2 layers65 × 30 mm
Rgb to hdmi
hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
36 parts1kGPL-3.0
2 layers47.8 × 41 mm
Db synth
rafaelmartins/db-synthA MIDI-controlled mono-voice digital synthesizer built on top of the AVR DB microcontroller series.
- Size
- 47.8 × 41 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 36
- Nets
- 36
- Pads
- 132
- Tracks, vias
- 148, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Jul 2022
- Updated
- 1 Sep 2026
Overview
Db synth is an open-source printed circuit board by rafaelmartins, from the rafaelmartins/db-synth repository on GitHub. It is a 2-layer board of 47.8 × 41 mm with 36 parts on 36 nets, routed with 148 tracks and 0 vias.
Its parts include 12 capacitors, 7 resistors, 7 connectors, 2 ICs and 1 diode. It belongs with the audio and music boards of this library.
README
README.md[!IMPORTANT] Development has moved to https://git.rafaelmartins.com/rafaelmartins/db-synth. Please check https://git.rafaelmartins.com/ for details on how to contribute.
db-synth
A MIDI-controlled mono-voice digital synthesizer built on top of the AVR DB microcontroller series.
For documentation, please visit: https://rafaelmartins.com/p/db-synth/
Parts
36| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100n | db-synth:C_TDK_FA28 | C4, C5, C9, C12 |
| 4 | 1u | db-synth:C_TDK_FA28 | C1, C3, C6, C11 |
| 4 | JST XH 2P | db-synth:JST_XH_B2B-XH-A_PinSocket_1x02_P2.50mm_Vertical | J2, J4, J5, J7 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_Pad_Via | H1, H2, H3, H4 |
| 3 | 220R | db-synth:R_YAGEO_MFR-25FTE52_Horizontal | R2, R5, R6 |
| 2 | 2k2 | db-synth:R_YAGEO_MFR-25FTE52_Horizontal | R3, R4 |
| 2 | 4n7 | Capacitor_THT:C_Rect_L7.2mm_W4.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C7, C8 |
| 1 | 10k | db-synth:R_YAGEO_MFR-25FTE52_Horizontal | R7 |
| 1 | 10u | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C10 |
| 1 | 10u | db-synth:C_TDK_FA26 | C2 |
| 1 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1 |
| 1 | 330R | db-synth:R_YAGEO_MFR-25FTE52_Horizontal | R1 |
| 1 | 6N137 | Package_DIP:DIP-8_W7.62mm | U2 |
| 1 | AVR64DB28x-xSP | Package_DIP:DIP-28_W7.62mm | U1 |
| 1 | JST XH 3P | db-synth:JST_XH_B3B-XH-A_PinSocket_1x03_P2.50mm_Vertical | J6 |
| 1 | PA6 | db-synth:TestPoint_Keystone_5001_Miniature | TP1 |
| 1 | PA7 | db-synth:TestPoint_Keystone_5001_Miniature | TP2 |
| 1 | Pin Header 1x3 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | Pin Socket 1x4 | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J3 |
The 35 most common of 36 parts.
Questions
How big is the Db synth PCB?
It measures 47.8 × 41 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Db synth use?
36 parts. 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 Db synth KiCad files?
From the rafaelmartins/db-synth repository on GitHub, at the commit this page was made from: the board is pcb/db-synth.kicad_pcb and its schematic pcb/db-synth.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Db synth design in my own project?
Its repository states no licence, so its author keeps all rights: ask rafaelmartins before reusing the design.
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