To make the 4017 counter swing is to make it do a longer step, then a shorter step so we get a daa-ta-daa-ta rhythm, correct?
If so, then you need a swinging clock source that does one longer pulse, then one shorter pulse. PWM will not help here. You could possibly do it with a CD4013 set up as a divide-by-two to extract the odd/even pulses of the 40106-based clock, then somehow use that detection to rise/drop the 40106's frequency slightly each other pulse. Then you get the 16ths swing, if we do the "clock is 16ths" assumption (we usually do). Could probably be done with a 4066/4053 and some resistor shenanigans, or with actual voltage control over clock frequency.
I tested this trick in falstad that sort of kind of adds CV to the pause between the pulses, so then we can make one pause shorter, and get the daa-ta-daa-ta swing rhythm going. Don't mind the op-amp, think of it like an emulation of 1/6 a cd40106. This is a bit hacky cause the swing control and freq control are not actually intertwined a lot, so every time the clock speed is changed, the swing % will change as well, and will have to be readjusted. I guess the procedure is to start with zero swing, tune the clock to the tempo slightly slower then wanted, then add swing. As for the NE555, i'm not sure this same trick will work, but something along the lines should. I just never really went back to 555's for clocking duties since it's an overkill when you have a 40106.
Or make an actual voltage-controlled clock and then use the 4013 to divide it and speed up each second pulse with a feedback patch into the clock's frequency CV - i already tried this one, and it works well. Although i'd recommend going with the routes i noted previously for now.
If so, then you need a swinging clock source that does one longer pulse, then one shorter pulse. PWM will not help here. You could possibly do it with a CD4013 set up as a divide-by-two to extract the odd/even pulses of the 40106-based clock, then somehow use that detection to rise/drop the 40106's frequency slightly each other pulse. Then you get the 16ths swing, if we do the "clock is 16ths" assumption (we usually do). Could probably be done with a 4066/4053 and some resistor shenanigans, or with actual voltage control over clock frequency.
I tested this trick in falstad that sort of kind of adds CV to the pause between the pulses, so then we can make one pause shorter, and get the daa-ta-daa-ta swing rhythm going. Don't mind the op-amp, think of it like an emulation of 1/6 a cd40106. This is a bit hacky cause the swing control and freq control are not actually intertwined a lot, so every time the clock speed is changed, the swing % will change as well, and will have to be readjusted. I guess the procedure is to start with zero swing, tune the clock to the tempo slightly slower then wanted, then add swing. As for the NE555, i'm not sure this same trick will work, but something along the lines should. I just never really went back to 555's for clocking duties since it's an overkill when you have a 40106.
Or make an actual voltage-controlled clock and then use the 4013 to divide it and speed up each second pulse with a feedback patch into the clock's frequency CV - i already tried this one, and it works well. Although i'd recommend going with the routes i noted previously for now.
Statistics: Posted by SynthfoxAstro — Fri Nov 22, 2024 7:50 am