Use a vintage rotary telephone dialler to enter values into your Arduino sketch
This won't dial a telephone number but can be use for any project where a single digit number can be entered - an ideal retro replacement for a matrix push button pad, for example.
I spotted this on eBay (they do come up occasionally for a reasonable sum, and more frequently for an extortionate amount) and thought "I wonder what I can do with that?"
Well, I'm still wondering, although I have got it working 100% reliably with all the switch bounce problems sorted with a very simple hardware solution from Jack Ganssle. It's worth looking at and thinking about, especially if you have problems with switch bounce and are fed up trying to solve it in software.
All links can be found here:
github.com/RalphBacon/Telepho...
OR, individually:
A Guide to Debouncing - Part 2, or, How to Debounce a Contact in Two Easy Pages, Jack Ganssle
www.ganssle.com/debouncing-pt2...
The complete PDF from Jack Ganssle, well worth reading, is in my Github and here:
www.eng.utah.edu/~cs5780/debou...
Page 19 is the key circuit, really simple but 100% effective!
Fascinating insight to how telephone diallers work
www.britishtelephones.com/howd...
The demo sketch I used is in the Github. It was based on an old sketch from the Rotary Encoder video!
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Негізгі бет Ғылым және технология #98 Telephone Dialler ☎️ and Hardware Debounce Solution (retro)
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