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Raster bot

rhammell·raster-bot·hardware/Raster_Bot/Raster_Bot.kicad_pcb

Raster bot PCB layout, top view — open source ESP32 board by rhammell

About the Raster bot PCB

Raster bot is an open source ESP32 PCB design by rhammell, published on GitHub. It is a 4-layer board measuring 65 × 28 mm, with 63 components from 34 distinct parts.

Its main chip is the ESP32-S3-MINI-1, from the ESP32 family. Other key parts include the BQ24072RGT, DRV8833PWPR, AP2114H-3.3 and TPS61023DRLR. By type, the board carries 22 capacitors, 19 resistors, 5 ICs, 5 connectors, 5 diodes and 3 transistors.

It belongs with the displays & leds, power & battery and robotics & motion designs in this gallery.

From the project

Raster is a two-wheeled bot featuring a touchscreen display

Raster Bot is a compact, two-wheeled differential-drive robot built around an ESP32 and a capacitive touchscreen display. The project is fully open: it includes the custom PCB, the 3D-printable mechanical design, the firmware (packaged as an Arduino library), and the source graphics.

The firmware provides closed-loop motor control with quadrature encoders and PID speed regulation, battery/charge monitoring, and a touchscreen UI — all wrapped in a simple high-level API so sketches can drive the bot in a few lines.

Main components on the Raster bot

ESP32-S3-MINI-1BQ24072RGTDRV8833PWPRAP2114H-3.3TPS61023DRLR

Raster bot bill of materials (BOM)

63 components, 34 distinct parts.

QtyPartRefs
1
ESP32-S3-MINI-1
U1
1
BQ24072RGT
U2
1
DRV8833PWPR
U3
1
AP2114H-3.3
U4
1
TPS61023DRLR
U5
2
AO3401A
Q1, Q3
1
2N7002
Q2
1
JST_PH
J1
1
USB_C_Receptacle_USB2.0_16P
J2
1
Conn_EYESPI
J3
2
Conn_Motor_N20_Encoder
J4, J5
1
SW_RESET
SW1
1
SW_BOOT
SW2
1
SW_SPDT_SH
SW3
2
SD103AW
D1, D2
3
LED
D3, D4, D5
1
1uH
L1
1
1uF
C1
5
0.1uF
C2, C3, C7, C14, C19
5
22uF
C4, C12, C18, C21, C22
Show 14 more
QtyPartRefs
1
100uF
C5
6
10uF
C6, C9, C10, C15, C16, C20
2
470uF
C8, C17
1
2.2uF
C11
1
0.01uF
C13
4
10k
R1, R7, R8, R12
4
100k
R2, R3, R4, R11
2
5.1k
R5, R6
1
1.1k
R9
1
2.7k
R10
2
300m
R13, R14
3
4.7k
R15, R18, R19
1
220k
R16
1
30k
R17

Raster bot design files

The KiCad project lives in the rhammell/raster-bot repository on GitHub; these links point at the commit this page was built from.

Raster bot: common questions

What microcontroller does the Raster bot use?

The Raster bot is built around the ESP32-S3-MINI-1, from the ESP32 family.

How big is the Raster bot PCB?

The Raster bot measures 65 × 28 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Raster bot?

63 components, from 34 distinct parts. The full bill of materials is listed on this page.

Where can I download the Raster bot design files?

From the rhammell/raster-bot repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Raster bot design in my own project?

The repository has no license, so all rights stay with rhammell. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Raster bot without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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