Tuesday, March 8, 2016
Why, you might ask? Well, because I was tired of having a 6V system with all its downsides. Fortunately motelek.net has a wealth of information on how to upgrade my old Bosch ignition-and-power-system (there has got to be a better word for this, I am sure of it) to 12V, which has a lot of benefits (proper light in the front, I can use LEDs for tail- and brakelight etc).
But, this means I had to rewind two coils. Since I am somewhat lazy I threw together this machine with parts that I had lying around. It is powered by a sewing machine motor, which I had to significantly gear down, since it tops out at 6000rpm - waaaay too fast. I used some MDF discs that I had kept for ages in a cardboard box, various rubber bands and threads, and some rubbish MDF pieces.
It is important to keep count of your windings, so I rigged an Arduino to the system: every revolution a switch is momentarily closed, the Arduino registers this impulse, increases a counter by 1, and sends the counter value to the serial monitor. Easy peasy!
Now it is a piece of cake to make the necessary 505 respectively 180 windings.
Tuesday, October 27, 2015
I built this thing called "SDR device" for the Commodore 64. With this you can load and save patches made with MSSIAH without having to use Floppy disks. The device was conceived by firestARTer, and he was nice enough to send me a pre-programmed MCU for it (which speedily arrived from Rotterdam). You will find all the information to build your own SDR device on his website.
The case is from an ancient Hewlett Packard Laserprinter accessory, which connects with a DB9-connector to the C64. There is a LCD display, an encoder with pushbutton, and a extra button.
The data gets saved on a MicroSD-card with a capacity of (wait for it...) 128 megabytes of memory.
It´s kind of funny: this is so much memory from the C64s point of view, yet such a tiny amount by todays standards.
The C64 also has a 6,3mm jack for audio out, and a cinch connector for video out (so much easier on the eyes than using the antenna output).
The SDR device works remarkably well - and on a sidenote: MSSIAH is the only program so far that uses this storage medium.
Friday, January 11, 2013
Tuesday, January 8, 2013
And yes, that is a 9mm shell next to the Resonance knob: I put a hole in the panel where I should not have, with a 9mm diameter. The shell just happened to lie around in the streets of Neukölln, Berlin, and it fitted perfectly. So there!
Sunday, July 4, 2010
Tuesday, June 29, 2010
The 505 is a digital drummachine made by Roland. It has a nice, easy-to-use sequencer, a big display, full MIDI capabilities and some of the most boring sounds that you'll ever hear...
Time to mod it, I'd say!
It now sports single outputs (1/4") and trigger outs (1/8"). Especially the trigger outputs are quite handy for owners of a modular synth... the 505 will work as a MIDI-to-trigger converter too!
Also the sounds are now tunable - I added 8 new oscillators (this time 40106 based, unlike the 555 based ones on my TR 707) to accomplish this.
I also added volume controls, so now there are 16 new knobs on the front panel. The volume controls are doubling as a"crunch" control, which goes like this: the maximum volume is reached at the 12 o´clock position (and the potentiometers have a center detent to reflect this), turning the knob further to the right will overdrive the internal mixer stage a bit, resulting in a slightly distorted sound. This adds a nice punch and grit! Due to the way the mixer stage is designed this will only work on the main outputs.
Most of the necessary informationon how to do these mods can be had from the Burnkit2600 TR505 page, so thanks to those guys!
All that stuff did not fit into the stock enclosure, I had to make some side cheeks out of stained plywood in order to raise the height of the case by 3cm.
Check the sound sample below for a glimpse of what this machine sounds like. No FX, no overdubs, no EQ used - recorded straight from the master output.
Monday, June 21, 2010
So here it is, my second x0xb0x. This one has been finished for ages, but only today it occured to me that pictures would be nice.
It is completely self sourced, which means that I did not buy a kit but aquired all parts separately. Likewise there is no official Adafruit serial number.
The mods are:
PWM for the square wave
Accent Sweep Speed selectable between fast, normal and slow
Accent Decay control
Filter Overdrive with "color" knob
Bass Boost, Resonance Boost (with separate pushbutton switch and LED indicator)
"Eternal Bliss" - this is a combined Gate On Forever / Envelope On Forever to get those liquid acid lines
Filter Modulation with selectable source (square, saw, VCA) and two modes (buffered / unbuffered)
Envelope Retrigger button
VCO out / Filter in on TRS socket
orange / amber 3mm LEDs
Sokk0s 1.9 operating system
Sunday, February 7, 2010
I designed the PCB and the frontpanel myself whilst the circuit is inspired by the invaluable genius that is Ken Stone.
The keen eye might wonder why there are some odd componends on the circuit board, most notably the HUGE 2W resistors. Easy: I am a sexy Recyclotron and so I used what I had on hand. That sometimes means that I pull components from junk electronics (always remember: recycle or die)
Because I am such a nice guy I wrote him a manual as well (he's stupid and I had a lazy sunday evening to waste). Now all that is left is to do is to actually send him the thing. As much as I hate to part with the module -I am sure it'll be in good hands.
Tuesday, August 18, 2009
Since he is an avid guitar player (and the other half of our Hardcore Electro Country Band Dezombiefied) I just had to give him something relating to that.
So here it is, the BENJAMUFF PI.
Check the Big Muff Museum if you still dont get it...