Re: ir transmitter update

["Frank Mc Alinden" <armagh@xxxxxxx>]

Hi Ian

    it was part number 585-292 in the April 2001 Australian version of catalogue. They cost  approx $6.00 about 2 pound + fifty pence each . Not as cheap as the standard 4n25 - 28 but necessary for the 38khz carrier. BTW  Ian i tried to purchase the schematic software on line and all i could see to purchase was the shareware stuff .? How did you go with the pcb pool people any joy ?

 

Frank

----- Original Message -----

From: Ian B

To: ukha_d@xxxxxxx

Sent: Saturday, June 08, 2002 9:58 PM

Subject: RE: [ukha_d] ir transmitter update

Great link for the 232 to 485 circuit. I have everything except the opto chips so I'm off to RS on Monday. What was the RS code for the chips you bought? I'm sure you mentioned it but cannot find it anywhere.

 

Thanks

 

Ian

-----Original Message-----
From: Frank Mc Alinden [mailto:armagh@xxxxxxx]
Sent: 08 June 2002 04:17
To: ukha_d@xxxxxxxSubject: [ukha_d] ir transmitter update

Hi all

        Just a quick update on the 8 Zone ir Transmitter prototype. Well high speed optos arrived yesterday

(friday afternoon) got home early from work so it was off to the shed . Who said electronics was fun ( i think i did) well it is but sometimes frustrating as well ,i couldnt get it to work,downloaded the data sheets from the manufacturer ,which to me was different from what RS had in their catalogue.

    Anyway today was a lot better . Searched the web and found a schematic which used the opto im using.

Tried and bingo it worked . Have installed the opto and additional components into my prototype and tested with Homevision . Have saved ir signals from my tv and dvd eg vol up and vol down . All appears ok so the Home Vision signals are now all opto isolated... Next is finish schematics and send off to Ian B for acrobat conversion and then hopefully on my site....

 

Frank Mc

 

ps the circuit i looked at was a PC  (rs232) to RS485 opto isolated FULL DUPLEX CIRCUIT. It even had a picture of the pcb .

http://www.kmitl.ac.th/~kswichit/PC485/PC_Rs485.html

 

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