The firmware for the electronic stamp is downloadable here:
inker-1.0.zip.
A movie of me using an earlier prototype (using another kind of cartridge) is
viewable here.
The pinout of the cartridge seems to be mis-printed in the magazine (amongst others,
R3 is missing)
so here is the correct pinout of the model 40 HP-cartridge:
Pinout cartridge. Seen when looked at the back of the
cartridge, with the printing head pointing downwards.
Gnd | Gnd | | Gnd | Gnd |
C1 | R |   | R | C |
R4 | Gnd |   | Gnd | R1 |
C2 | R |   | R | C |
R0 | Gnd |   | Gnd | R5 |
C3 | R |   | R | C |
R3 | Gnd |   | Gnd | R2 |
C4 | R6 |   | R7 | C |
R0-7 en C1-4 are used in the schematic, the rest isn't.
© Jeroen Domburg