Hi,
in my last project I used a rotary encoder and... it was no fun. Debouncing was tedious and my code had a lot of overhead.
Now I have found this great little decoder IC:
Has someone experience with this IC? Are there alternatives? Because I can't find it to buy in Germany. Are there rotary encoders with this already built in or break out boards?
Also, I have just bought this litlle DAC and headphone amp:
I would like to replace the volume buttons with a rotary encoder. I think using this IC and a few transistors is a lot more elegant than putting an Arduino in between.
MarkT:
Why the need to debounce a quadrature signal? All transistions are valid.
I mean the hand cranked kind and not and optical one.^^
Well, I got it all working perfectly in the end. But the path there was no joy. I should say, it was for a university project and it had to work quickly. So, problem solving wasn't as fun as it normaly is. Also I had a whole batch of very cheap and broken encoders and figuring that out took me a while.^^
Soo... for me it would be worth it to pay 8$ to save the hassle. If I could find them. Also, with the headphone amp project it would be cheaper than fixing an Arduino to it, just to read the encoder.
MooJuice:
I mean the hand cranked kind and not and optical one.^^
Doesn't matter, still all transitions are valid. And if you have a good state machine it doesn't matter if it bounces a bit between 2 states..
But why didn't you just grab one of the many libraries? Granted, all the interrupt pin versions are a bit crap (bazooka on a mosquito) but there are some decent ones. Alright, granted again, I'm still looking for the ultimate library for it which just uses the PC interrupts.
Well i wouldn't call it a "decoder IC" - It's just a PIC12F508 - $8 for the chip + software is kind of expensive. If you want to button "debouncing" but not use processor time on your Arduino - get a handful of Attiny-chips, write some code and let them do the exact same thing.
Zapro:
Well i wouldn't call it a "decoder IC" - It's just a PIC12F508 - $8 for the chip + software is kind of expensive. If you want to button "debouncing" but not use processor time on your Arduino - get a handful of Attiny-chips, write some code and let them do the exact same thing.
That's a great idea. I Will do that and learning how to program smaller ICs could definitely become useful.
Potentially the only retailer is the manufacturer ELM itself in Canada (found another source in HongKong, but no prices, so you have to ask for a quote).
ELM / Canada is selling the piece in quantities down to "1" for C$8.50 plus C$8.00 for worldwide shipping.
