2 layers
2 layers141 × 88.1 mm
Walldraw
Pontifex42/Walldraw7Walldraw / Wall plotter / Polargraph
- Size
- 141 × 88.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 47
- Nets
- 70
- Pads
- 212
- Tracks, vias
- 677, 52
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 4 Aug 2022
- Updated
- 21 Apr 2025
Overview
Walldraw is an open-source printed circuit board by Pontifex42, from the Pontifex42/Walldraw repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board of 141 × 88.1 mm with 47 parts on 70 nets, routed with 677 tracks and 52 vias.
It is built around the ESP32-WROOM-32D, ULN2003A and AMS1117-3.3, with the SI2302 among its other parts. Its parts include 14 capacitors, 10 resistors, 6 connectors, 5 ICs and 4 switches. It belongs with the ESP32 boards of this library.
Main components
4
ESP32-WROOM-32D
-- WiFi Modules ROHSEspressif SystemsWiFi Modules
ULN2003A
SOP-16-40℃~+85℃ 0.93mA 100uA 15pF 20uA 30V 50V Seven channels SOP-16 Darlington Transistor Arrays ROHSUMWDarlington Transistor Arrays
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SI2302
SOT-23-55℃~+150℃ 1 N-channel 120pF 1V 1W 20V 300pF 3A 4nC@4.5V 65mΩ@2.5V 80pF N-Channel SOT-23 MOSFETs ROHSYONGYUTAIMOSFETs
README
README.mdWalldraw
Vollständige Anleitung auf Deutsch ist in "Wandplotter.pdf". Find a german manual in the file "Wandplotter.pdf".
Parts
47| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | .1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C9, C10, C12, C13 |
| 4 | 30k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R6, R7, R8 |
| 3 | 470 | Capacitor_SMD:CP_Elec_8x10.5 | C8, C11, C14 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R10 |
| 2 | Stepper 28BYJ-48 | Connector_JST:JST_EH_B5B-EH-A_1x05_P2.50mm_Vertical | M1, M2 |
| 2 | ULN2003A | Package_SO:SOP-16_3.9x9.9mm_P1.27mm | U1, U2 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 22k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | 2A | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1 |
| 1 | 3x18650 | Eigene:LiIo18650x3_PCB_Mount | BT1 |
| 1 | 5.5mm | Connector_BarrelJack:BarrelJack_Horizontal | J1 |
| 1 | 50k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U4 |
| 1 | Boot | Eigene:TACTILE_SWITCH_SMD_6.0X3.5MM | S2 |
| 1 | Display | Eigene:OLED_1.3 | J5 |
| 1 | ESP32-WROOM-32D | Eigene:ESP32-WROOM-32 | U5 |
| 1 | FTDI | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J6 |
| 1 | LM2596_Breakout | Eigene:BuckConverter_LM2596_Breakout | U3 |
| 1 | LOGO | Eigene:FSM_Logo | G*** |
| 1 | Micro_SD_Card | Eigene:GCT-MEM2055-00-190-01-A | J2 |
| 1 | Motor_Servo_1 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | M3 |
| 1 | Reset | Eigene:TACTILE_SWITCH_SMD_6.0X3.5MM | S1 |
| 1 | RotaryEncoder_Switch | Eigene:EC11_Rotary_SMD | SW2 |
| 1 | SI2302 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | SW_Push_DPDT | Eigene:PS-22F02 | SW1 |
| 1 | Spare_1 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | Spare_2 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4 |
| 1 | Speaker | Eigene:HN9650B Buzzer | LS1 |
Similar boards
- 2 layers131.7 × 99.4 mm
- 2 layers39 × 42.8 mm
Watch v3
KIIT-Robotic-Society/Dharma_RoboFest4.0
Dharma Bot is a quadruped robotic dog featuring 12-DOF locomotion, real-time sensing, and a modular subsystem design.
79 parts4MIT - 4 layers130 × 90 mm
- 2 layers16.3 × 110.2 mm
ESP12E Smart Coaster
atom-robotics-lab/ThermoGlow-Coaster
This project is an ESP12E based Temperature Controlled Smart Coaster. The project uses the following: ESP12E Module 12 x WS2812B SMD LEDs MLX90614 Temperature Sensor I2C Module Power Bank Charge-Boost Module for…
50 parts5 - 2 layers35.6 × 16.8 mm
- 2 layers26.2 × 12.3 mm
- 2 layers34.4 × 10.1 mm
KiCAD PCB Design For Embedded Systems and Electronics Projects-2020
v76s/KiCAD-PCB-Design-For-Embedded-Systems-and-Electronics-Projects-2020
14 parts
Questions
How big is the Walldraw PCB?
It measures 141 × 88.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Walldraw use?
47 parts, built around the ESP32-WROOM-32D, ULN2003A, AMS1117-3.3 and SI2302. 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 Walldraw KiCad files?
From the Pontifex42/Walldraw repository on GitHub, at the commit this page was made from: the board is ESP32/KiCad/WallDraw/WallDraw.kicad_pcb and its schematic ESP32/KiCad/WallDraw/WallDraw.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Walldraw design in my own project?
Its repository publishes it under the GPL-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).