D 2012-12-02T21:46:33.137
L Notes
U jos
W 1085
Original Contents of file notes.txt as contained in file "Pulse2Tone_2012_01_22.zip"
(Hyperlinks added by JvK)
(The PDF-file only contains a picture, which is directly stored as JPG in this repository)
main.c - source code main.h - header file Schematic_v1-0.png - adapter schematic wd_we500c-d.pdf - phone schematic Source code compiled with AVR Studio v4.18 + WinAVR for attiny45, optimization -O1. SUT_CKSEL fuse should be programmed for external 8 Mhz crystal oscillator. The converter originally designed to be mounted/wired inside the phone. It has to be connected in parallel to the phone line, but _after_ the hook switch, e.g. between terminals C and F/RR on the phone schematic. Rotary dial (all 4 wires) has to be disconnected from the phone and wired to the adapter (see schematic). The adapter is polarity sensitive. Terminal C is just a solder pad, so I ended up using L2 instead (itÂ’s a nice screw terminal).End of notes Z 35a77b69ed289a698ab34208681e2322