2 layers172.7 × 44.4 mm
Eight by
todbot/eight_by
An 8-knob + 8 buttons + eight RGB LEDs board, all controllable with only 8 pins
42 partsGPL-3.0
2 layers198.9 × 48.4 mm
Eight by qtpy
todbot/eight_byAn 8-knob + 8 buttons + eight RGB LEDs board, all controllable with only 8 pins
- Size
- 198.9 × 48.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 53
- Nets
- 64
- Pads
- 216
- Tracks, vias
- 406, 44
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 30 May 2024
- Updated
- 16 Jun 2025
Overview
Eight by qtpy is an open-source printed circuit board by todbot, from the todbot/eight_by repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 198.9 × 48.4 mm with 53 parts on 64 nets, routed with 406 tracks and 44 vias.
It is built around the 74HC4051, TC-1103-C-D and WS2812B. Its parts include 12 capacitors, 10 diodes, 10 switches, 4 resistors and 3 ICs.
Main components
3
74HC4051
SOP-16-40℃~+85℃ 1 170MHz 28ns 29ns 3V~9V 5ns 5pF 80Ω 8:1 SOP-16 Analog Switches, Multiplexers ROHSWuxi I-core ElecAnalog Switches, Multiplexers
TC-1103-C-D
插件-4P,12x12mm-30℃~+85℃ 100,000 cycles 12V 12mm 12mm 2.6N 5.5mm 50mA Black No PC Pin Round Button SPST Through Hole Without Bracket 插件-4P,12x12mm Tactile Switches ROHSXKB ConnectionTactile Switches
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
README
README.mdeight_by
An 8-knob + 8 buttons + eight RGB LEDs board,
all controllable with only 8 pins
Pot options:
- 9mm Song Hui trimmer pots B10K - synthcube
- Just about any other 9mm pot
Buttons are:
- 12mm tact (LCSC C561260)
Parts
53| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 100n | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12 |
| 10 | TC-1103-C-D | easyeda2kicad:SW-TH_4P-L12.0-W12.0-P5.00-LS12.5 | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10 |
| 10 | WS2812B | LED_SMD:LED_WS2812B-Mini_PLCC4_3.5x3.5mm | LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8, LED9, LED10 |
| 8 | R_Potentiometer | Potentiometer_THT:Potentiometer_Alps_RK09K_Single_Vertical | RV1, RV2, RV3, RV4, RV5, RV6, RV7, RV8 |
| 4 | MountingHole | MountingHole:MountingHole_2.5mm | H1, H2, H3, H4 |
| 2 | 74HC4051 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U1, U2 |
| 1 | 10 | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 33 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 470 | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | AudioJack4 | todbot_stuff:Jack_3.5mm_PJ320D_Horizontal | J2 |
| 1 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J1 |
| 1 | ~ | todbot_eagle2023:QTPY_TH_HEADERSOCKET | U3 |
More from todbot/eight_by
1Similar boards
- 4 layers99 × 53.3 mm
PSLab
fossasia/pslab-hardware
PSLab Hardware Design and Schematics https://pslab.io
199 parts1.7kApache-2.0 - 2 layers85.6 × 88.9 mm
OM Landroid MB
rich21044/Openmower-for-Landroid-WR141E
Taking the hardware developed as part of ClemensElfleins work on Openmower and adapting it to fit a 2019 Landroid WR141E.
126 parts8GPL-3.0 - 2 layers240 × 239.9 mm
KiCad chessLab
dev-campusfab/chessLab
Interactive Chess board that brings visuals to the game and can help the player to learn.
295 parts2AGPL-3.0 - 4 layers90 × 77.9 mm
Lighting Tile Circuit V3
OA-Designs/LED-TILE
Modular decorative LED tiles in multiple shapes (hex, square, triangle...) sharing one PCB design. Tiles connect edge-to-edge to share power and sync lighting effects across a network.
77 partsGPL-3.0 - 4 layers136 × 95 mm
- 2 layers
- 2 layers66 × 81 mm
Kabeltester v2
luhbots/luhsoccer_electronics
The eletronics projects of our robots and basestation.
67 parts2 - 2 layers180 × 170 mm
Questions
How big is the Eight by qtpy PCB?
It measures 198.9 × 48.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Eight by qtpy use?
53 parts, built around the 74HC4051, TC-1103-C-D and WS2812B. 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 Eight by qtpy KiCad files?
From the todbot/eight_by repository on GitHub, at the commit this page was made from: the board is schematics/eight_by_qtpy/eight_by_qtpy.kicad_pcb and its schematic schematics/eight_by/eight_by.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Eight by qtpy design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).