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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. Pretty confident we do these in this order next.
## Sequencer ## Sequencer
#### Baby 8 #### MK's 5-step sequencer, expanded to baby 8
* Breadboard MK's 5-note sequencer. * Breadboard MK's 5-note sequencer.
* Compare to online 8-note sequencers (baby 8) * Compare to online 8-note sequencers (baby 8)
* Either build online 8-note schematic, or extend MK's 5-note to 8-note. * 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 * 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 ## VCF
#### MK's Diode Ladder VCF #### MK's Diode Ladder VCF
* ~$8 in parts, two tl074 op amps and otherwise a bunch of diodes and support * ~$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 ## LFO
Lots of options for this one, but many people have at least two LFOs anyway. 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 ## Sample & Hold
#### MK's S&H, though maybe move the noise generator to a separate module? If possible? #### MK's S&H, though maybe move the noise generator to a separate module? If possible?