HardLabs

Gps seven seg clock

JWehle·gps-seven-seg-clock

Gps seven seg clock PCB layout, top view — open source ESP32 board by JWehle

About the Gps seven seg clock PCB

Gps seven seg clock is an open source ESP32 PCB design by JWehle, published on GitHub under the Apache-2.0 license. It is a 4-layer board measuring 101.6 × 101.6 mm, with 95 components from 31 distinct parts.

Its main chip is the ESP32 Dev Board, from the ESP32 family. Other key parts include the LM3488MM, ULN2003A and PCA9555PW. By type, the board carries 32 capacitors, 20 resistors, 17 test points, 11 ICs, 10 connectors and 3 transistors.

It belongs with the rf & radio designs in this gallery, and the repository also holds 1 earlier revision of it.

From the project

A large seven segment clock that uses highly accurate GPS time.

Main components on the Gps seven seg clock

LM3488MMESP32 Dev BoardULN2003APCA9555PW

Gps seven seg clock bill of materials (BOM)

95 components, 31 distinct parts.

QtyPartRefs
1
LM3488MM
U1
1
ESP32 Dev Board
U2
6
ULN2003A
U3, U4, U5, U9, U10, U11
3
PCA9555PW
U6, U7, U8
1
SiS176DN
Q1
1
2N7002
Q2
1
MMBT2222A
Q3
2
Conn_01x06
J1, J2
2
SM04B-GHS-TB
J3, J4
6
SM09B-GHS-TB
J5, J6, J7, J8, J9, J10
8
5016
TP1, TP2, TP6, TP7, TP10, TP15, TP16, TP17
8
5016
TP3, TP5, TP8, TP9, TP11, TP12, TP13, TP14
1
20AWG Wire
TP4
1
CDBB345LR-HF
D1
1
10uH
L1
13
22uF
C1, C2, C3, C4, C5, C6, C7, C8 +5
14
0.1uF
C12, C17, C18, C19, C20, C21, C25, C26 +6
1
1nF
C13
1
100pF
C14
1
10nF
C15
Show 11 more
QtyPartRefs
2
100uF
C16, C22
1
0.1
R1
2
69.8K
R2, R3
3
1K
R4, R10, R16
1
40K
R5
1
10K
R6
5
100K
R7, R11, R12, R15, R18
1
0.05
R8
3
2.2K
R9, R17, R19
2
470
R13, R14
1
0
R20

Gps seven seg clock design files

The KiCad project lives in the JWehle/gps-seven-seg-clock repository on GitHub; these links point at the commit this page was built from.

Gps seven seg clock: common questions

What microcontroller does the Gps seven seg clock use?

The Gps seven seg clock is built around the ESP32 Dev Board, from the ESP32 family.

How big is the Gps seven seg clock PCB?

The Gps seven seg clock measures 101.6 × 101.6 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Gps seven seg clock?

95 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the Gps seven seg clock design files?

From the JWehle/gps-seven-seg-clock repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Gps seven seg clock design in my own project?

Yes, under the terms of its Apache-2.0 license, which JWehle chose for the repository.

Can I test firmware for the Gps seven seg clock 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.

Earlier revisions in the repo: gps-seven-seg-clock

Similar boards