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4ms rotating clock divider User Manual

Eurorack module

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Eurorack Module User Manual v1.0.1 to 1.0.2
Features
•Divide-by-1 to Divide-by-64, on 8 output jacks
•CV Rotate jack to shift divide-by amount on all jacks
•CV Reset to reset/re-sync all jacks
•Jumpers or optional break-out panel:
◦Select auto-reset (maximum 256 clocks)
◦Select maximum divide-by amount (8/16/32/64)
◦Gate or Trigger outputs
◦Count-up or Count-down mode
•UART header
◦Connects to optional MIDI breakout panel
◦Arduino-compatible
•ISP header
◦Connects to in-circuit programmer such as AVR ISP MKII for reprogramming code
•Maximum input frequency 3kHz
•4 H.P. Eurorack module
•60mA power draw (+/-12V or +/-15V)
Jacks
Clock Input (3.5V to 15V clock, rising edge triggered)
CV Rotate (0V to +5V input)
CV Reset (5V to 15V trigger)
Divided Clock Outputs (8 jacks):
Divide-by (1+R)
Divide-by (2+R)
Divide-by (3+R)
Divide-by (4+R)
Divide-by (5+R)
Divide-by (6+R)
Divide-by (7+R)
Divide-by (8+R)
...where R is the CV Rotation (0 to 63)
Rotating Clock Divider
4ms Pedals

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Summary of Contents for 4ms rotating clock divider

  • Page 1 Rotating Clock Divider Eurorack Module User Manual v1.0.1 to 1.0.2 4ms Pedals Features •Divide-by-1 to Divide-by-64, on 8 output jacks •CV Rotate jack to shift divide-by amount on all jacks •CV Reset to reset/re-sync all jacks •Jumpers or optional break-out panel: ◦Select auto-reset (maximum 256 clocks)
  • Page 2 PCB v1.0.2 PCB v1.0.1 Jumpers There are six jumpers on the back, labeled 3, 4, 5, 6, 7, and 8. Each can be set with a jumper plug, or an optional break-out panel with switches. The jumper positions vary among PCB versions. See the above photos to identify the location of jumpers on your PCB (the PCB version is written in white letters near the /8 Jack).
  • Page 3 Up-beat/Down-beat jumper: In Up-beat counting, each jack fires after "N" number of pulses are counted on the input jack (where N is the divide-by- number). So, after a Reset pulse, only the /1 jack will fire on the first clock pulse. On the next clock pulse, the /1 and the /2 jack will fire, then on the next pulse the /1 and /3 jacks will fire, etc...
  • Page 4: Operation

    Operation Apply a clock signal to the Clock Input jack. Rising edges of 5V or greater will cause the internal dividing counters to be incremented. Each jack has its own counter that counts from 1 to its divide-by-amount, and then resets back at 1. In up-beat counting, each jack outputs a trigger pulse when its counter reaches the divide-by amount assigned to that jack.
  • Page 5 Rotation Tables Table 2: Divide-by amounts at each jack, with max divide-by amount set to 8 (Jumper 3 in, Jumper 4 in): Voltage at CV Rotate Jack Jacks <1.0V 1.00V - 1.65V 1.65V - 2.30V 2.30V - 2.95V 2.95V-3.60V 3.6V-4.30V 4.30V-5.10V >5.1V 1+R/Red 2+R/Orange 3+R/Yellow...
  • Page 6 Table 4: Divide-by amounts with max divide-by amount set to 32 (Jumper 3 out, Jumper 4 in): Voltage at CV Rotate Jack Jacks < 0.68V 0.86V 1.04V 1.22V 1.38V 1.54V 1.70V 1.86V 2.02V 2.18V 2.36V 2.52V 2.68V 2.82V 3.00V 0.5V 1+R/Red 2+R/Orange 3+R/Yellow...
  • Page 7 PCB or Code v1.0.2 TRIGGER MODE, UP-BEAT COUNTING (NO JUMPERS IN 7&8) CLOCK INPUT: div by 1: div by 2: div by 3: div by 4: div by 5: div by 6: div by 7: div by 8: GATE MODE, DOWN-BEAT COUNTING (BOTH JUMPERS 7&8) Indicates falling-edge of clock input (all others are rising-edge) CLOCK INPUT: div by 1:...
  • Page 8 4ms Rotating Clock Divider How CV Rotate Works Rotate Reset In this metaphorical illustration, applying a voltage to the Rotate jack makes the outer 0V - 5V circle of jacks rotate around the inner circle of divided clock signals. For a technical chart of the exact voltages needed to cause exact rotations, see the User Manual.