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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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27th Jul 2022, 10:26 pm | #1 |
Octode
Join Date: Jul 2018
Location: Worthing, West Sussex, UK.
Posts: 1,005
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Home made Pulse to tone convertor
This may be of some interest, I just found it after considering buying a 746 phone in a charity shop.
https://www.mattmillman.com/projects...one-converter/ |
27th Jul 2022, 11:24 pm | #2 |
Octode
Join Date: Jul 2018
Location: Worthing, West Sussex, UK.
Posts: 1,005
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Re: Home made Pulse to tone convertor
Once again a spelling mistake, should be CONVERTER with an E, I despair at my rushed typing sometimes.
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28th Jul 2022, 12:18 am | #3 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,725
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Re: Home made Pulse to tone convertor
Yes I made a few of the forerunner of those. I was trying to get the first one going for about six months on and off and had practically given up, when by chance I saw this by Joe ThePillenwerfer
https://www.vintage-radio.net/forum/...d.php?t=135674 I managed to understand Joe's instructions and it got me into programming the ATtiny85, I have since used them for other projects too. Here is my final version, it's a good deal neater than my prototype. The two boards form a sandwich in the case. I was aware of the Matt Millman code and simplified hardware, but I haven't tried it.
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-- Graham. G3ZVT Last edited by Graham G3ZVT; 28th Jul 2022 at 12:33 am. |