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OmniDrive

TLNKhanh·OmniDrive·hardware/kicad/OmniDrive.kicad_pcb

OmniDrive PCB layout, top view — open source ESP32 board by TLNKhanh
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About the OmniDrive PCB

OmniDrive is an open source ESP32 PCB design by TLNKhanh, published on GitHub under the MIT license. It is a 2-layer board measuring 45 × 59.5 mm, with 66 components from 34 distinct parts.

Its main chip is the ESP32-WROOM-32E, from the ESP32 family. Other key parts include the CH340C, DRV8833PWP, CH224K, INA219A and ME6211C33M5. By type, the board carries 26 capacitors, 14 resistors, 9 ICs, 7 connectors, 5 diodes and 2 transistors.

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

From the project

A general-purpose dual motor driver board with ESP32.

Dual H-bridge motor driver + ESP32 + USB-C PD, squeezed into a 45×59.5mm 2-layer board.

I wanted a board that could work with a single USB-C port and have it drive two motors (or 2 pairs if configured) while able to measure the board's current draw.

- Drives 2 or 4 DC motors (configurable) with two DRV8833 H-bridges, one DRV8833 is optimal, up to 1.5A per channel. - Negotiates power over USB-C via CH224K to get 9V from power supply - Measures total motor current with an INA219 over I2C - Lets you program the ESP32 over USB through the CH340C, with automatic boot/reset - Breaks out power…

OmniDrive, from the project README
From the project README

Main components on the OmniDrive

CH340CDRV8833PWPCH224KINA219AESP32-WROOM-32EME6211C33M5ME6211C50M5

OmniDrive bill of materials (BOM)

66 components, 34 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
CH340C
U1
1
~
U2
2
DRV8833PWP
U3, U7
1
CH224K
U4
1
INA219A
U5
1
ESP32-WROOM-32E
U8
1
ME6211C33M5
U9
1
ME6211C50M5
U10
2
MMBT2222A
Q1, Q2
1
USB_C
J1
1
Battery
J2
1
Switch
J3
1
CONN_01X08
Conn_01x08
J4
1
CONN_01X03
Conn_01x03
J5
2
CONN_02X03_ODD_EVEN
Conn_02x03_Odd_Even
J8, J11
2
SW_Push
SW1, SW2
1
SS24
D1
2
RED
D3, D4
1
GREEN
D5
1
WS2812
D6
Show 14 more
QtyPartRefs
1
22U
22u
L1
4
10U
10u
C1, C5, C22, C25
9
0.1U
0.1u
C2, C4, C8, C15, C20, C21, C23, C24 +1
1
1u
C3
7
0.1u
C6, C28, C29, C30, C31, C32, C33
1
10u
C7
2
0.01U
0.01u
C16, C18
2
2.2U
2.2u
C17, C19
1
6.8K
6.8k
R1
3
1k
R2, R3, R4
2
0.1R
R5, R6
4
10K
10k
R7, R8, R9, R10
1
4.7K
4.7k
R11
3
4.7k
R13, R14, R15

OmniDrive design files

The KiCad project lives in the TLNKhanh/OmniDrive repository on GitHub; these links point at the commit this page was built from.

OmniDrive: common questions

What microcontroller does the OmniDrive use?

The OmniDrive is built around the ESP32-WROOM-32E, from the ESP32 family.

How big is the OmniDrive PCB?

The OmniDrive measures 45 × 59.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the OmniDrive?

66 components, from 34 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the OmniDrive design files?

From the TLNKhanh/OmniDrive repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the OmniDrive design in my own project?

Yes, under the terms of its MIT license, which TLNKhanh chose for the repository.

Can I test firmware for the OmniDrive 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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