I’ve worked on a lot of electronics lately - some things -
Replacing the back colour selector switch on an MX15 with an electronic switching circuit.
Clocked by an LFO this uses a 4051 analoge switch and 4017 binary counter, and 4553 (I think!) it’s a priority encoder - to flip through the back colour setting on the mixer.
This will look great in a feedback loop. Whats nice about the MX15 is that the switch is a resistive ladder setup, it’s not MCU based (well partially)
I’m working on an XORSHIFT circuit now which is a PRNG (pseudo random number generator)
using CMOS chips, to randomise thi colour selection.
I have been micro soldering and hardware hacking a Roland DIF AT, to effect a repair. Lots of fun here using the microscope, replacing at least 15 solder pads sub .5mm pitch.
Learning a lot about embedded systems.
Working on my Cassette Synthesizer v2.2. This is going great, has a lovely panel now (FR4 PCB material drawn in Kicad.
Using Moritz Klein VCA, Envelope, VCF designs, I have extended the functionality of the envelope by implementing opamp functions to get multiple simultaneous inverted, non inverted envelope signals to control the Filter, VCA and external synths.
The cassette is basically the synth voice, and it responds to CV pitch to change motorspeed.
The linear nature of tape sounds very similar to vinyl scratching, and amazing with drumloops too.
I also added a pulse wave end of onset output, generated with a comparator from the envelope signal, and also a trigger output from the Env signal too.
These can be used for a square wave or pulse wave voice, when env is triggered very rapidly. Pulse width is cv and manual controllable.
I found a great kids digital camera too, in the Action. 1080p for 8e! Very bendable. I found there is an unpopulated header for the CMOS sensor, which I will solder a flat flex cable to, and with a .5 to 2.54 mm breakout board, the bend experiments will be made easy. It is tricky to solder the .5mm pitch header, but not so tricky as trying to connect individual bends there. I already found some great bends, and it has some quite nice mirror and negative fx too which look interesting. When the sensor is bent, this should look v. cool.
