yamaha pss6 - circuit bent

i've circuit bent my last toy-keyboard, a yamaha pss-6. i've found an overdrive and a pop effect searching on the IC3 (smaller). the IC2 (bigger) is for totally random noise effects, but too often crashes the toy. i had to replace the speaker with a smaller one to put the two potentiometers for the bends.

schematic:


specifications:
overdrive
pop effect
line-out

audios:
pss6_1.mp3 (815 kb) - ovedrive
pss6_2.mp3 (965 kb) - pop effect + ovedrive

photos:

homemade keytar

a friend gave me an old master keyboard, a roland pc-200. i decided to transform it into a keytar, a strap-on keyboard. i've used two guitar/bass knobs for strap and two buttons (bending up and modulation) and one swich (for permanent modulation). it's easy to do bendings with the joystick (even if it has no neck like other keytar) but with the button it's nicer.

specifications:
bending up button
modulation button
modulation switch (on/off)

photos:

jen sx1000 modded

about two months ago i bought this analog synth. a poor man's moog produced in italy at the end of 70ies. now i'm using it with some behringer stomp boxes (flanger, chorus, tube overdrive). i've searched infos and schematics to add a sub-oscillator to get a more typical moog sound. with this mod i can have a -1 octave square added to the original oscillator. if you want to do that with your jen sx1000 read this (i haven't found the author). i also added a power jack instead of the built-in power cable and re-coloured the knob caps.

specifications:
sub-osc (square -1 octave)
power jack

audios:
jensx1000_1.mp3 (730 kb) - nice lead with some effects
jensx1000_2.mp3 (633 kb) - sub-osc misc sounds
jensx1000_3.mp3 (518 kb) - sub-osc misc sounds

photos:

casio ml-1 - soft circuit bent

inspired by a comment on benthack photos #2 i've decided to soft circuit bending my casio ml-1 magical light. i've added two common bends: a line-out with a switch on/off for the speaker and a battery potentiometer.

specifications:
line-out
battery potentiometer

audios:
ml1_1.mp3 (1,44 mb) - misc sounds

photos:

hard disk speaker

this is an old project i've done about 2-3 years ago. a friend gave me this link: afrotech's hard-disk sound system. maybe we can call it a circuit bent hard disk. (every sound you hear in this video is being produced by the hard disk)

videos:


photos:

casio sk-1 - aleatron

i've followed the casio sk-1 aleatron project in the reed ghazala's circuit-bending book but i've decided to put all switches and pots in a separate case, an old vhs box.

specifications:
image
axis
skew
poly dial

videos:


audios:
sk1aleatron_1.mp3 (2,20 mb) - misc sounds
sk1aleatron_2.mp3 (1,53 mb) - rhythm bending

photos: