I’ve been thinking about a module that would have six LEDs on the front panel (and maybe another one that would have ten), and something I noticed in a breadboard test is that if one of those LEDs was a diffused green one from Tayda (SKU A-1553), I was definitely seeing a change in the […]
Read More Not too brightI started noticing trouble with my synth power supply units (PSUs) a while ago. Maybe you are having similar trouble too, or maybe you will. Hence this post, because now I know what’s going on, and how to fix it. I have a couple of Frequency Central FC Power supplies, and a couple based on […]
Read More Startup troubleThis is the Hero VCO, my new voltage controlled oscillator. It started off as kind of a mashup of the Kassutronics VCO 3340 and the LMNC 1222 VCO. You can still find traces of both in the schematic, as well as bits of the Thomas Henry VCO Maximus, although little has evaded modification. Like those, […]
Read More Hero and SidekickI’ve come a long way since my second synth purchase in 2008: (First was a PAiA Gnome some 30 years earlier.) Funky little thing, a toy but not bad considering it cost about $46 back in 2008. Nowadays Amazon has it at $91 and there’s a Mark II (with seven knobs!) for $114. No word […]
Read More Gakken SX-150 reknobbedI finally got around to putting a third PSU and bus board in the case and loading up all those modules I made in March and May. That included making a dozen power cables in one sitting, and testing them — the testing took maybe three or four minutes, with the cable tester. They all […]
Read More Kosmodrome fills up
Analog Output 