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OpenRX-Lite

OpenDrone-hw·OpenRX-Lite·hardware/OpenRX-Lite.kicad_pcb

OpenRX-Lite PCB layout, top view — open source ESP32 board by OpenDrone-hw
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About the OpenRX-Lite PCB

OpenRX-Lite is an open source ESP32 PCB design by OpenDrone-hw, published on GitHub under the CERN-OHL-S-2.0 license. It is a 6-layer board measuring 10 × 11.5 mm, with 47 components from 28 distinct parts.

Its main chip is the ESP32-C3FH4, from the ESP32 family. Other key parts include the TLV75533PDQNR and SX1281IMLTRT. By type, the board carries 25 capacitors, 5 test points, 4 inductors, 4 resistors, 3 ICs and 2 antennas.

It belongs with the rf & radio, iot & wireless and wearables designs in this gallery.

From the project

Open-source 2.4 GHz ExpressLRS receiver with an on-board ceramic antenna.

Open-source 2.4 GHz ExpressLRS receiver for small FPV aircraft. OpenRX Lite combines an ESP32-C3 and SX1281 with an on-board ceramic link antenna in a 10.0 x 11.5 mm board.

Technical write-up, part list and layout constraints: AGENTS.md.

What pairs with what, and what is available: opendrone.be.

Hardware licensed under CERN-OHL-S-2.0, see LICENSE.

OpenRX-Lite, from the project README
From the project README

Main components on the OpenRX-Lite

ESP32-C3FH4TLV75533PDQNRSX1281IMLTRT

OpenRX-Lite bill of materials (BOM)

47 components, 28 distinct parts.

QtyPartRefs
1
ESP32-C3FH4
ESP32-C3
Espressif Systems
U1
1
TLV75533PDQNR
TI
U2
1
SX1281IMLTRT
SEMTECH
U3
1
CJ17-400001010B20
JSCJ
X1
1
2450AT18A100E
Johanson Dielectrics
AE1
1
479480001
47948-0001
MOLEX
AE2
1
2450FM07D0034T
JOHANSON(约翰逊)
FL1
1
OW7EL89CENUNFAYLC-52M
YXC Crystal Oscillators
OSC1
1
RX
TP1
1
TX
TP2
1
5V
TP3
1
GND
TP4
1
BOOT
TP5
1
XL-1010RGBC-2812B
XL-1010RGBC-WS2812B
XINGLIGHT
D1
1
LQP03TN24NH02D
24nH
muRata
L1
1
LQP03TN2N5C02D
2.5nH
muRata
L2
1
LQP03TN2N0B02D
2.0nH
muRata
L3
1
MLZ2012M150WT000
15uH
Murata Electronics
L4
2
GRM0335C1H150JA01D
15pF
muRata
C1, C3
6
GRM033R61A105ME44D
1uF
muRata
C4, C10, C15, C23, C25, C28
Show 8 more
QtyPartRefs
7
GRM033R61E104KE14D
100nF
muRata
C5, C6, C9, C12, C13, C14, C17
2
CL05A106MQ5NUNC
10uF
Samsung Electro-Mechanics
C8, C16
1
GRM155R60J106ME44D
10uF
muRata
C11
1
0201B102K500NT
1nF
FH
C19
1
GRM033R60J474KE90D
470nF
muRata
C20
2
GRM0335C1H1R2BA01D
1.2pF
muRata
C21, C22
3
GRM033R61A103KA01J
10nF
muRata
C24, C26, C27
4
RC0201FR-0710KL
10k
YAGEO
R2, R3, R4, R5

OpenRX-Lite design files

The KiCad project lives in the OpenDrone-hw/OpenRX-Lite repository on GitHub; these links point at the commit this page was built from.

OpenRX-Lite: common questions

What microcontroller does the OpenRX-Lite use?

The OpenRX-Lite is built around the ESP32-C3FH4, from the ESP32 family.

How big is the OpenRX-Lite PCB?

The OpenRX-Lite measures 10 × 11.5 mm, has 6 copper layers and is 1 mm thick.

How many components are on the OpenRX-Lite?

47 components, from 28 distinct parts. The full bill of materials is listed on this page.

Where can I download the OpenRX-Lite design files?

From the OpenDrone-hw/OpenRX-Lite repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the OpenRX-Lite design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which OpenDrone-hw chose for the repository.

Can I test firmware for the OpenRX-Lite 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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