2 frequence ranges with self built IR receiver (TSOP17XX) ?

[Sancc]

Hi,
I want to use 2 devices with different frequencies with my Ir receiver - a remote control(~38 khz) and an ir keyboard (~56 khz) . Is it possible to use 2 different Tsops (tsop1738 and Tsop1756) parallel wired on the same port ?

regards,
sancc

[Marsupial]

I've tried to use an IR keyboard with 2 homebuilt devices - the LIRC and the USB version of the IGOR receiver.

I might be wrong, but according to my findings, an IR keyboard always sends more then one code to cover the full key spectrum, mouse, status...

Mine sent 4 IR codes every keypress, and I would have to decode the sequence in order to get the understanding of what was pressed, which is more then annoying.

I changed my mind about using one of those IR keyboard within my hoimebuilt receiver and got myself an RF wireless keyboard instead, but that's just me.

Anyway, if you use the receiver that goes with your keyboard you'll be able to use girder's keyboard plugin for it.

also, for 56khz devices, you could ask john rhees about his USB-UIRT that IS covering this frequency, maybe he had in mind keyboards usage when he designed it..?

http://home.earthlink.net/~jrhees/USBUIRT/

anywaym hope this helps. Good luck

[Sancc]

thx

[Qquazil]

Hey Marsupial, could you post a list of parts numbers needed to build the USB Igor. I am planning on building this but Im not sure where to buy parts for it. Even a partial list (resistors and capasitors) would be apreciated :D

[Marsupial]

you'll need a chip programmer for atmel, and a IR device. all is shown by Igor on his site (http://www.cesko.host.sk/IgorPlugUSB/IgorPlug-USB%20(AVR)_eng.htm)

I decided to use the at90s2313 since I want to use some of the io pins for leds... using the other atmega would be a little cheaper but everything else is the exact same.

the part list:
12 Mhz crystal
TSOP1738 compatible component
AT90S2313 (or AT90S2323 to loose the expansion)
4.7 uF cap
10 uF cap
100 nF cap
100 ohm res
1.5K ohm res
USB connector

to build a at90s2313 programmer, you'll need another crystal and a DB25 connector, plus a socket for the chip.

The most expansive part was the USB connector to the PC, as some res/cap I "recycled" and I already had a IR sensor from the previous IGOR-like device (LIRC)... the AT90S2313 is not very expansive, less then 10$ if I'm right.

with the USB version, the driver is a shareware, and Igor will register you for like 5$, but all it does is pop a screen within loading and unloading... its not annoying.

I asked him one or two questions when building the device, and he cooperated a lot, even if english is not his preferred language ;) (I understand this - its not mine either)

hope it helps.

[Qquazil]

Thanks, i really apreciate you replying. Now i can go and order the parts today :D .