radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.
 

Frequency Readout

Moderators:
Ernst Erb Martin Renz Vincent de Franco Miguel Bravo-Cos Mark Hippenstiel Alessandro De Poi Heribert Jung Bernhard Nagel Eilert Menke Dietmar Rudolph † 6.1.22 
 
Please click the blue info button to read more about this page.
Forum » In General » Frequency Readout
           
Lars-G. Lundelin
 
 
FIN  Articles: 136
Schem.: 31
Pict.: 111
14.Mar.09 19:32

Count of Thanks: 5
Reply  |  You aren't logged in. (Guest)   1

Dear Radio Friends.
I got, a while ago, from a colleague an electronic kit presented in the 6-7/89 issue of the Swedish version of the Elector magazine. This friend of mine bought this kit from Germany in 1989 through the german Elector issue, but he did never even open it until I begun assembling it. This is a “Frequency counter display for radio receiver equipment”. The kit had several serious faults but the biggest one was, I couldn't get it working because of wrong components.  
When all hardwork was finished and I started the tests, I could only see a row of dashes.
There are eight 7-segment displays and they showed all the d-segment. I knew I hadn't done any mistake in the assembling, so I started to look after component faults.
Yep,..of course you begin with the counter itself and --- bingo---, I read from the IC; ICM 7217 AIPI. Here it should be: ICM 7217 or ICM 7217BIPI.
 The ICM7217AIPI is for common Cathode and the ICM7217... is for common anode..
Well, the friend of mine did never know he bought shit for a quite a high price.

Well, now to the question: Is there anyone who knows where to get this spec counter ICM7217 or ICM7217BIPI with common anode?.
I need two of them.

Kind regards

Lars-G.


 

This article was edited 14.Mar.09 20:13 by Lars-G. Lundelin .

Till Krüger
 
 
D  Articles: 41
Schem.: 78
Pict.: 30
17.Mar.09 08:19

Count of Thanks: 9
Reply  |  You aren't logged in. (Guest)   2

Dear Lars-G.Lars-G.

see heere and smile:

http://darisusgmbh.de/shop/advanced_search_result.php?XTCsid=560cdd0fa02e115b48ad8616a8da81ab&XTCsid=560cdd0fa02e115b48ad8616a8da81ab&keywords=CM7217&x=5&y=8

regards from germany

T.Krueger

 

Lars-G. Lundelin
 
 
FIN  Articles: 136
Schem.: 31
Pict.: 111
17.Mar.09 12:03

Count of Thanks: 5
Reply  |  You aren't logged in. (Guest)   3

Thanks a lot T.Krueger for the hint.

This will surely help me sleep well again. I couldn't really find this site when I googled for the chip. In Honkong they offered me the chip but they wanted me to buy hundreds of them.
 

Regards with a big smile.

Lars-G.

 

  
rmXorg