In my last post, I went over the design of a Colpitts crystal oscillator design that put out a moderately clean 7 MHz signal. In order to match the output impedance to 50 Ω, an NPN feedback pair (at least that’s what I’m calling it) was designed. While meeting the specs for driving an ADE-1…
Tag: pcb
Milling PCBs with Linux…
This is a quick outline of my LinuxCNC setup. Basically, I have an old HP Compaq Pentium IV that’s running Xubuntu 14.04. I had to install the Xenomai real-time kernel in order to make it work with LinuxCNC 2.5.2 which controls my Chinese CNC3020T. I’ve been using 0.1mm 30° engraving bits for etching which have…
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 on a Xubuntu 14.04 LTS running the Xenomai-2.6.2.1 kernel version 3.5.7. it’s taken some time to get the configuration working and compiled since i didn’t want to use the live CD. the…
TDA2040 PCB layout…
backlit PCB layout of the TDA2040 solid-state amp i’ve been working on. i’m still using perf boards until i wrap my head around designing PCB layouts in EagleCAD. i do a lot of work in the dark.