HardLabs

FMTransceiver

Longing-Ingernot·FMTransceiver·src/pcb/FMTransceiver.kicad_pcb

FMTransceiver PCB layout, top view — open source ESP32 board by Longing-Ingernot

About the FMTransceiver PCB

FMTransceiver is an open source ESP32 PCB design by Longing-Ingernot, published on GitHub under the MIT license. It is a 4-layer board measuring 100 × 69.4 mm, with 64 components from 38 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the KT0803L, RDA5807M, TDA7297, AMS1117-3.3 and MP2672GD-XXXX-Z. By type, the board carries 19 capacitors, 17 resistors, 7 ICs, 6 switches, 5 connectors and 2 battery holders.

It belongs with the rf & radio designs in this gallery.

From the project

This is an FM radio transmitter and receiver, all in one, built around an ESP32-S3, a KT0803L

This is an FM radio transmitter and receiver, all in one, built around an ESP32-S3, a KT0803L

transmitter chip, and an RDA5807M receiver chip. Plug an antenna into whichever port matches what

you want to do, plug a 3.5mm source into the line-in jack if you want to transmit to the FM band,

and you're set. It's battery-powered, so you can take it with you when you're on the go too :)

FMTransceiver, from the project README
From the project README

Main components on the FMTransceiver

KT0803LESP32-S3-WROOM-1RDA5807MTDA7297AMS1117-3.3MP2672GD-XXXX-ZER_OLEDM0.91_1x-I2C

FMTransceiver bill of materials (BOM)

64 components, 38 distinct parts.

QtyPartRefs
1
KT0803L
IC1
1
ESP32-S3-WROOM-1
U1
1
RDA5807M
U2
1
TDA7297
U3
1
AMS1117-3.3
U4
1
MP2672GD-XXXX-Z
U5
1
ER_OLEDM0.91_1x-I2C
U6
1
32.768KHz
Y1
1
RX_ANT CONN
J1
1
AudioJack3_SwitchTR
J2
1
AudioJack3
J3
1
Conn_Coaxial
J4
1
USB_C_Plug_USB2.0
P1
2
LiPO
BT1, BT2
2
Speaker
LS1, LS2
1
10k
RV1
6
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6
1
RTH
TH1
2
LED
D1, D2
1
1.5uH
L1
Show 18 more
QtyPartRefs
7
0.1uF
C1, C3, C10, C11, C12, C14, C19
2
1uF
C2, C18
2
100uF
C4, C5
2
0.22uF
C6, C7
2
15uF
C8, C9
1
470uF
C13
2
22uF
C15, C16
1
10uF
C17
5
10k
R1, R3, R4, R7, R11
2
5.1k
R2, R17
2
4.7k
R5, R6
1
R
R8
1
12k
R9
1
28.7k
R10
1
32k
R12
2
1k
R13, R14
1
12.6k
R15
1
3.6k
R16

FMTransceiver design files

The KiCad project lives in the Longing-Ingernot/FMTransceiver repository on GitHub; these links point at the commit this page was built from.

FMTransceiver: common questions

What microcontroller does the FMTransceiver use?

The FMTransceiver is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the FMTransceiver PCB?

The FMTransceiver measures 100 × 69.4 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the FMTransceiver?

64 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the FMTransceiver design files?

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

Can I use the FMTransceiver design in my own project?

Yes, under the terms of its MIT license, which Longing-Ingernot chose for the repository.

Can I test firmware for the FMTransceiver 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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