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Tuning controll knob

Posted: Sat Mar 17, 2012 5:31 am
by djmasterg
Question straight to Jeff:

Is it possible to use some kind of potentiometer for tuning, that has no limit - you can turn it around, and to select the station - you could use a push action, or it could be step potentiometer. I am not that much into electronics, as I am into open source, hence my question.

Regards
Greg.

PS. The reason for that is I have like 20+ radiostations and the knob is getting very sensitive. Maybe I should change it to different one with other resistance?

Re: Tuning controll knob

Posted: Sat Mar 17, 2012 11:03 am
by djmasterg
Maybe something like this will be good for a large list of radiostations http://www.ebay.co.uk/itm/10K-ohm-103-m ... 230f8dee0f

Re: Tuning controll knob

Posted: Sat Mar 17, 2012 11:25 am
by mightyohm
You could use something like that.

I originally envisioned the radio having a small number of station presets, around 10, and this works well with an ordinary pot.

You could use something called a rotary encoder to send pulses to the microcontroller, and use software to interpret the pulses and select a station from an arbitrarily long list. I think at least one of the projects discussed on this forum used a rotary encoder in place of the potentiometer I used, there might even be some code available...

Re: Tuning controll knob

Posted: Sat Mar 17, 2012 12:20 pm
by djmasterg
I will try to find some code over here, but also I found http://www.instructables.com/id/Standal ... ino-Power/