HardLabs

PDX

kholia·Easy-Transceiver·PDX++/PDX.kicad_pcb

PDX PCB layout, top view — open source RP2040/RP2350 board by kholia

About the PDX PCB

PDX is an open source RP2040/RP2350 PCB design by kholia, published on GitHub. It is a 2-layer board measuring 97.1 × 97 mm, with 86 components from 56 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the CD2003GB_GP, SI535X_Module, 74ACT244, uSDX_LPF_BAND_MODULE and CDIL_7805_TO220. By type, the board carries 28 capacitors, 10 diodes, 10 resistors, 6 connectors, 6 test points and 5 ICs.

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

From the project

Easy Digital 'FT8' Transceiver. Easy-Transceiver v0.01.

A port of https://github.com/WB2CBA/ADX/ to Raspberry Pi Pico.

The live FT8 audio can also be decoded on PC / RPi / Android phone.

Note: The PCB part is WIP (work-in-progress) at the moment.

- Easy inbuilt and self-sufficient Si5351 calibration

- Native FT8 decoding on the Pico (via AA1GD)

- Native spotting (reporting to PSKReporter.info)

- Inbuilt BCI (broadcast interference) filter

Main components on the PDX

CD2003GB_GPSI535X_Module74ACT244uSDX_LPF_BAND_MODULECDIL_7805_TO220

PDX bill of materials (BOM)

86 components, 56 distinct parts.

QtyPartRefs
1
CD2003GB_GP
U1
1
SI535X_Module
U2
1
74ACT244
U3
1
uSDX_LPF_BAND_MODULE
U4
1
CDIL_7805_TO220
U5
4
BS170
Q1, Q2, Q3, Q4
1
SPK
CON1
1
MIC
CON2
1
SMA
J1
1
BNC
J1A1
1
12v (Max 18v)
J2
1
IO
J3
1
CAT
CAT1
1
—
CX1
1
—
GND1
1
Conn_01x02
GPS1
2
Jumper_2_Open
JP1, JP2
1
Filter-Skip
JP3
1
Conn_01x08
TFT1
1
CLK0
TP1
Show 36 more
QtyPartRefs
1
CLK1
TP2
2
TestPoint
TP3, TP4
1
GND
TP7
1
CAL
TP8
3
—
TP_D1, TP_G1, TP_S1
1
Pico
XA1
1
5.6V 5W
D1
1
1N4001
D2
4
1N4148
D3, D4, D11, D12
1
1N4148
D6
2
1N4148
D7, D8
1
1N5817
D9
1
1uH
L1
1
100uH
L2
3
2.2uH
L4, L5, L6
10
100nF
C3, C6, C8, C9, C10, C14, C15, C21 +2
2
10nF
C4, C5
1
470nF
C7
1
620pF
C11
2
10nF
C12, C17
1
10uF/16V
C13
1
100uF/16V
C16
1
10uF/16V
C18
3
100nF
C19, C20, C25
1
100uF/16V
C24
1
10uF
C26
2
2.2nF
C27, C30
2
820
C28, C29
1
1M
R1
1
4.7k
R2
2
10k
R3, R4
1
330
R5
2
10k
R6, R7
1
2.7k
R12
1
1k
R13
1
100
R14

PDX design files

The KiCad project lives in the kholia/Easy-Transceiver repository on GitHub; these links point at the commit this page was built from.

PDX: common questions

What microcontroller does the PDX use?

The PDX is built around the Pico, from the RP2040/RP2350 family.

How big is the PDX PCB?

The PDX measures 97.1 × 97 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PDX?

86 components, from 56 distinct parts. The full bill of materials is listed on this page.

Where can I download the PDX design files?

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

Can I use the PDX design in my own project?

The repository has no license, so all rights stay with kholia. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the PDX without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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