin of the TSOP1138 connects to the positive side of the capacitor as well as the right-hand pin of the 7805 voltage regulator, assuming the voltage regulator is -on its back-

Okay... so that's really, really nasty and I would never figure how to build a circuit like that... but perhaps it will help someone who doesn't read circuit diagrams very well.

Comments

[tajmohd15]

Hi,

which remote control should be used to this RS-232 Infrared Receiver in a Serial Connector (LIRC) Computer Remote Control.


is it a universal Infrared Receiver


please reply me

[darc]

Any remote that transmits an IR signal at a receivable frequency should work. I used a 38kHz IR receiver and that's pretty standard (as is 36kHz).

Personally, I've used this receiver with an RCA Universal Remote (model RCR815) the most and it works great. I've also tested it with the remote that came with my Logitech PC speakers (5.1 with 10" sub... I forget the model number), my old Sanyo DVD player remote, and a few other remotes from various devices in my home. They've all worked (in that the receiver picked up a signal) but I didn't bother to map the output from the remote to an action in LIRC on all of them... I just wanted to see if they'd pick up. The RCR815 is the one that I've used the most and is the only remote that actually gets used in my house.

Remember that you'll have to configure your receiver software to make it actually "do stuff" but that the receiver will pick up the signal from a ton of different remotes/input devices.

Good luck!

[tajmohd15]

can u please tell me how to make in usb version

[darc]

I'm just going to copy/paste this reply from further down because I'm lazy : )
-----------------------------------

There are USB alternatives, but they're a little more complicated because you have to interface with the USB controller... which is trickier than the serial controller. Because of that, you'll have to have some type of IC or MC to do the communication between the IR receiver and the USB bus. And, with the added hardware, your cost will raise a bit. Of course, I built my serial receiver for about $1.50 ... so "rising cost" may come up to $5, probably less than $10... depend on the IC/MC you use.

Check out these projects for more info, and for a schematics/plans:
USBTiny : http://www.xs4all.nl/~dicks/avr/usbtiny/

USB-IR-Boy : http://usbirboy.sourceforge.net/

I'm sure there's probably a few more projects out there, but these are the two I hear about the most often.

[tajmohd15]

in usb Cant we connect

DCD to red wire
RTS to white or Green wire
GND to Black wire

[darc]

I've never looked at the USB options in depth, but if you're talking about wiring the IR receiver directly to USB wires without a microcontroller... I don't think that's going to work out for you.

[tajmohd15]

in usb Cant we connect

DCD to red wire
RTS to white or Green wire
GND to Black wire

[infraredman21]

Well, hello there i'm Chris i'm a big computer junky my self but the only computer that has that seral port is very old my new computer only has usb, now do you thing we could make one thats a USB??

[dleite]

You could do a USB one from scratch, ( I was able to get my XBOX DVD Remote to connect to Linux via LIRC). A simple solution may be a USB to Serial device and driver.