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Controlling a Revox A77 with MCP 5500 or Beolink 1000?

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chartz
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chartz posted on Fri, Jun 15 2012 2:29 PM

Hi,

I'm actually looking for instructions to make an IR adaptor. I know there are ready-made solutions out there but they are ludicrously overpriced for what must be in the box.

So I basically need the PCB layout and the diagram. 

Thanks!

Jacques

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chartz
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chartz replied on Thu, Jun 21 2012 4:54 PM

Nobody then? Sad

Jacques

solderon29
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I've got a drawing somewhere of a converter for Beo 4 to rs232,but what system does the Revox use?I did'nt think the A77 was even capable of remote control?

Nick

chartz
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chartz replied on Fri, Jun 22 2012 7:55 AM

Hi,

The Revox A series have wire remote capacity, not IR. But this was not the RS232 type, just a simple repetition of the onboard functions.

Jacques

chartz
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chartz replied on Fri, Jun 22 2012 3:49 PM

This (but the price is just rip-off): http://www.dailymotion.com/Revoxbeo#video=xglf1y

Jacques

solderon29
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How about using the Lintronic converter?I understand it has assignable relay outputs,so keystrokes from say Beo4,could be set up to close contacts across what must be a very simple remote control with the Revox?This would give you remote control of say,play,stop,wind and record.

Nick

chartz
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chartz replied on Sat, Jun 23 2012 6:13 AM

Not any cheaper really, and I want a DIY project - the kind of project where you have to draw the PCB yourself, then make it!

Jacques

solderon29
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Cripes,a"belt n braces" type job?Brings back memories of bath's of ferric chloride etchant,happy day's!!!

Yes indeed,good as it undoubtably is,the Lintronic kit is horribly expensive.I wonder if they have to pay a license fee to B&O?T

There must be a solution.I'll have a think.

Nick

chartz
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chartz replied on Sat, Jun 23 2012 3:32 PM

solderon29:

Cripes, a "belt n braces" type job? Brings back memories of baths of ferric chloride etchant, happy days!!

Yep, still doing it! I made my first one in 1980... How time flies. 

 

Jacques

Ƨcɑɽɑɱɑnɡɑ
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Jacques,

Check the old site here: http://archivedforum.beoworld.org/forums/p/30209/240509.aspx#240509

Not sure Silou made the jump to the new forum -pretty sure he is the same fellow you have already linked to.

Niche market; likely the only game in town!

  • One B&o bottle opener
  • One fancy gun
chartz
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chartz replied on Sat, Jun 23 2012 4:19 PM

Yes, same guy. But then again, €179 for what it is...

Jacques

solderon29
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What about member Ridax?He used to offer a little board that converted the Tape 2 commands to operate an i.pod.He may be still active and could offer a solution?

Nick

tournedos
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The problem here is that this isn't something you can implement by just soldering stuff together. The IR command decoding is way too complex to implement without a microcontroller of sorts + associated sotware (or an FPGA, but even that would be silly).

Another difficulty is the IR reception. The nice 3-pin single chip solution TSOP7000 has been discontinued for a while now. Unless you can find old stock somewhere, you'll need to build a discrete receiver - which can be dozens of components, see any relevant Beomaster - or use a B&O IR eye, which isn't really cheap either. I believe this is the particular reason why Lintronic has dropped built in B&O reception support in their current model.

The Revox side is probably completely trivial (you ground a pin in a connector for a function, or what?). Apart from the IR receiver, I could probably program the rest in e.g one of these in one evening, but there's not much challenge nor fun left after that - just connecting wires...

EDIT: After reading Nick's post above, of course the IR part of the problem could be ruled over by having the interface gadget on Datalink - after all, you'll probably be playing it into an IR capable Beomaster anyway! But the first issue remains, it'd still require a lot of circuitry unless you use a microcontroller.

--mika

RaMaBo
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Hi,

 

there is an alternative for the TSOP7000. It's the TSOP5700 which is also obsolete now, but might give you a second chance to look for. It's an TSOP7000 in SMD case. The specs are out there in the web.

To 'decode' the received IR-data the  site http://gutwenger.com/beo2pc/beo2pc.html gives some info about the hardware ' IR-> RS232' and the software for the microcontroller can be downloaded. In the ZIP file of the software there's also some information about the codes that are used and how the codes are represented in RS-232.

Sorry the site is only in German, but should be translated via google Translator or something else. This is not my site but from an austrian.

 

The received codes can be processed with an second microprocessor just by getting the data via RS-232 and a nice IF-THEN construct ( or SELECT structure if you like ) does the wanted action. Pull certain Port Pins low or high, send RC5 IR-commands , whistle ring bells or whatever you want.

But you have to use a microprocessor because you get three bytes via RS-232 and have to decide what certain commands you want to react on. You should first download the software and study the files where the B&O codes are described. This gives you an idea how complex the IR data is.

 

With this circuit you can also use an datalink pin of a beomaster /beosystem...  You don't need an IR sensor.

 

Hope this makes it a bit clear :)

 

Greetings from Munich

RaMaBo

 

Ralph-Marcus

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