HardLabs

Orc

aramder·orc·hardware/orc.kicad_pcb

Orc PCB layout, top view — open source ESP32 board by aramder

About the Orc PCB

Orc is an open source ESP32 PCB design by aramder, published on GitHub under the Custom license license. It is a 2-layer board measuring 95 × 82 mm, with 81 components from 25 distinct parts.

Its main chip is the ESP32-C3-SuperMini, from the ESP32 family. Other key parts include the PCA9555PW, AMS1117-3.3, LMR50410, SN65HVD230 and ADuM1250ARZ-RL7. By type, the board carries 21 resistors, 20 transistors, 15 capacitors, 12 diodes, 7 ICs and 3 connectors.

It belongs with the iot & wireless designs in this gallery.

From the project

Open replacement controller board for surplus Motorola PMUN1046A relay boxes: ESP32-C3, CANopen control, 10 x 15 A channels. Independent project, not affiliated with Motorola Solutions.

A replacement controller board for surplus Motorola PMUN1046A relay boxes — same relays and enclosure; open CAN control over plain terminal blocks instead of the proprietary wired link to the radio.

Independent open-source project. Not affiliated with, endorsed by, or connected to Motorola Solutions, Inc. — see TRADEMARKS.md.

Safety: this switches high-current DC in a vehicle. It is not safety qualified and must not be used for safety-critical functions. Read DISCLAIMER.md before building anything.

Orc, from the project README
From the project README

Main components on the Orc

PCA9555PWAMS1117-3.3LMR50410SN65HVD230ESP32-C3-SuperMiniADuM1250ARZ-RL7

Orc bill of materials (BOM)

81 components, 25 distinct parts.

QtyPartRefs
1
PCA9555PW
U1
1
AMS1117-3.3
U2
2
LMR50410
U3, U4
1
SN65HVD230
U6
1
ESP32-C3-SuperMini
U7
1
ADuM1250ARZ-RL7
U9
10
MMBT3904
Q6, Q10, Q14, Q15, Q18, Q20, Q22, Q24 +2
10
AO3401A
Q8, Q12, Q16, Q17, Q19, Q21, Q23, Q25 +2
1
01x02
J5
1
5.08mm Screw Terminal
J6
1
Harness, 14-pos 0.1in THT
J7
1
SW_DIP_x04
SW2
11
SS34
D8, D9, D10, D11, D12, D13, D14, D15 +3
1
10x SS34
D17
2
SMDRI127-680MT
33uH
L3, L4
7
100nF 50V
C13, C17, C18, C19, C20, C21, C28
8
10uF 50V
C22, C23, C24, C25, C26, C27, C29, C30
1
10k 0.1%
R13
1
120 1%
R14
1
6.2k 1%
R18
Show 5 more
QtyPartRefs
1
2.7k 1%
R19
4
10k 1%
R20, R21, R22, R23
11
10k 5%
R26, R27, R28, R29, R30, R31, R32, R33 +3
1
24k 1%
R36
1
3k 1%
R37

Orc design files

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

Orc: common questions

What microcontroller does the Orc use?

The Orc is built around the ESP32-C3-SuperMini, from the ESP32 family.

How big is the Orc PCB?

The Orc measures 95 × 82 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Orc?

81 components, from 25 distinct parts. The full bill of materials is listed on this page.

Where can I download the Orc design files?

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

Can I use the Orc design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Orc 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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