Monthly DIY project update post

What did I accomplish building-stuff-wise in February?

• Built this SN76477-based noisemaker for my sweetie.
• Made some small progress on the SN-Voice and MPS. They’ll be done soon. I swears. Also got a TH SuperController PCB, so add that to my Thomas Henry queue 😉
• Started on a Blacet Dual SVF (he was clearancing the PCB. I said “why not?”) Of course, I neglected to get a front panel for it. Gotta rectify that.
• Threw together an incredibly simple triangle wave LFO (it’s an LM567 tone decoder/PLL IC, a cap, a resistor and a pot. Add an LM7809 if powering off 12/15V). It’s only on a breadboard now, but I’ll fully document it in a future post.
• built my own lousy rendition of a Gene Rayburn Microphone, as well as the SparkFun mic preamp.
• Designed and ordered a PCB (two, actually) for the USB audio interface I decided to build – I decided flying wires on a protoboard was just too much opportunity for noise issues. Once those come in (tomorrow?) I guess I’ll have to get started on one.
• Finally received the Gristleizer PCBs I ordered in January. Put one together, but it’s not quite right yet. Waiting to get my account approved on diystompboxes.com to try to get some tech support.
• Attempted some more debugging on the 4069 VCO. fixed one bad connection, and switched out the 4069 with a more appropriate one (4069UB instead of HCF4069). Still no sound. Getting stumped.

I also acquired a number of useful tools this weekend – a mitre box/backsaw combo, a center punch, a clamp, nibbler tool (which should allow me to cut rectangles!), some electronics-quality tweezers, and a set of helping hands.