Pixie: 40m QRP CW transceiver

first post of 2015. it’s a small pocket size 40m CW transceiver that i got off of eBay for a mere $8. i’ve…

Class AB amplifier test

this was an attempt at designing a simple transformer-less class AB amplifier using two BJT power transistors. i setup the USB fan to…

initial PCB milling test…

here’s an initial PCB test for the Triode tube overdrive on the SMBA site. this picture is pre-sanding. it was milled using LinuxCNC…

diy arduino dev board

simple dev board made from some cheap 400 contact breadboards on a piece of acrylic.

LFO modulated simple VCF

this is a rough draft of a circuit i’ve been working on based of the Simple VCF circuit floating out there. a big…

Dissolved penny

this penny has almost completely dissolved in a three month period in a solution of vinegar and salt. last time I opened the…