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diff --git a/posts/2013-01-27-preamp-board-arrived.markdown b/posts/2013-01-27-preamp-board-arrived.markdown deleted file mode 100644 index aee96d9..0000000 --- a/posts/2013-01-27-preamp-board-arrived.markdown +++ /dev/null @@ -1,42 +0,0 @@ ---- -title: Stick preamp PCB arrived -tags: audio,pcb,DIY,preamp,chapman stick,free software ---- - - - -Today I received a package from Shenzhen containing ten printed circuit boards. -I ordered a single board through [a taobao store](http://taobao.com) for only -100 RMB (about USD 16), but I suppose there is not much of a -difference between the production costs of ten boards and that of one. - -The board is the heart of my two-channel Chapman Stick preamp / signal router. -It includes a cross-over circuit for the bass side, so that I can partition the -bass signal into two frequency ranges that can be routed and processed -independently. It has three very simple effect inserts (high bass, low bass, -and melody), two buffered outputs (both signals mixed down to mono or dual -mono), and a tuner output (which could be used for an on-stage monitor). - -The circuit and the board were designed using the -[free](http://www.fsf.org/about/what-is-free-software) programs -`gschem` and `pcb` of the excellent -[gEDA suite](http://www.geda-project.org). (For some odd reason `pcb` -is not available through the official Archlinux repositories; I -installed it through the Arch User Repository.) You can get my circuit -diagrams, the PCB layout, and custom footprints through the -[git repository](http://git.elephly.net/hardware/stick-preamp.git) I -set up for this project. - - - -The manufacturer only received the exported Gerber files that I checked with -`gerbv`. Sadly, I didn't realise that the silk screen layer would be printed on -the bottom side of the single-layer board, so the text on all ten boards is -mirrored. (I suppose I could get used to saying "TЯƎƧИI", but "YᗡO⅃ƎM" just -sounds weird.) Now I will have to carefully check the orientation of the -transistors before soldering them onto the board because I'm not sure whether -they have been mirrored when I designed the board. - -I'm still missing two or three parts (different component packages and power -line filtering), but I'll start soldering the first components to one of the -boards tonight. |