HardLabs

EA5IOT GPSDO

EA5IOT·EA5IOT_GPSDO·Test PCB/GPSDO-LCD-2/GPSDO-LCD-2.kicad_pcb

EA5IOT GPSDO PCB layout, top view — open source AVR/Arduino board by EA5IOT

About the EA5IOT GPSDO PCB

EA5IOT GPSDO is an open source AVR/Arduino PCB design by EA5IOT, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 130.8 × 53.6 mm, with 93 components from 37 distinct parts.

Its main chip is the Arduino_STM32F103C8T6_2, from the AVR/Arduino family. Other key parts include the OPA692, LM1084-ADJ, LMP7731, LCD 16x2 and NEO-6M. By type, the board carries 39 capacitors, 32 resistors, 10 ICs, 5 connectors, 3 switches and 3 inductors.

It belongs with the displays & leds designs in this gallery.

From the project

GPSDO

EA5IOT GPSDO, from the project README
From the project README

Main components on the EA5IOT GPSDO

OPA692LM1084-ADJArduino_STM32F103C8T6_2LMP7731LCD 16x2NEO-6MOCXO-CTI_OSC5ASTP2145AJack_DC

EA5IOT GPSDO bill of materials (BOM)

93 components, 37 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
OPA692
U1
2
LM1084-ADJ
U2, U5
1
Arduino_STM32F103C8T6_2
U3
1
LMP7731
U4
1
LCD 16x2
U6
1
NEO-6M
U7
1
OCXO-CTI_OSC5A
U8
1
STP2145A
U9
1
Jack_DC
U10
4
Conn_Coaxial
J1, J2, J3, J4
1
Conn_02x02_Counter_Clockwise
J5
3
SW_Push
SW1, SW2, SW3
1
MURS480ET3G
D1
2
100uH 290mA
L1, L3
1
100uH 4A
L2
15
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +7
6
10uF Tantalo
C9, C15, C21, C32, C36, C37
5
1nF
C11, C12, C13, C38, C39
7
100pF
C14, C23, C26, C28, C29, C31, C35
1
2200uF LOW ESR
C18
Show 17 more
QtyPartRefs
3
100uF
C19, C25, C33
2
10uF Ceramico
C20, C22
4
50 ohm
R1, R2, R3, R4
4
2K2
R5, R6, R7, R8
2
365ohm 1%
R9, R22
4
10K
R10, R15, R20, R30
2
121ohm 1%
R11, R25
1
560ohm
R12
1
100K
R13
1
169K
R14
1
1M
R16
2
1K
R17, R24
4
470
R18, R19, R21, R29
1
1K04 1%
R23
3
Opcional
R26, R27, R32
1
3K9
R28
1
1K56
R31

EA5IOT GPSDO design files

The KiCad project lives in the EA5IOT/EA5IOT_GPSDO repository on GitHub; these links point at the commit this page was built from.

EA5IOT GPSDO: common questions

What microcontroller does the EA5IOT GPSDO use?

The EA5IOT GPSDO is built around the Arduino_STM32F103C8T6_2, from the AVR/Arduino family.

How big is the EA5IOT GPSDO PCB?

The EA5IOT GPSDO measures 130.8 × 53.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the EA5IOT GPSDO?

93 components, from 37 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 EA5IOT GPSDO design files?

From the EA5IOT/EA5IOT_GPSDO repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the EA5IOT GPSDO design in my own project?

Yes, under the terms of its GPL-3.0 license, which EA5IOT chose for the repository.

Can I test firmware for the EA5IOT GPSDO without the hardware?

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

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