SUPER SIMPLE OSCILLATOR
SUPER SIMPLE DIY OSCILLATOR YOU CAN MAKE IN 10 MINUTES. SUPER CHEAP AND EASY.
So this is strange because your using a transistor in a way it isnt intended for, REVERSE AVALANCHE MODE is the name, OSCILLATING is its game!
This is based off a circuit i used in this video, which is making a light theremin out of a red bull can, no solder either!
Heres an updated schematic with a tone/filter knob!! you can put multiple oscillators before the filter!
i quickly drew this for somebody on an email. it seems this might be of help to a few people! the ground needs to be shared with everything. so you attach the ground (GND) to both the battery and the speaker!!! you can swap the speaker with an amp. or a guitar jack, cut a guitar jack and attach the outside copper sleeve stuff to ground, and the middle wire to OUT :)
for info check this video! and below is the SCHEM and STRIPBOARD LAYOUT.
***MAKE SURE YOU CUT OFF THE CENTRE LEG OF THE TRANSISTOR OR IT WONT WORK*
This is the stripboard layout with the optional CV wires you wire up to a vactrol! in the video below!!! (purple and yello wires).
SUPER SIMPLE OSCILLATOR SCHEMATIC
SUPER SIMPLE OSCILLATOR COMPONENT LIST
TRY different Transistors. check out this great link (CLICK) on reverse avalanche. he talks about different transistors he has tried, the one that caught my eye and i may have to try is SS9018 as it only needs 8 volts insteat of the aboves 12 volts!!! so im going to give this a go also.
Play around with capacitor values. the larger the capacitor the slower it will oscillate.. and the higher.... it will be all high pitched! in the red bull can video! i used a 220nf capacitor! so it was a high synth. like a theremin. But in the video above i wanted it to be low and angry so i put a 10uf on it.
Below is what 100 of these circuits put together sound like. there are 6 to every tone "filter" knob and volume. all in all its rather chaotic, i need to add on and off switches to all of the oscillators because its tough to tune, even if you isolate it to only 6 oscillators going at once.
Heres soundbenders take on the circuit! link
check out paul bergels triple skulls! the oscillators built into skull jars! He took the fact that different capacitor values make different ranges! so each are assigned a different note range :-
bass skull: 100uF capacitor
tenor skull: 33uF capacitor
alto skull: 10uF capacitor
the smaller the capacitor value the quicker it oscillates, meaning the higher the notes are!
I stuck 16 of the super simple oscillators demoed by @LOOKMUMNOCMPUTR in a box. I've now got my very own box of electric bees pic.twitter.com/ajrRXTNxui
— Shoko Peak (@ShokoPeak) February 22, 2018
Pascal Matejka's 7 drone oscillator box