single Serge negative slew ,pcb layout is tested and working ,print is 300 dpi

Frequency Multiplier from Bulgarian Magazine: Радио, телевизия, електроника 1978-01

A unique signum switch for chaos and hyperchaos  from Sprott's Books and Publication

scenes from my neighborhood .

experimental hardware neurons by Grant Richter of Wiard , pcb layouts are tested and working  ,full schematics of the module can be found on the wayback machine ,the stop/start switch in the schematics is misslabeled and should be connected to groung instead of +V
https://web.archive.org/web/20140810101425/http://www.musicsynthesizer.com/DIY/Grant/grant_richters_synthdiy.htm

edit: i made new double layer version of this layout  with gerber files available here: https://synthesizerunderconstruction.blogspot.com/2024/01/experimental-hardware-neurons-by-grant.html

i

need to make another synth as this box is gone

i admire old tape decks ,nostalgia ..

i realized that some projects are better left unfinished ,simply i can not afford it at the moment ,better to sell it to someone who can 

tape echo 

https://youtu.be/Glu9wA4HjE0

logo and wheel panel ,just a marker and easy

testing a dual crossfader http://synthacks.blogspot.mk/2015/12/xfade-dual-crossfader-based-on-buchla.html  audio inputs work fine with additional 56K resistors ,vactrols 

the first synth i ever bought was old Vermona ,it was working well until it could not be triggered anymore from the keys ,then it went where all broken gear goes ,i wrote to folks at Vermona to get the schematics and fix it ,i got the schematics and it remained in the basenent for years , as the keys are gone it leaves a lot of panel space ,i located the trigger and cv input , the odd vcos react interesting to audio range input ,more .. the " fine" input can be used for just that ,the " briliance" or " real frq " of the vcf would be nice with additional cv's ,first idea for the free space and in order to keep the instrument's caracter is to make a MFOS 32 step seq as it will exactly fit the space too ,here are few images of the Vermona

" She adjusted the controls of a musical instrument that played soft and complicated strains out of it's own creative bowels by striking notes and chords in a random manner ; the randomness weighted in favor of pleasant combinations by intricate mathematical formulae. The music could no more repeat itself then could snowflakes ,and could no more fail of beauty ."

Asimov Isaak - The End of Eternity (1955)

"A vague blur of music had started up at one end of the chamber .A music robot ,creating random combinations of sound ,harmonic colors and shades that flitted agilely ,too subtle to pin down .Some couples started dancing listlessly. " 
Solar Lottery ( World of Chance) 1955
Philip K Dick

birds were singing in the back while recording this ,not captured sadly

and snow..

universal pcboard with attenuators ,noise generastor and envelope followerr