HardLabs

Segment Display Board

FRC-1721·AccidentCounter·Hardware/Segment_Display_Board/Segment_Display_Board.kicad_pcb

Segment Display Board layout, top view — open source AVR/Arduino board by FRC-1721

About the Segment Display Board

Segment Display Board is an open source AVR/Arduino PCB design by FRC-1721, published on GitHub. It is a 2-layer board measuring 58.4 × 141 mm, with 90 components from 38 distinct parts.

Its main chip is the ATmega328P-A, from the AVR/Arduino family. Other key parts include the DS1307Z+, FT232RL, NCV1117ST50T3G, 5inSegment and SN74HC595. By type, the board carries 35 resistors, 14 transistors, 13 capacitors, 7 connectors, 6 ICs and 4 jumpers.

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

From the project

A digital sign hung in the build space advertising days without incident

This repo contains all the firmware and hardware for Tidal Force's "Days Worked Without Incident" counter.

If you're looking for the latest docs/builds, see our Releases Page.

First, clone this repo (and optionally checkout a branch)

Some libraries and resources are included as submodules, run the following command to initialize them before opening the main sch

Segment Display Board, from the project README
From the project README

Main components on the Segment Display Board

ATmega328P-ADS1307Z+FT232RLNCV1117ST50T3G5inSegmentSN74HC595

Segment Display Board bill of materials (BOM)

90 components, 38 distinct parts.

QtyPartRefs
1
ATmega328P-A
U201
1
DS1307Z+
U202
1
FT232RL
U301
1
NCV1117ST50T3G
U401
1
5inSegment
U501
1
SN74HC595
U502
7
MMBT3904
Q601, Q701, Q801, Q901, Q1001, Q1101, Q1201
7
MMBT3906
Q602, Q702, Q802, Q902, Q1002, Q1102, Q1202
1
16mHz
Y201
1
32.768kHz
Y202
1
IN
J101
1
OUT
J102
1
Tag Connect
J201
1
EXT BTN
J202
1
USB_B_Micro
J301
1
PROG
J302
1
19V Input
J401
1
3v
BT201
1
RSTBridge
JP201
1
SolderJumper_2_Open
JP301
Show 18 more
QtyPartRefs
2
SolderJumper_2_Bridged
JP501, JP502
1
RESET
SW201
1
DAY_RESET
SW202
1
DAY_ADV
SW203
1
DAY_SUB
SW204
1
STAT
D201
1
RX
D301
1
TX
D302
1
PWR
D401
9
100nF
C201, C202, C301, C302, C303, C304, C402, C403 +1
2
22pf
C203, C204
1
10uf
C401
1
1uF
C404
7
1K
R201, R202, R203, R206, R303, R304, R401
13
10K
R204, R205, R207, R208, R209, R302, R601, R701 +5
1
4K7
R301
7
2K2
R602, R702, R802, R902, R1002, R1102, R1202
7
680R
R603, R703, R803, R903, R1003, R1103, R1203

Segment Display Board design files

The KiCad project lives in the FRC-1721/AccidentCounter repository on GitHub; these links point at the commit this page was built from.

Segment Display Board: common questions

What microcontroller does the Segment Display Board use?

The Segment Display Board is built around the ATmega328P-A, from the AVR/Arduino family.

How big is the Segment Display Board?

The Segment Display Board measures 58.4 × 141 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Segment Display Board?

90 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the Segment Display Board design files?

From the FRC-1721/AccidentCounter repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Segment Display Board design in my own project?

The repository has no license, so all rights stay with FRC-1721. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Segment Display Board 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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