Firmware for the super funky dymFT, a needleprinter for dymo labels (the 9mm embossing variant). It's made from printer and CD-drive junk, an old PS2 keyboard and a 16x2 character display.
Click the picture to watch the video on vimeo.
As fonts we are using bitmap fonts. The code is inspired by the AdafruitGFX library. Most fonts in use, the so called UNSCII fonts are taken from this source and were transcoded to compatible bitmap fonts using the Adafruit font converter. Due to the low resolution of the printers y-Axis (maximum 10 pixel per column) only few fonts remain still readable when convertet. Nevertheless all the UNSCII fonts are looking nice because they were made for low resolution display.
| qty | part |
|---|---|
| 1 | Teensy 3.2 |
| 2 | DRV8825 stepper driver |
| 1 | CD-Rom Drive with stepper |
| 1 | stepper from old printer with gear reduction |
| 1 | servo motor (not the tiny ones) |
| some | rubber rollers from old printer |
| 1 | beefy power supply |
| 1 | pair of scissors |
| 1 | PS2 Keyboard (the ones without USB-Support work easiest, so get one with a grey and not a purple ps2-plug) |
| 1 | 16x2 LCD display |
| 1 | nice 12V solenoid |
| 4 | decorative feet |
| 1 | tiny speaker and a simple amp for funky sounds |
| 1 | beefy mosfet for driving the Solenoid (we used an IRF530 (might be overkill)) |
and some screws, metal junk, springs and resistors n‘ stuff.
| Key | Function |
|---|---|
| F1 | 5x7 Font |
| F2 | UNSCII regular |
| F3 | UNSCII alterntive |
| F4 | UNSCII thin |
| F5 | Times New Roman |
| F6 | UNSCII MCR |
| F7 | UNSCII fantasy |
| F8 | enabel key sound |
| F9 | cut |
| PRNT SCRN | start printing |
| PG_UP | move Label |
| PG_DOWN | move Label |
| arrow keys | move cursor |
| Pin | Function |
|---|---|
| 0 | / |
| 1 | / |
| 23 | Label detect |
| 3 | Stamping Solenoid |
| 4 | Label Enable |
| 5 | Label Step |
| 6 | Label Dir |
| 7 | Head Enable |
| 8 | Head Step |
| 9 | Head Dir |
| 10 | Cut servo pwm |
| 11 | Keyboard CLK |
| 12 | Keyboard DATA |
| 13 | Status LED |
| A14 | Sound |
| 14 | Head stop |
| 15 | cut servo enable |
| 16 | Display REG SEL |
| 17 | Display Enable |
| 18 | Display D1 |
| 19 | Display D2 |
| 20 | Display D3 |
| 21 | Display D4 |