I have just released a new sequencer module, the Psych-Tone Sequencer.
It is currently on introductory sale for only $5, so go get it while it's hot!!!
This module is based on the sequencer part of the "Psych-Tone" synthesizer as published in the "Popular Electronics" magazine from February 1971.
It uses 6 JK flip-flops that basically form a shift register to create a 63 note pseudo-random sequence. The jacks in the left-most column let you tap onto the flip-flops outputs (normal and inverted) for further usage. The LEDs visualize the state of each output.
The behavior of the shift register - and hence the order of the sequence - can be controlled with the scale and direction switches above and below the Tune Select column respectively. The shift register can be triggered by the internal clock ranging from 0.1 Hz to 20 Hz or by an external source via the clock input jack.
The outputs of the flip-flops can be selected to generate a gate signal. Each switch in the Pause Select column selects a flip-flop output to use for the gate signal, where the gate will open if any selected flip-flop output is high.
In the Tune Select column you can select the flip-flop outputs that will contribute to the CV value at the output jack. Each knob selects one of the 12 flip-flop outputs. If the selected output is high, then the corresponding voltage set in the Ratio column will be added to the output value. An offset voltage can also be added to the output value with the knob next to the output jack.
When modulating the Tune Select or Ratio, you can enable S&H for each modulation signal. The S&H is triggered either by the internal clock or (if connected) by the external clock signal.
Features that have been added in this software version compared to the original design:
- clock input jack for external triggering
- output jacks for the flip-flop outputs
- LED indicators
- modulation ability for Tune Select and Ratio
- S&H for modulation
- CV offset on output
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That was around the last issue I ever looked at. I did play for years, though, with a fuzz box I built from an even earlier issue of the mag. Diode clipper, as I recall. Still have it, in a keyboard gadget bag I probably haven't opened in years.