HardLabs

Radiocore

ansemjo·chronovfd·radiocore/radiocore.kicad_pcb

Radiocore PCB layout, top view — open source ESP32 board by ansemjo

About the Radiocore PCB

Radiocore is an open source ESP32 PCB design by ansemjo, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 75 × 40 mm, with 46 components from 40 distinct parts.

Its main chip is the USBLC6-4SC6, from the ESP32 family. Other key parts include the AP2114H-3.3TRG1, SN74HCT245PWR, DS1338Z-33+T&R and 2026. By type, the board carries 14 capacitors, 14 resistors, 5 ICs, 3 connectors, 2 switches and 2 inductors.

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

From the project

hardware project for a clock around a russian ivl2-5/7 vfd and an esp32-wroom module

Skyworks Si4706 FM radio receiver with RDS decoder, to get time signal "from the air" DS1338 RTC with coin cell battery backup, to keep accurate time over long periods and without power ESP32-C3 as a simple-to-program-over-USB controller chip, which conveniently also includes WiFi capability, if you prefer NTP over RDS vertical GCT USB4145 USB-C connector, so a final assembly with two sandwiched boards will have the cable coming in from the back

Radiocore, from the project README
From the project README

Main components on the Radiocore

AP2114H-3.3TRG1SN74HCT245PWRDS1338Z-33+T&RUSBLC6-4SC62026

Radiocore bill of materials (BOM)

46 components, 40 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
AP2114H-3.3TRG1
Si4706-D50-GM
Diodes Inc.
U1
1
SN74HCT245PWR
TLV75733PDBV
Texas Instruments
U2
1
DS1338Z-33+T&R
DS1338Z-33+
Maxim
U4
1
USBLC6-4SC6
ST Microelectronic
U5
1
USBLC6-4SC6
ESP32-C3-WROOM-02
ST Microelectronic
U6
1
2026
A1
1
MBT3904DW1T1G
BSD840NH6327XTSA1
ON Semiconductor
Q1
1
ECS-.327-12.5-13FLX-C
32.786kHz
ECS Inc.
Y1
1
PREC040DBAN-M71RC
Header
Sullins
J1
1
PRPC040DAAN-RC
I2C
Sullins
J2
1
GCT USB4145 (vertical)
J4
1
Wire Antenna
AE1
1
1058
Keystone 1058 (CR2032)
Keystone
BT1
1
CKN12221-1
Boot
C&K
SW1
1
CKN12221-1
Reset
C&K
SW2
1
VEMD1060X01
SK6812
Vishay
D1
1
220ΩZ
FB2
1
15nH
L1
1
CL21A475KAQNNNE
10nF
Samsung
C1
1
CL21A475KAQNNNE
100nF
Samsung
C2
Show 20 more
QtyPartRefs
1
CL21B102KBANNNC
10µF
Samsung
C3
3
CL21B104KACNNNC
100nF
Samsung
C4, C12, C18
1
CL21A106KOQNNNE
4.7pF
Samsung
C5
1
CL21B105KAFNNNG
220pF
Samsung
C6
2
CL21B104KACNNNC
1µF
Samsung
C7, C8
1
CL21B105KAFNNNG
1µF
Samsung
C9
1
CC0805JRNPO9BN470
220µF
Yageo
C10
1
CC0805JRNPO9BN470
100nF
Yageo
C11
1
100nF
C16
1
RC0805FR-071ML
10kΩ
Yageo
R1
1
RC0805FR-0710KL
10kΩ
Yageo
R2
1
RC0805FR-072K2L
10kΩ
Yageo
R4
2
RC0805FR-074K7L
10kΩ
Yageo
R5, R6
1
RC0805FR-071KL
5.1kΩ
Yageo
R7
1
RC0805FR-074K7L
4.7kΩ
Yageo
R8
2
RC0805FR-0710KL
4.7kΩ
Yageo
R9, R10
2
RC0805JR-075K1L
4.7kΩ
Yageo
R11, R12
1
RC0805FR-0727RL
10kΩ
Yageo
R13
1
RC0805FR-0710KL
5.1kΩ
Yageo
R15
1
10kΩ
R20

Radiocore design files

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

Radiocore: common questions

What microcontroller does the Radiocore use?

The Radiocore is built around the USBLC6-4SC6, from the ESP32 family.

How big is the Radiocore PCB?

The Radiocore measures 75 × 40 mm, has 2 copper layers and is 1.6002 mm thick.

How many components are on the Radiocore?

46 components, from 40 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 Radiocore design files?

From the ansemjo/chronovfd 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 Radiocore design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which ansemjo chose for the repository.

Can I test firmware for the Radiocore 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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