3 ms·
> but I'm not sure you can really make a knob that works accurately for both 30 seconds and 30 minutes. Not terribly difficult. An encoder and software to hand
by SAI_Peregrinus 3y ago
> but I'm not sure you can really make a knob that works accurately for both 30 seconds and 30 minutes.
Not terribly difficult. An encoder and software to handle "acceleration". Move the knob slowly, and it steps by a small amount (say, 30s). Move the knob quickly, and it jumps by more per degree of change. My main camera lens's focus works like this, and it's great. This does require care in implementation, getting the acceleration curve right is hard.
- Zarel 3y agoYes, most microwaves with dials do in fact work like this. Compare the the distance between 0 and 1 with the distance between 5 and 6 on this microwave: https://www.amazon.com/Panasonic-NE-1025F-Silver-Commercial-Microwave/dp/B00ZTVIPZ2/ https://www.amazon.com/Panasonic-NE-1025F-Silver-Commercial-...
- SAI_Peregrinus 3y agoThat's a bit different, it's got graduations on the knob. I'm thinking of a pure encoder-based system, where the absolute position doesn't matter but the change in position (and rate of change of position) do. Think like a mouse scroll wheel, but with acceleration.
- crazygringo 3y agoThat only goes up to 6 minutes though. 30 minutes involves a much more extreme change in distances... and then of course in the speed of the knob as the timer runs back down.