Another project which took more time than expected, but it does a nice job.
The CV in is over- and negative voltage protected, but not 1V/Octave. It still has a good overall pitch control.
It’s possible to make music, but not in the usual way 🙃
I’m using it as drone or raspi synth voice …
There’s some glitchy FMish amplitude modulation going on and i realy like it.
I’ve used some very bright blue LEDs as peak and frequency indicators which lead into a simple passive summing mixer with attenuation.
The root circuit is based on the schematics of Wikipedia with some several adjustments for better frequency response.
My architecture became better and i will avoid panel mounting wiring for sure in the future. But it’s still a mess 🤣
The accuracy of my panel drilling skills is … I need to work on this 🤔
Somehow i became a fan of single sided / single hole coppered blank PCBs with this project …
The parts i’ve been using:
6x100k pots, 1x50k pot (pitch),
1uf caps, 100nf caps (bypass & output),
47uf caps (pitch in)
4,7k resistors for eye cancer bright LEDs
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In case someone thought it‘s not possible to make music with a handmade triple 555 oscillator 🤓I‘m heading to some serious 3340 projects and maybe some polyphonic stuff. So many things to do 🙃⚙️ #ne555 #ne555timer #555drone #555oscillator #oscillator #diy #diysynthesizer #modularsynthesizer #synthesizer