Hi. Could someone help me again?
I’m trying to design my own CLOCK module for my existing Eurorack sequencers.
Looks like an astable 555 timer circuit would work well. Let me know if you don’t think so.
I need some guidance with improving this preliminary circuit.
It needs a Clock Rate knob to change the speed. I’m hoping that POT in the picture will do this. It would also be nice to have a switch to change between ranges x1 or x10 speed.
Clock Rate Knob : 0.1 Hz - 10 Hz (x1)
1 Hz - 100 Hz (x10)
Range Switch : x1 or x10
It would also be great to have a knob to change the gate time (duty cycle), around 10%-90%. Is it as simple as adding another POT to R2?
What would I need to add to this circuit and what are the best values for POT, R1, R2, & C?
The plan is to power this from a Eurorack +12V. Is that ok? How can I improve my pulse output connection to be 0-5V and safe for patching to other synth modules?
Found this circuit. Maybe this is a better starting point. It is suppose to be independent variable frequency and duty cycle.
- Does anyone have a LTSpice model for the LM393? I would like to try to simulate this latest circuit.
There is also this one which looks similar to the second. I would think one of these should work after swapping some components.
Why not just an LFO module with a square/PWM output?
Hi, Toneburst. Yes that would work. The reason I’m trying to build one myself is so I can have exactly the controls I want.
I found one that has almost everything I need : http://www.modular.fonik.de/pdf/VC_Clock.pdf
Out of production though. If I could mod that VC CLOCK module to have a start, stop, and step buttons, I would be all set.
You know of any other vc clock modules with adjustable duty cycle?
The other idea I was thinking about would be to make from scratch using a micro controller and Mutable Instrument examples.