In the December issue of the magazine Elrad from 1978 there was a sequencer, which I copied and used with my MS-20 and MS-10. Unfortunately I gave it away sometime, because I had sold both synthesizers. In the meantime I remembered this easy to build sequencer and rebuilt it.
Since I don’t want to violate any rights, I have here the article of the Australian sister magazine ETI (Electronics Today International). There the sequencer is called ETI-603.pdf.
I didn’t like the original PCB and I created a new one with ExpressPCB, ETI-603.pcb:
The sequencer is exactly what I need and I just love it.