suessspeise / sdiy

schematics and protoboard layouts for synthesizer modules

SDIY

This repository contains layouts for proto board adaptions of freely available circuits from Niklas Rönnberg (nor), Nonlinearcircuits (nlc), Skull&Circuits (skull), David Hailant (hailant), Barton Musical Circuits (bmc), Ken Stone (cgs), aiynthesis (aisynth) and myself (invest).

Filter and Resonance

• cgs30_bandpass, bandpass filter with option to stack for multiband filter
• nlc_buchlaLPG, Low pass gate
• skull_vcf-1, vactrol based VCF, works well as a LPG.

Modulation

• nlc_triad, dual AR envelope
• nlc_sloth-basic, chaos oscillator LFO
• nor_pseudorandom-lfo, mixed suare waves giving pseudorandom CVs
• hailant_lfo-1.4, basic OpAmp LFO
• skull_VCA1, cheap and simple transistor based VCA
• miaw_40106bank, just 6 unipolar LFO square waves
• nlc_jerkoff, chaotic oscillator LFO

Sequencing

• nlc_arseq, 4 step sequencer, each step with attack and release

Mixing and Amplification

• befaco_inamp.svg, added a unity gain mixer
• befaco_outputv3.svg, headphone and stereo out amplifier
• bmc054_stereooutput.svg, panning mixer
• ai008_matrixmixer.svg, in a 32HP 7x5 Matrix version. simple schematics, lots of wiring
• skull_attenuvert, 4 attenueverters
• IIIIIIII_nearness.svg, minimal unity gain panning mixer
• ncs_trannymixer.svg, simple transistor based mixer

Utility

• nor_clock-divider, 4024 based clock divider
• bmc069_gate2trigger, gives triggers on rising and falling edge
• nor_trigger2gate, with settable gate length, 555 based
• bmc079_risefalldetector, generates gates, indicating if an incoming singal is rising or falling
• invest_555clock-multiple, multiple with a clock source normaled to the input
• nlc_bools, logic module, logic type interchangable + stepped sequence and slew limiter
• nlc_diffrect, differential rectifier...
• skull_multiple, dual 1 to 3 multiple with LED
• cctv_gates.svg, passive vactrol VCA with switchable lowpass filter
• karpuz_slew.svg, slew generator

Waveshaping

• nlc_dualneuron, two neurons in one unit (for the sake of using all OpAmps)

Sound Source

• nor_colourednoise, white, pink, red and blue noise, based on transistor reverse break down
• nlc_ota-vco, (not working properly)

Percussion

• nlc_vactrol-pill, 4046+vactrol
• nlc_bong0, twin-T with a LED as nonlinear resistor
• miaw_smurfdrum, passive drum with fart sounds

Effects

• nlc_nulla_delay, simple PT2399 delay
• nlc_delaynomore.svg, glitchy delay feedback loop
• rlf_monotropav3.svg, 4 frequency band overdrive distortion

Misc

• invest_eurobus, busboard with cheap 5x7cm proto board
• invest_little-speaker, just a drill guide rackmounting a speaker i found at a flew market
• invest_rackdrillguide, a drill guide for rails from reichelt.de