2 layers95 × 99 mm
Braille Column Rods PCB
KilowattSynthesis/Braille-Display-CAD
Experimental design for a braille display using build123d CAD in Python
151 partsCERN-OHL-P-2.0
2 layers95 × 99 mm
Braille Column Rods PCB
KilowattSynthesis/Braille-Display-Column-RodsBraille display POC using tiny stepper motors to drive columns of the display
- Size
- 95 × 99 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 161
- Nets
- 208
- Pads
- 648
- Tracks, vias
- 1,963, 277
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 3 Feb 2025
- Updated
- 30 Aug 2025
Overview
Braille Column Rods PCB is an open-source printed circuit board by KilowattSynthesis, from the KilowattSynthesis/Braille-Display-Column-Rods repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 95 × 99 mm with 161 parts on 208 nets, routed with 1,963 tracks and 277 vias.
It is built around the MT9101ET, 74HC595 and CD74HC4067M, with the RP2040-ZERO among its other parts. Its parts include 46 resistors, 41 capacitors, 29 ICs, 19 diodes and 6 connectors. It belongs with the robots and motor control boards and the RP2040 boards of this library.
Main components
4
MT9101ET
SOT-23-40℃~+150℃ 1.5mV/Gs 3V~5.5V 6.7mA Rail-to-rail output ±1.5% ±10%/℃ ±146.6mT SOT-23 Linear Hall Sensors ROHSNOVOSENSELinear Hall Sensors
74HC595
SOP-16-40℃~+85℃ 1 100ns@5V,50pF 10MHz 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOP-16 Shift Registers ROHSGRShift Registers
CD74HC4067M
SOIC-24-300mil-55℃~+125℃ 16 160Ω 16:1 22ns 2V~6V 345ns 365ns 89MHz Bidirectional analog channel、Glitch-free switching SOIC-24-300mil Analog Switches, Multiplexers ROHSTexas InstrumentsAnalog Switches, Multiplexers
RP2040-ZERO
-- Development Boards & Kits ROHSWaveshareDevelopment Boards & Kits
README
README.mdBraille-Display-Column-Rods
Braille display POC using tiny stepper motors to drive columns of the display
Type 4 Braille Display
Parts
161| Qty | Value | Footprint | References |
|---|---|---|---|
| 29 | 5k1 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R3, R12, R13, R16, R17, R18, R19, R22, R23, R26, R27, R30, R31, R34 +13 |
| 24 | 100n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2, C3, C14, C15, C17, C18, C19, C20, C21, C22, C23, C24, C33, C35, C103 +8 |
| 16 | 330m | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R6, R7, R10, R11, R14, R15, R20, R21, R24, R25, R28, R29, R32, R33, R36, R37 |
| 12 | 4.7n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C25, C26, C27, C28, C29, C30, C31, C32, C34, C36, C38, C40 |
| 12 | MT9101ET | 00-lib-footprints:SOT-23-Hall | U17, U18, U19, U20, U21, U22, U23, U24, U25, U26, U27, U28 |
| 11 | LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2, D3, D4, D12, D13, D14, D15, D17, D18, D19, D20 |
| 8 | DRV8847SPWR | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U1, U2, U4, U5, U6, U7, U8, U9 |
| 8 | RED_LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1, D5, D6, D7, D8, D9, D10, D11 |
| 8 | Stepper_Motor_bipolar | 00-lib-footprints:MicroStepper_4.7_OD | M1, M2, M3, M4, M5, M6, M7, M8 |
| 4 | 10u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C10, C11, C12, C13 |
| 4 | AD116_or_BDR6120S | Package_TO_SOT_SMD:SOT-23-6 | U10, U11, U12, U13 |
| 4 | BrailleCell | 00-lib-footprints:BrailleCell | H3, H4, H5, H6 |
| 4 | Motor_DC_With_MP | 00-lib-footprints:DC_Motor_6mm_OD_with_3_Stage_Gearbox | M9, M10, M11, M12 |
| 2 | 74HC595 | Package_SO:SOP-16_3.9x9.9mm_P1.27mm | U14, U15 |
| 2 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3, J7 |
| 2 | MountingHole_Pad | 00-lib-footprints:Braille_Block_MountingHoles_M2_3x | H1, H2 |
| 2 | Screw_Terminal_01x02 | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J5, J6 |
| 2 | Tactile Button, 160gf | PCM_JLCPCB:SW-SMD_4P-L5.1-W5.1-P3.70-LS6.5-TL-2 | SW1, SW2 |
| 1 | 0.1R | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R103 |
| 1 | 10u | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C9 |
| 1 | CD74HC4067M | Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm | U30 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | Conn_01x08 | 00-lib-footprints:SOICbite_clipProgSmall | J4 |
| 1 | INA219AxD | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U103 |
| 1 | RP2040-Zero | 00-lib-footprints:RP2040 Zero | U3 |
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Questions
How big is the Braille Column Rods PCB PCB?
It measures 95 × 99 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Braille Column Rods PCB use?
161 parts, built around the MT9101ET, 74HC595, CD74HC4067M and RP2040-ZERO. 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 Braille Column Rods PCB KiCad files?
From the KilowattSynthesis/Braille-Display-Column-Rods repository on GitHub, at the commit this page was made from: the board is Braille-Column-Rods-PCB/Braille-Column-Rods-PCB.kicad_pcb and its schematic Braille-Column-Rods-PCB/Braille-Column-Rods-PCB.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Braille Column Rods PCB design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).