SEQUENCER PANEL
finally stopped testing new designs and actually started 'production'
The 1st panel is completed and worked straight away = nice!
A user manual for the Sequencer panel can be found HERE
The 1st panel is completed and worked straight away = nice!
A user manual for the Sequencer panel can be found HERE
The 2nd vid is by Jono
5 more
tested and working
1. Tb303 filter clone with CV inputs for Cutoff, Mod and Decay.
2. Filter based on the Arp4023 with added gain bandpass output and modded for LM13700 OTA, this also serves as a pretty decent VCO when the Q pot is set accordingly.
3. LDR based VCA, based on the one found in the Korg PS3200 and a schematic from an old Japanese diy magazine.
4. dual LFO, standard op amp based LFOs, with pots to change waveshapes
5. 5 stage resonator; an extended version of the 3 stage 555 generalised resonator found in Electronotes. It certainly works and is interesting but not entirely sure I like it yet, will probably seek a 2nd opinion
As usual, minimal wiring required
1. Tb303 filter clone with CV inputs for Cutoff, Mod and Decay.
2. Filter based on the Arp4023 with added gain bandpass output and modded for LM13700 OTA, this also serves as a pretty decent VCO when the Q pot is set accordingly.
3. LDR based VCA, based on the one found in the Korg PS3200 and a schematic from an old Japanese diy magazine.
4. dual LFO, standard op amp based LFOs, with pots to change waveshapes
5. 5 stage resonator; an extended version of the 3 stage 555 generalised resonator found in Electronotes. It certainly works and is interesting but not entirely sure I like it yet, will probably seek a 2nd opinion
As usual, minimal wiring required
new modules tested
got a bunch of boards in this week, which distracted me from building sequencers. Just had to see if they worked.
So there is a basic envelope generator, all trannie core circuitry, just an op amp on the output to get 0-6V levels.
The crossbreed waveshaper/sequencer thing...not really sure what to call it. Feed it two VCO signals and it will divide them down by /2, /4, /8 and /16, plus AND gate various divisions from each input signal, then all of these 12 signals and the original inputs can be nulled or mixed to deliver a rather chunky output. If you feed it two slow clock signals you get a sequencer...of sorts, nothing like any other sequencer out there.
The dual mixer is simply two three input, single output DC mixers, nothing special but essential.
The VCO is as described below, haven't fully set it up yet but have had it running and it seems to work beautifully. As for wiring, not counting power lines, the Crossbreeder needs 3, EG needs 2, Dual mixer needs 8 (bugger!) and the VCO needs 0 (perfect)
So far all boards have worked fine, with no trouble-shooting or kludges at all. I had a Coopers Pale tonight!
Crossbreeder & EG
Crossbreeder & EG
Dual Mixer
VCO
VCO
So there is a basic envelope generator, all trannie core circuitry, just an op amp on the output to get 0-6V levels.
The crossbreed waveshaper/sequencer thing...not really sure what to call it. Feed it two VCO signals and it will divide them down by /2, /4, /8 and /16, plus AND gate various divisions from each input signal, then all of these 12 signals and the original inputs can be nulled or mixed to deliver a rather chunky output. If you feed it two slow clock signals you get a sequencer...of sorts, nothing like any other sequencer out there.
The dual mixer is simply two three input, single output DC mixers, nothing special but essential.
The VCO is as described below, haven't fully set it up yet but have had it running and it seems to work beautifully. As for wiring, not counting power lines, the Crossbreeder needs 3, EG needs 2, Dual mixer needs 8 (bugger!) and the VCO needs 0 (perfect)
So far all boards have worked fine, with no trouble-shooting or kludges at all. I had a Coopers Pale tonight!
panels
I got panels
These are raw aluminium 2.5mm, CNC'd panels, with the labels screenprinted/baked on and look great.
I like raw metal but will test one to see how it goes with a clear sealant, mainly to protect against Twistie fingers.
Thanks to PNEgraphics for doing a great job.
These are raw aluminium 2.5mm, CNC'd panels, with the labels screenprinted/baked on and look great.
I like raw metal but will test one to see how it goes with a clear sealant, mainly to protect against Twistie fingers.
Thanks to PNEgraphics for doing a great job.
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
