Analogue 16-step-sequencer

the whole thing. a friend infected me with the information that you can make a stepsequencer out of simple led-lauflicht ("walking light"?) VERY simple. After some experimentation it came out as a somewhat bigger project. Click on pictures for higher resolution.

a look inside. everything is handwired. to the left in the back is the logic with two 4069 chips from two chead lauflicht-modules. left in front are the impedance-circuits to bring the signals for trigger/reset/cv to the right levels. on the right is the circuit for the parallel/serial-logic (with 4053 switches), the main CV-outs (scale/offset/glide) and the simple 5V-Outs.

left panel: lets take a look at the bottm part first: you have to decide whether to use internal clock or external. the clock is a simple 5v-gate signal pushing the sequencer one step further. if you play 16th notes on the keyboard you will get a 16th-stepsequence. the cool thing about "manual" triggering is that you can trigger any rhythm you like; triplets, 16th and 8th mixed, anything.

for each step you can switch gate on/off and tweak the gate length. for the mainchannel gatelength can be modulated with a CV. The DIN-Socket is for DIN-SYNC input.

the upper row is a bit more complicated. with the rightmost switch you can change the function serial (16 steps) to parallel (2x8 steps). When using parallel you can manually or via CV route to the outputs the 8 steps from the left side or from the right.