VCO build

VCO: Assembled. The PCB was pretty straightforward. The most novel part I did first, soldering the SOIC SSM2212. It went smoothly enough, didn’t even need my solder braid and all the connections were good. The tempco resistor went on top of it, with some heat sink compound to join the two. (The tempco is R24; […]

Video: Breadboarding the MFOS VCO

VCO breadboard part 2

OK, gonna write this complicated stuff up maybe more for my own benefit than anything else, but your thoughts welcome. What happens in the pulse output is the ramp goes into an op amp wired as a comparator and makes a pulse wave whose width depends on the reference voltage you set on the pulse […]

VCO breadboard

I’ve lately been breadboarding new modules before building them, even ones based on designs and PCBs developed by others which presumably have been debugged already. Reasons? One is I think breadboarding helps in understanding the circuit design. Another is testing modifications: Obviously if I have in mind making substantive changes to the design I’m going […]

Case two part two b: VCO

I’m now thinking about whether to change my plan for the (first) Kosmodrome VCO. What’s prompted this is Sam saying he’s going to consider a Mark 2 LMNC VCO. Sounds like it would address the output levels, add a sine output, maybe ditch the 3340 pulse wave in favor of creating one from the triangle […]