zip file for sequencer panel layout
can be found here
always good to check the bindubba PCBs thread at muffwiggler for updates, questions from other builders and probably some answers
always good to check the bindubba PCBs thread at muffwiggler for updates, questions from other builders and probably some answers
new modules and progress
Sent off an order for a bunch of pcbs today. Heres the screenshot:
More bindubba1 & bindubba3 sequencer boards, a basic dual mixer, a 'crossbreed sequencer/waveshaper', two VCOs and jack/led/power breakout boards.
The Crossbreed started out life as a cross product generator from Electronotes using TTL chips, this version uses CMOS, which means less chips and less current draw. Anyway it can be fed two signals from VCOs, usually best if they are almost the same frequency, but not quite the same. The divisions and harmonics from these signals are then combined adjusted to obtain thicker (literally) waveshapes or carefully set up to create your own original animated waveforms. Animated because you can of course modulate the VCOs and obtain continuously changing waveshapes. Guess I should record some demos and post some oscilloscope shots for this to make sense......okay soon.
The name "Crossbreed" has two implications, one is the output is an audio waveform obtained from divisions and combinations of the input audio rate signals. The other is that this module can also function as a sequencer providing extremely complex and interesting patterns as a result of being fed two different clock signals.
The VCOs are functionally based on the Aries AR-338 PMS VCOs. The AR-338 was built around the SSM2030 VCO IC, which is now very rare. So I used the well-known Mikulic sawtooth core from Electronotes (used in many VCOs - CGS, MFOS, ASM) and dressed it up a bit to get the AR-338 functions.
So what does it do? It emits sawtooth, triangle, pulse, processed saw and pan-pulse outputs. The pan-pulse is cross of the pulse and triangle waves which can be modulated by CV, it actually looks like the signal from Ian Fritz's double pulse waveshaper, although the circuits are completely different.
The processed sawtooth can be adjusted to obtain a variety of waveshapes or CV can be used to morph it between different shapes.
Now the PMS bit, which means (in this case) "phase modulated sync". Usually VCOs can be sync'd together in different ways, soft sync and hard sync (google it). The PMS function allows the sync to be shifted to different parts of the syncing signal; the rising edge, falling edge or anywhere in between. Of course it can be CV'd to give... (well fk me@!) phase modulated sync!
Guess I will get some mp3s and 'scope shots up soon to make this clearer.
Panels for the sequencer boards are being manufactured this week and should be ready soon. They look much the same as the paper-faced proto-type a few posts down but are bare aluminium with baked on black labelling. The company manufacturing them also do panels that are used in many radio & TV studios around Australia, so I am expecting them to be excellent and durable.
Have also ordered 2000 knobs, Davies 1900H clones in yellow and purple
More bindubba1 & bindubba3 sequencer boards, a basic dual mixer, a 'crossbreed sequencer/waveshaper', two VCOs and jack/led/power breakout boards.
The Crossbreed started out life as a cross product generator from Electronotes using TTL chips, this version uses CMOS, which means less chips and less current draw. Anyway it can be fed two signals from VCOs, usually best if they are almost the same frequency, but not quite the same. The divisions and harmonics from these signals are then combined adjusted to obtain thicker (literally) waveshapes or carefully set up to create your own original animated waveforms. Animated because you can of course modulate the VCOs and obtain continuously changing waveshapes. Guess I should record some demos and post some oscilloscope shots for this to make sense......okay soon.
The name "Crossbreed" has two implications, one is the output is an audio waveform obtained from divisions and combinations of the input audio rate signals. The other is that this module can also function as a sequencer providing extremely complex and interesting patterns as a result of being fed two different clock signals.
The VCOs are functionally based on the Aries AR-338 PMS VCOs. The AR-338 was built around the SSM2030 VCO IC, which is now very rare. So I used the well-known Mikulic sawtooth core from Electronotes (used in many VCOs - CGS, MFOS, ASM) and dressed it up a bit to get the AR-338 functions.
So what does it do? It emits sawtooth, triangle, pulse, processed saw and pan-pulse outputs. The pan-pulse is cross of the pulse and triangle waves which can be modulated by CV, it actually looks like the signal from Ian Fritz's double pulse waveshaper, although the circuits are completely different.
The processed sawtooth can be adjusted to obtain a variety of waveshapes or CV can be used to morph it between different shapes.
Now the PMS bit, which means (in this case) "phase modulated sync". Usually VCOs can be sync'd together in different ways, soft sync and hard sync (google it). The PMS function allows the sync to be shifted to different parts of the syncing signal; the rising edge, falling edge or anywhere in between. Of course it can be CV'd to give... (well fk me@!) phase modulated sync!
Guess I will get some mp3s and 'scope shots up soon to make this clearer.
Panels for the sequencer boards are being manufactured this week and should be ready soon. They look much the same as the paper-faced proto-type a few posts down but are bare aluminium with baked on black labelling. The company manufacturing them also do panels that are used in many radio & TV studios around Australia, so I am expecting them to be excellent and durable.
Have also ordered 2000 knobs, Davies 1900H clones in yellow and purple
bindubba 1 schematic & build notes
build notes
schematic
bindubba3 schematic (build notes soon - nearly finished)
schematic
There are two bindubba1 PCBs left and one bindubba3.
build notes
schematic
bindubba3 schematic (build notes soon - nearly finished)
schematic
There are two bindubba1 PCBs left and one bindubba3.
PCBs for sale
It is a wonderfully easy sequencer to use, one clock input gives 16 different but related control voltage outputs which can be used for brain-twisting convoluted melodies, the switches can be used for 'song sequencing', plus it gives 8 gate signals which are divisions of the input clock (perfect for driving the bindubba3 - below).
The boards are connected by 40 pin IDC cable (same inside your PC = cheap), so wiring is very easy. Building the PCB itself is not so easy, the components are VERY densely packed. Good soldering skills and a fine tipped iron are essential. The boards need one mod: cut a trace and add a resistor. It was a problem that didn't show up on the vero-board version.
More info on the design and some demos can be found HERE. Pots and switches can be mounted on the PCB. The breakout boards are connected to LEDs and jacks by wire clippings. I used clippings from LEDs which are quite stiff and the boards are held on very well with no need for extra mounting. Pictures of the mounted boards at the bottom.
The pictures below show the bindubba3 polydirectional sequencer. These are protoype PCBs, 9 are available (7?). One set of bindubba3 boards is $35 plus shipping. Again pots and switches are mounted on the PCB and some sections are very densely populated, so good soldering skills are essential.
This sequencer is really quite fun to use and can be patch-programmed to operate in a variety of different patterns. You can do the old school count up from 1 to 16 if you wish but it can do so much more. More info here The schematic in the link is an early version and will be updated soon.
Watch the vid to see the bindubba3 in action, various patterns from different reset programming patches can be seen.
Now the bad news, this board requires a number of mods to get it to work. A minimum, to get it working, is cut one trace, add two jump-wires and 8 resistors...not too difficult. To get full patch-programming functionality it needs another 7 traces cut and about 7 jump-wires added.
I go by andrewF on muffwiggler and electro-music and can easily be found on either forum. Discussion of these designs can be found on the muffwiggler DIY forum. Build info will be provided for those that buy the PCBs.
coming soon
bindubba sequencer panel
vco panel
relay panel
cmos panel
meat & 2 veg panel
http://www.sdiy.org/pinky/
vco panel
relay panel
cmos panel
meat & 2 veg panel
http://www.sdiy.org/pinky/