#Not-working modules
- Sequencer (currently troubleshooting it)
#Presumably Working Modules
- Auduino 2
#Work in progress Modules
- Clock/Frequency Divider
- LFO
- Auduino 1
- Auduino 3
- Atari Punk Console
#Modules i'll make soon
- VCO
- Arduino VCO
#Plans for a diy modular synth Here is the current version of the plans I've been working with. I wrote em for myself, so they might not be very useful for others.
- close to 4U: 180 mm
- module width will be x*10mm, so far smallest is 30 mm
- front panels will be 2.7mm high
- standard pot knobs are ....... mm in height
- CV and audio both on banana jacks
- folding box with piano hinge, collapsible feet and removable back panel?
- serge modules might fit, though i might have to do minor adjustments to my cases
- front panels and pot knobs will be made from 2.7 mm plywood using a lasercutter
- front panel design will incorporate arrows and curves to signify what knob/plug does what
- so far, i've mostly used the "Arial" font on frontpanels
- maybe:
- standardized rectangular wooden format with dovetails and a back?
- make these 200mm * x00mm in outer dimensions, with a standardized inter-connection system?
- same format as modular book cases i plan to make?
- threaded inserts?
- wooden pegs?
- wont use rails, but screw directly into the wood?
- use desktop power supply, optionally decased?
- chinese step up/down converter
- diy powersupply
- 5
- 15
- -15
- maybe:
- 9
- 12
- So far, i've made a power bus out of bare copper wire with 3 connections (intended for gnd, +5 and +15 v), but i can easily add a fourth and fifth power line
- x4046
- 555-based
- stepped VCO
- sync out
- triple vco with one input and with an attenuator each at the point where exp voltage has been generated: this would be an oscillator with undertones
- 555-based
- opamps?
- VC?
- 4017 and opamps
- Dual or triple channel
- Add a lfo for clock, allow one of the channels to be used as an input for the lfo clock allowing for configureable step length
- blue pill, step length, direction, ping-pong, multi/single gate, normal length,
- 4017
- 4017
- max clock frequency = 2mhz @5volt, 6mhz @15volt
- 4046
What you need is a Phase Locked Loop. There is a 4046 CMOS IC that implements one, but you also need a digital divider so you could build a phase comparator and use a synthesizer VCO. The principle is to divide the VCO output down by the ratio you want and then compare the phase with your input signal. The phase comparator produces a CV that makes the VCO track the input frequency at a multiple set by the divider. The simplest is an XOR gate followed by an RC filter, but there are better more sophisticated circuits. The 4046 has two alternatives.
CD4046 application report
Or just Google "Phase Locked Loop"...
See "Clock Multiplier", but with a higher frequency
- 555-based
- http://schmitzbits.de/adsr.html
- yusynth adsr
a basic ac-dc converter, outputs the dc voltage of the peak (the amplitude) when given an ac waveform
cap and inductor
- most popular in modular synths
- passes low frequency content
- moog's version: ladder filter
- passes high frequency content
- can be seen as a phase shifter
- changes phase based on frequency
- popular sound on guitars
- when summed with input signal, the frequency-parts that are 180 degrees changed will negate eachother
- auduino granular synth
- ginko modular grains
- blue pill
- quantizer
- inspired by ardcore
- midi to cv converter
- http://playground.arduino.cc/Main/ArduinoSynth
either:
- cv-adder (with maybe an internal VCO)
- or frequency multiplier and divider, optionally combined with external or internal waveform changer
Could turn into a modulator when CV-ed and supplied with either the output of an LFO (probably quantized)
or the output of a sequencer (also probably quantized)
- Basically a Chord Maker with a changing interval
- Could also have an option to switch different inputs to an output rapidly
- External clock?
- Decade counter?
- either:
- cv-adder (with maybe an internal VCO)
- or frequency multiplier and divider, optionally combined with external or internal waveform changer
TODO: Look into what changes/shapes waveforms Triangle is useful for frequency multiplication
TODO: See whether this is useful, what an implementation would be, whether just a cap in series inbetween the in- and output would suffice so it'd be useful
- has been done before: https://www.muffwiggler.com/forum/viewtopic.php?t=183581
- negation, sum, difference, integration, multiplication, etc
Buy Chinese oscilloscope kit on aliexpress, make new front panel Maybe change firmware? Sell as kit? Could maybe be used as tuner, with changed firmware
arduino?
- What CV/sound levels will I even use?
- polyphonic
- speed/force-sensitive
- gate output
- digital scanning
- pressure-sensitive
- gate output
- polyphonic????
- also known as:
- linear controller
- stringer
- YEEEESS
- trautonium
- hellertion
- crea-tone
- oscillion
- emiriton
- No clue what this is, apparently useful for synthesis
- YM2413: same thing, but you can only configure settings for all voices at once
- Use a kit? (20 dollars + shipping costs)
- CD40106
- CD4093
- 4017 (baby8)
- dual 4017, with 16 steps
- frequency divider with a mux
- sliderpots
- exponential pots
- other jacks
- switched jacks
- rotary switches
- YM3812
- YM2413
- YMF262
-
Electronic Music Circuits, chapter on filters
-
Analog days, page 149 ext, 132 int
-
Wireless World, the circuits by Tim Orr