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TB-EFA Rev2
The TB-EFA Rev2 is the second version of our best selling TB-EFA module. It shares the same ‘3 and a bit’ pole filter circuit as the Roland TB-303. It also provides a complete version of the envelope used by the 303 with decay control. Rounding off the module is the BA662 based VCA circuit which…
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Firmware Update v1.5.4.3
A new release of firmware for both the TB-Seq Eurorack module and the TB-Valhalla v3 desktop synth. Whats New in v1.5.4.3 Pattern shifting allows you to nudge or shift a pattern by one or more steps. So if your pattern was 1,2,3,4,5,6,7,8 you can shift it to 5,6,7,8,1,2,3,4 either left or right shifting is possible…
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GS1-E (batch 220818)
If you are having trouble with the GS1-E not outputting an envelope, you purchased your GS1-E kit from Thonk before June 2023 please check if you have the order batch code ending 220818 – batch code is shown below in the picture in bottom left corner. Assuming you’ve checked all your soldering and parts are…
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SO16 to PDIP16 Adapter
There are many adapter board available for SO8 to PDIP8, mainly because it fits nicely into the PDIP8 footprint, but I couldn’t find anything that meant it was ‘socket compatible’ when you get a DIP16 IC socket. So… Here is one I designed that uses SMT pin headers and means as long as there is…
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TB-FX
The TB-FX Eurorack module is an 8hp effects module that combines both a simple short period delay and gritty overdrive that both compliment the classic 303 tones from the rest of the TB series. EFX1 – Delay Starting with the delay, the module uses the classic chip used in many guitar pedals, the PT2399, which…
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TB-EFA 5v Gate Fix
Some variants of the CD4013 that people have been using seem to stall or at least go into an always on state if the gate signal is > 5v. This shows itself as the accent always being on, and the decay knob not adjusting the envelope. You can solve this by attenuating your gate signal…
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TB-Seq
Module News: 5th Dec 2023 – New firmware available The TB-Seq Eurorack module and integrated MIDI interface in the Ge0synchronous desktop semi-modular synthesisers combine standard MIDI note to CV V/Oct, gate and trigger conversion as well as MIDI to CV clock with configurable PPQN (pulse per quarter note) – both in and out. The module…
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TB-EFA
The TB-EFA shares the same ‘3 and a bit’ pole filter circuit as the Roland TB-303. It also provides a complete version of the envelope used by the 303 with decay control. Rounding off the module is the BA662 based VCA circuit which is also controlled by the same envelope as the filter. Like the…
Ge0sync Synth 