Endless potentiometers:
Also known as 360 degree pots - carbon potentiometers without an end stop. Alpha has one that has two carbon paths, making it possible to sense position and direction, and the paths have no jump in resistance at the end but rather increase then decrease. Can be used if we want more steps than an encoder can offer.
Lifetime for both pots and encoders from Alpha is 15000 turns.
One example is Alpha RV112FF
https://hackaday.io/project/171841-driveralgorithm-for-360-deg-endless-potentiometer
https://forum.arduino.cc/index.php?topic=531613.0
IDEA: For filter, use a "finger dial" like the data wheel on the Native Instruments KORE 2, with an option to do a fine grained sweep by pressing "shift" (this could really be an option for all pots, with a common shift somewhere).
Encoders:
24 pulse/24 detent https://www.reichelt.com/de/en/alps-stec12e-rotary-pulse-encoder-24-24-vert-w-pb-stec12e08-p73923.html
Alternatives (like without detents):
https://tech.alpsalpine.com/prod/e/html/encoder/incremental/ec12e/ec12e_list.html
Each detent may give up to 4 increments when using a non-detent encoder. More info on this and on how to read multiple encoders using interrupts (and port expanders) here:
http://makeatronics.blogspot.com/2013/02/efficiently-reading-quadrature-with.html
https://www.eevblog.com/forum/beginners/rotary-encoder-pulses-and-detents-and-interrupts-vs-polling/
https://arduino.stackexchange.com/questions/52909/reading-several-rotary-encoders
LED ring:
Must decide if all or only one led is lit. Measure current used.
Can use a 7-segment display chip like the MAX7221
Light pipe solutions:
Laser cut a black ring with holes the size of the led. Put a diffused (engraved acrylic or milky white acrylic) and colored acrylic on top - will give clearly separated leds.
CNC a ring with holes, but slant the edges so they meet at the surface, will give minimum separation. May be a problem that viewing angle of the led does not spread the light enough.
Experiment with diffuser at top/bottom for increased spread
3D-print similar ring with slanted edges? Laser cut the bottom hole?
Make light pipes with separation, laser cut as a profile and mounted upright, will make it possible to have slanted edges in one dimmension,. with good internal reflection (?)
My initial tests of light pipes: https://atosynth.blogspot.com/2020/04/led-dial-light-pipes.html
A cool project with RGB ledring: https://muffwiggler.com/forum/viewtopic.php?t=217920
Knobs
White moog/boss style knobs:https://lovemyswitches.com/knobs/?utm_source=share&utm_medium=ios_app
https://lovemyswitches.com/colored-boss-style-knob-knurled-shaft-11-x-20mm/
https://lovemyswitches.com/colored-boss-style-knob-1-4-smooth-shaft-11-x-20mm/
https://lovemyswitches.com/1360-tall-boy-knob-12-x-16mm/
Also has lots of other sizes but not white
Cheaper kn-13560 knobs: https://www.aliexpress.com/item/32430188458.html
https://www.conrad.com/p/alps-dk13-164a645-rotary-knob-for-encoder-with-plastic-shaft-rotary-button-700619
Switches
Cherry ML: https://cory.li/cherry-ml/
Nord Lead - switches: https://www.elektronauts.com/t/nord-replacement-switches-part-id-now-found/46469
--> 6450 Marquardt
Cherry MX Low Profile
Make the front panel detachable and use an RJ-45 to connect it to the synth, making it desktop friendly.
Other ideas:
Make the front panel detachable and use an RJ-45 to connect it to the synth, making it desktop friendly.
Morph functionality. Set A, set B (either patch or variation of patch). Big dial for morphing. Envelope based morph.
CNC'd mod wheels with acrylic inside?
No comments:
Post a Comment