I will now focus on how to simplify the Envelope/Internal Clock and then move to Touch sensing circuit.ĮDIT: I was wrong about the dynamic envelope clipping idea. I guess these are the only improvements regarding the Sequencer core (Sheet 3/4). In result, easier conversion of Pitch/Strength/Time CV outputs and no scaling of Gate outputs (according to the manual).

Thus configuration of transistors allows for controlling action due to presence of controll terminal (i.e for BJT ‘Z’ is Base and for FET’s ‘Z’ is Gate terminal). So I decided to switch all logic chips to 8V. Since Diodes having only 2-terminal means no controlling action possible whereas Transistors (BJT, FET’s e.t.c) is A three terminal device. For this to work just like original product (threshold of 2V), the power supply of the chip has to be something around at 8V. In the meantime I noticed that the 2V comparators-related OpAmp can be dropped and CD4050 buffer can be used for this utilizing remaining 4 stages. Nice!!! I will check both Mosstone and Meng Qi's. Cheers!Ġ-CTRL clone.pdf (603.86 KiB) Downloaded 114 times I would be really glad to hear some suggestions/comments. For now, I will leave the PDF containing all schematics I made + Serge TKB schem. And maybe it can be significantly simplified to reduce the part count. Also, I am aware that current version of the schematics may be full of errors such as resistor/capacitor values. Because I have very little experience in designing my own modules (so far my DIYing was limited to making slight modifications to other designs, never had a chance to design something from scratch) and poor electrical knowledge, I will try to breadboard each section in near future and test it.

This one is heavily inspired by the blog post on Lorre Mill page (Some Thoughts on Envelopers).įor the Dynamic Gate I assumed that it is just the Strength voltage that is switched on and off by the envelope's gate.įor the Dynamic Envelope however, this weird behavior of adding a sustain phase - I imagine this is just amplifying the Envelope to the point of clipping against Opamp positive rail.Īt this point in time, this is just the schematic. Envelope Generator (or actually Decay-Only function Generator that can be looped): Touching them opens transistor pairs, the current is then processed to create CV and Gate.įollows the same principle as Serge TKB, but instead it uses 8bit Priority Encoder to decode the input from the touch plates.ģ. So I managed to split it into several sections: And yes, this can be easily compared to Serge TKB. Also, my setup miss creative controller/sequencer module so I started digging.Īfter some time, 0-CTRL caught my attention once again and I thought: 'I have seen this somewhere'. Recently I discovered that the process of DIYing modules is much more satisfying to me than just simply buying them.

Transistor keyboard or controller