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PICList Thread
'Part for IR Remote (Somewhat off topic)'
1997\05\12@123334 by Bob Fehrenbach

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About three years ago I designed a unit using an IR remote.  At the
time I used an NEC chip (UPD1620) in the remote.  Worked like a champ.
Recently NEC has made the part obsolete without a suggested alternative.

I have found an SGS Thomson part, M3004AB1, which looks like a candidate
although the encoding is different and the receiver software will have
to be changed.

It would be nice to have some choices here but SGS-T is the only one
so far.

These parts typically include a keyboard scanner, some sort of encoder,
a modulator (usually around 40 kHz) and the IRLED driver.

I suspect that since most of the remotes are made off-shore that few, if
any, parts of this type are imported.  To make things even more
difficult, the volume on this project is relatively low - buy quantities
in the 25 - 50 piece range.

I could roll my own but wheel-reinventing is Plan B.

If anyone has any suggestions I would appreciate it.


Sorry for the slightly off-topic nature.  At present the received signal
is decoded by a Z8 but this would be changed to a PIC in any redesign
so there is a _remote_ relevance.  (Bad pun)

--
Bob Fehrenbach    Wauwatosa, WI     spam_OUTbfehrenbTakeThisOuTspamexecpc.com

1997\05\12@124628 by Miller, Steve

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{Quote hidden}

The cheapest solution to this problem is to buy preassembled universal remotes.
Our local department stores will run specials on these things for less than $10
each.  I cannot build anything for $10 each in the quantities you are quoting.
In several past projects we bought these universal remotes, reverse engineered
one of the manufacturer's encoding schemes, and supplied the remote with our
product.  While not the best solution, it is by far the most cost effective.
Just the plastic case pricing alone will kill you when trying to build your own
remote.

Good Luck.

----- Steve

1997\05\12@154047 by Reginald Neale

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Bob Fehrenbach said:

>About three years ago I designed a unit using an IR remote.  At the
>time I used an NEC chip (UPD1620) in the remote.  Worked like a champ.
>Recently NEC has made the part obsolete without a suggested alternative.
>
>I have found an SGS Thomson part, M3004AB1, which looks like a candidate
>although the encoding is different and the receiver software will have
>to be changed.
>
>It would be nice to have some choices here but SGS-T is the only one
>so far.
>
>These parts typically include a keyboard scanner, some sort of encoder,
>a modulator (usually around 40 kHz) and the IRLED driver.
>
>I suspect that since most of the remotes are made off-shore that few, if
>any, parts of this type are imported.  To make things even more
>difficult, the volume on this project is relatively low - buy quantities
>in the 25 - 50 piece range.
>
>
I believe Philips and Siemens both make this type of device.

Reg Neale

1997\05\12@155934 by Kalle Pihlajasaari

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Hi Bob,

> About three years ago I designed a unit using an IR remote.  At the
> time I used an NEC chip (UPD1620) in the remote.  Worked like a champ.
> Recently NEC has made the part obsolete without a suggested alternative.
>
> I suspect that since most of the remotes are made off-shore that few, if
> any, parts of this type are imported.  To make things even more
> difficult, the volume on this project is relatively low - buy quantities
> in the 25 - 50 piece range.
>
> I could roll my own but wheel-reinventing is Plan B.

Plan B has been done by some.  Aparently one of the largest consumer
remote manufacturers in Europe is also one of the largest PIC16C54
customers.  I expect they use ROM versions for volume but some
top end HI-Fi systems do not have such large volumes.

Generating the carrier is not hard or the modulation.  Keypad
encoding is something that I have not tried but should not be
that hard.

I do agree though that use of a commercial or kit remote is to
be investigated for small runs.  Velleman Kits has a multi function
Remote available as a kit with 16 buttons I think.  Maplin sells their
kits if I'm not mistaken.

Cheers
--
Kalle Pihlajasaari   .....kalleKILLspamspam@spam@ip.co.za   http://www.ip.co.za/ip
Interface Products   P O Box 15775, DOORNFONTEIN, 2028, South Africa
+ 27 (11) 402-7750   Fax: 402-7751    http://www.ip.co.za/people/kalle

DonTronics, Silicon Studio and Wirz Electronics uP Product Dealer

1997\05\12@163218 by Bob Fehrenbach

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Reginald Neale <nealespamKILLspamSERVTECH.COM> wrote:
>I believe Philips and Siemens both make this type of device.

  We have about eight feet of Philips data books and I could not
  find an appropriate part.

  We only have about a foot of Siemens books (which contained
  nothing relevant) so that might be an avenue.  And the Siemens
  rep was just here ....   There must be some sort of law about that.


--
Bob Fehrenbach    Wauwatosa, WI     .....bfehrenbKILLspamspam.....execpc.com

1997\05\13@045714 by gary skinner

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> Bob Fehrenbach wrote:
> About three years ago I designed a unit using an IR remote

I am currently making my own remote system.  The 554 makes a great
keyboard scanner with wake up on port change.  If you use the right
resonator, generating the appropriate modulating frequency is easy.
The hardest part is finding a case to put it all in.

I have found a great source for cases here in Colorado.  I buy 1000
at a time.  The boards are reasonably easy.

If you are interested in my unit, contact me and I can give you more
details, or sell you remotes if you want.

Gary Skinner   EraseMEgskinnerspam_OUTspamTakeThisOuTcsd.net
Electronic Solutions, Inc.
design of custom electronic controls

1997\05\13@065049 by Mohamad Shalan

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I am intersted, please send me more information to
m_shalanspamspam_OUTusa.net

1997\05\13@204321 by Reginald Neale

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>Reginald Neale <@spam@nealeKILLspamspamSERVTECH.COM> wrote:
>>I believe Philips and Siemens both make this type of device.
>
>   We have about eight feet of Philips data books and I could not
>   find an appropriate part.
>
>   We only have about a foot of Siemens books (which contained
>   nothing relevant) so that might be an avenue.  And the Siemens
>   rep was just here ....   There must be some sort of law about that.
>
>
>--
>Bob Fehrenbach    Wauwatosa, WI     KILLspambfehrenbKILLspamspamexecpc.com

It's possible I misunderstood what you are trying to do. Philips makes
several dedicated remote/IR ICs -- check out the SAA3004P xmtr and SAA3049
rcvr chips. The databook also has suggested circuitry.

Sorry if this was not helpful.

Reg Neale

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