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Update 'Future Modules'

gdorn 2022-09-01 02:12:19 +00:00
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Future-Modules.md

@ -4,13 +4,22 @@ What we build next?
Pretty confident we do these in this order next.
## Sequencer
#### Baby 8
#### MK's 5-step sequencer, expanded to baby 8
* Breadboard MK's 5-note sequencer.
* Compare to online 8-note sequencers (baby 8)
* Either build online 8-note schematic, or extend MK's 5-note to 8-note.
* padding MK's out to 8 notes means roughly $16-20 in parts, depending on PCB choice
#### Bergman's 10-step sequencer
* can do up to 10 steps with the hardware to support it
* 10-step mode is ~$16 in parts, depending on which are actually needed
* big board, requiring one 8-pin, one 14-pin and one 16-pin IC
* maybe more stable than MK's? test this
* includes weird 8V linear regulator for the hex inverter - maybe save a bunch of effort and pins by using a single tl074, with two as needed and one as schmitt trigger?
## VCF
#### MK's Diode Ladder VCF
* ~$8 in parts, two tl074 op amps and otherwise a bunch of diodes and support
@ -27,7 +36,25 @@ Less confident about the order or selection of these, though we do know we need
## LFO
Lots of options for this one, but many people have at least two LFOs anyway.
## Quantizer
Something to take CV in, round it to the nearest 1/12th of a volt (or whatever, if it's digital), and send it back out.
#### Arduino + DAC
* https://www.youtube.com/watch?v=t3kUPjdiq0o for explainer
* https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file
* uses an arduino nano (other options probably fine), two 74HC595 shift registers (accidentally a pile in my collection) and the MCP4922 DAC (others may work).
* Probably can build our own based on this and/or Hagiwo's quantizer, if going digital
** https://www.quinie.nl/hagiwo-quantizer-how-does-it-work-a-bit-of-background/
** https://note.com/solder_state/n/nde97a0516f03
** arduino nano clone (atmega 328p), 12-bit dac (mcp4726) and small amounts of supporting hardware
#### MK's quantized arpeggiator
* could extract just the quantizer part
* needs a TLC7524/AD7524 (a simple DAC that's still sorta analog) and a tl072
* arpeggiator needs a 4040 binary counter, but separated quantizer might not
* https://www.youtube.com/watch?v=3v1yTFsypqA
## Sample & Hold
#### MK's S&H, though maybe move the noise generator to a separate module? If possible?