[BREAKGLASS] Design files for the SeedHammer II hardware.
https://seedhammer.com
ad9120bad1
A USB PD power supply may decide to hard reset or otherwise power cycle the board, assuming we are a battery powered device. We're not, but the next best thing is the massive capacitor bank that keeps the engraver well-fed during its activation pulses. Perform a cheap power OR with Schottky diodes; the voltage drop is ok, even from a 5V non-PD supply because what really matters is keeping the 3.3V MCU alive. |
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| .github/workflows | ||
| cad | ||
| pcb | ||
| specs | ||
| .gitignore | ||
| go.mod | ||
| LICENSE | ||
| README.md | ||
SeedHammer II hardware
This repository contains the design files for the SeedHammer II machine.
PCB
The schematic and PCB are in KiCad format.
Generate production files (gerber, BOM, CPL) with the Go script:
$ cd pcb
$ PATH=$PATH:/path/to/kicad-cli go run .
Production boards are manufactured by JLCPCB with the following settings:
- Surface Finish: ENIG
- Material Type: FR4 TG155
- Stackup: JLC04161H-7628 (impedance controlled)
LCD
The LCD is a ER-TFT035IPS-6 with capacitive touch from buydisplay.com. The variant with resistive touch is not supported by the firmware.
CAD
The CAD files for the custom machine parts are in STEP format.