HardLabs

GPSDO

pwengel·DIY-GPSDO·GPSDO/GPSDO.kicad_pcb

GPSDO PCB layout, top view — open source RP2040/RP2350 board by pwengel

About the GPSDO PCB

GPSDO is an open source RP2040/RP2350 PCB design by pwengel, published on GitHub. It is a 2-layer board measuring 97.4 × 75.4 mm, with 115 components from 47 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the 74HC14, LM7805_TO220, DAC8571IDGK, AD8620 and 74LVC2G86. By type, the board carries 47 resistors, 29 capacitors, 14 ICs, 10 inductors, 8 relays and 2 jumpers.

From the project

Paste the contents (2 files) of the symbols folder into [for me, this is Dokumente]/KiCad/8.0/symbols/ Symbols for the Pico: https://github.com/ncarandini/KiCad-RP-Pico

Main components on the GPSDO

74HC14LM7805_TO220DAC8571IDGKPicoAD862074LVC2G86LM4040DBZ-4.1U1CAT24C128PIC12F675-xP

GPSDO bill of materials (BOM)

115 components, 47 distinct parts.

QtyPartRefs
1
~
IC1
1
~
IC2
3
74HC14
IC7, U7, U10
1
LM7805_TO220
U1
1
DAC8571IDGK
U2
1
Pico
U3
1
AD8620
U4
1
74LVC2G86
U5
1
LM4040DBZ-4.1
U6
1
U1
U8
1
CAT24C128
U9
1
PIC12F675-xP
U11
1
Jumper_2_Open
JP1
1
Conn_02x03_Odd_Even
JP2
1
Conn_01x04
K1
1
Conn_01x02
K3
5
Conn_Coaxial
K4, K6, K8, K9, K10
1
Conn_01x02
K7
1
~
OCXO2
1
2k
RV1
Show 27 more
QtyPartRefs
1
4k
RV2
1
SS24
D1
1
D
D2
2
100µ
L1, L5
7
10µ
L2, L4, L6, L7, L8, L9, L10
1
10µ
L3
16
100n
C1, C4, C8, C13, C14, C15, C19, C20 +8
4
47µ
C2, C7, C17, C21
2
1µ
C3, C11
2
470µ
C5, C18
1
2.2n
C6
1
22µ
C9
1
220µ
C10
2
40p
C12, C16
5
22k
R1, R4, R10, R22, R23
19
240
R2, R15, R18, R19, R21, R24, R25, R26 +11
2
100k
R3, R7
2
1k
R5, R20
1
22
R6
1
0
R8
1
160k
R9
1
1M
R11
7
10k
R12, R13, R14, R17, R35, R36, R37
2
680
R16, R29
2
4.7k
R38, R39
2
27k
R44, R47
2
47k
R45, R46

GPSDO design files

The KiCad project lives in the pwengel/DIY-GPSDO repository on GitHub; these links point at the commit this page was built from.

GPSDO: common questions

What microcontroller does the GPSDO use?

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

How big is the GPSDO PCB?

The GPSDO measures 97.4 × 75.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the GPSDO?

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

Where can I download the GPSDO design files?

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

Can I use the GPSDO design in my own project?

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

Can I test firmware for the GPSDO 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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