X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=Notebook;h=8a74177b28383d9f6f9b915e9bb8de440ba704e5;hb=refs%2Fheads%2Ftooexpensive;hp=96d03c82a1f8f167dc76b0854639cbc0c690a4d5;hpb=ca70acaf3e49fdbe952c63f8ce987ca8457c1f1c;p=hw%2Fteleterra diff --git a/Notebook b/Notebook index 96d03c8..8a74177 100644 --- a/Notebook +++ b/Notebook @@ -3,3 +3,39 @@ 2009.06.01 - keithp wants a compass ... HMC5843 + +2010.10.30 +- v0.1 boards arrived + + issues: + - holes for the LCD leads are too small + - for prototypes, workaround is remove pins from LCD module + and use wire-wrap wire to connect the 14 leads + + - footprint for U17 (audio amp) is too wide .. need narrower SOIC 8 + - for prototypes, existing footprint will work with careful + placement of the part and/or hand soldering after reflow + +2010.10.31 +- loaded and reflowed two boards + + - some silkscreen work is in order .. U1/U2 refdes could be better + positioned .. spots on IC's marking pin 1 should be outside chip + + - tqfp footprint for tiny48 seems "largeish" .. not fatally, but + leaves me questioning a bit + + - kapton paste mask worked, but was harder to use than stainless + +2010.11.22 +- notes from initial turn on before I forget + + - the footprint for the AVR ICSP connector is mirror-imaged! + + - it's easy to crowbar the 3.3V rail by over-driving the audio amp. + can we run it from unregulated lipo instead? Would be nice to do + that, then crank up the gain. + +2011.03.14 +- if we move off speaker to an earphone jack, perhaps DK CP-3523SJCT-ND ? +