2 layers48.3 × 63.5 mm
Display controller
hmcty/microwave
All software and hardware for running the microwave food simulator.
10 parts
2 layers38.1 × 55.9 mm
Display driver
hmcty/microwaveAll software and hardware for running the microwave food simulator.
- Size
- 38.1 × 55.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 15
- Nets
- 62
- Pads
- 104
- Tracks, vias
- 26, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 May 2026
- Updated
- 18 Jul 2026
Overview
Display driver is an open-source printed circuit board by hmcty, from the hmcty/microwave repository on GitHub. It is a 2-layer board of 38.1 × 55.9 mm with 15 parts on 62 nets, routed with 26 tracks and 0 vias.
It is built around the ULN2803A and TBD62783APG. Its parts include 10 resistors, 3 ICs and 2 connectors. It belongs with the lEDs and displays boards of this library.
Main components
2README
README.mdmicrowave
All software and hardware for running the microwave food simulator.
Microwave food simulator is a decommissioned LG microwave. It's been paired with a custom human-sized turntable, and a LINAK height-adjustable desk.
Layout
|-- apps/
| |-- cabin-control/ # RPi service for cabin LEDs, fans, etc.
| |-- display-controller/ # Teensy 4.1 firmware for panel display
| |-- table-controller/ # Teensy 4.0 firmware for turntable control and height adjustment
| |-- mw-cli/ # App to command other services/controllers
| |-- mw-hub/ # RPi service to bridge communication between MCUs and other services
| |-- mw-orchestrator/ # App to execute YAML command sequences
| `-- mw-viewer/ # App to stream and record cabin video streams
|-- crates/
| |-- linak-protocol/ # LINAK frame parser and types
| |-- mw-cmd/ # Command arg parsers (shared between CLI and orchestrator)
| |-- mw-comms/ # Host/device communication drivers and settings
| |-- mw-msgs/ # Message types and serialization
| `-- turntable/ # Turntable state machine
|-- hardware/
| |-- display_controller/ # KiCAD design for display control protoboard
| |-- display_driver/ # KiCAD design for LED common anode display driver
| `-- table_controller/ # KiCAD design for table control protoboard
|-- routines/ # YAML command sequences for the orchestrator
|-- scripts/
| |-- cam-stream.service # systemd unit for camera streaming
| `-- cam_stream_ffmpeg.sh # script to stream camera feed via ffmpeg
|-- flash.sh # build and flash Teensy firmware (buttonless)
`-- install.sh # build and update RPi servicesBuild
Install the target once:
rustup target add thumbv7em-none-eabihfFlashing firmware
flash.sh builds a firmware app, converts it to a .hex, and loads it onto its
Teensy. The supported apps are table-controller (Teensy 4.0) and
display-controller (Teensy 4.1).
One-time setup:
cargo install cargo-binutils # provides `cargo objcopy`
rustup component add llvm-toolsYou also need teensy_loader_cli installed.
To build, convert, and flash:
./flash.sh table-controllerBefore flashing, the script asks the running firmware to drop into the
bootloader over USB (via mw-cli), so no program-button press is needed.
Flags:
-s: build only, skipping the.hexconversion and flashing.-n: skip the auto-reboot into the bootloader. Use it for first-time setup, when no firmware is running yet to receive the command — press the Teensy's program button instead.
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8, R9, R10 |
| 2 | ULN2803A | Package_DIP:DIP-18_W7.62mm | U1, U2 |
| 1 | Conn_01x14_Socket | Connector_PinHeader_2.54mm:PinHeader_1x14_P2.54mm_Vertical | J2 |
| 1 | Conn_02x08_Odd_Even | Connector_IDC:IDC-Header_2x08_P2.54mm_Vertical | J1 |
| 1 | TBD62783APG | TBD62783APG:P-DIP18-300-2p54-001_TOS | U4 |
Questions
How big is the Display driver PCB?
It measures 38.1 × 55.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Display driver use?
15 parts, built around the ULN2803A and TBD62783APG. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Display driver KiCad files?
From the hmcty/microwave repository on GitHub, at the commit this page was made from: the board is hardware/display_driver/display_driver.kicad_pcb and its schematic hardware/display_controller/display_controller.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Display driver design in my own project?
Its repository states no licence, so its author keeps all rights: ask hmcty before reusing the design.
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