Korg Monotron paired with an 8 step sequencer: The Octotron
I decided to put the External HDD enclosure to the side for a while and use this wooden box instead. I’m making a top panel for the Monotrons controls and all the CV patching out of clear acrylic. The 8 step controls will be on the front of the box. The battery packs will be mounted on the underside of the box witch will be raised by four feet made out of circular cut offs. Since the only battery pack i had for AAA batteries was a 4 cell, i modified it to act as 2 dual batteries. I’m adding a switching circuit so you can select witch bay the monotron is powered off. great feature for live situations. The sequencer circuit is hidden in the box on its PCB risers. Expect a lot more progress tomorow, im working through this build quite quick.
Here it is so far, i decided to use an on aluminium HDD enclosure. Looks pretty slick so far. It features a 4 step sequencer that sends gate and pitch CV to the monotron circuit. Thinking of adding some patch jacks in the unoccupied space at the bottom.
Yes, im hacking this one up. I plan to fit it into a new enclosure with an 8 step sequencer and a secondary VCO. With all the CV in and out you could want. Maybe even an arduino based CV pulse to MIDI sync? Hmmmm, maybe.
For now, im going to continue tripping my cat out with super high frequencies from the resonant filter.
Just messing around with a 555 VCO and a 4015 analogue sequencer. Going to add pots for all 8 steps and 2 555 VCOs to make a dual oscillator 8 step sequencer synth. then I’m going to house it in a circular acrylic case.
Just ordered one of these Velleman kits. It’s a running LED module based off of a 4015 dual 4 stage shift register and a 555 timer. This circuit can be easilly modified to work as an 8 step analogue sequencer. It’s what I’ll be using to sequence CASIO SA-20.
There’s actually a really helpful here explaining how to do this project.