HardLabs

Lap Timer: Timer Board

Dominik-Workshop·lap-timer·pcb/timer-board/timer-board.kicad_pcb

Lap Timer: Timer Board layout, top view — open source STM32 board by Dominik-Workshop

About the Lap Timer: Timer Board

Lap Timer: Timer Board is an open source STM32 PCB design by Dominik-Workshop, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 50 × 40 mm, with 47 components from 21 distinct parts.

Its main chip is the STM32F411RET6, from the STM32 family. Other key parts include the TSSP58038 and AMS1117-3.3. By type, the board carries 18 capacitors, 12 resistors, 6 diodes, 4 switches, 3 ICs and 2 connectors.

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

From the project

Lap timer, EKA 2 sem PWR

Compact and portable lap timer, capable of measuring time on:

- Closed-loop tracks (1-gate mode) - Start/finish tracks (2-gate mode)

Infrared light barriers are used as optical triggers to detect when an object crosses the start or finish line.

- High accuracy using STM32 hardware timers - OLED display for showing lap times - Two operating modes: 1-gate or 2-gate - Modulated IR system (38 kHz) for ambient light immunity

Lap Timer: Timer Board, from the project README
From the project README

Main components on the Lap Timer: Timer Board

STM32F411RET6TSSP58038AMS1117-3.3

Lap Timer: Timer Board bill of materials (BOM)

47 components, 21 distinct parts.

QtyPartRefs
1
STM32F411RET6
ST
U1
1
TSSP58038
U2
1
AMS1117-3.3
U3
1
X322512MSB4SI
Yangxing Technology
Y1
1
USB-310-B-SU
USB-C_USB-310F-B-SU
HOOYA
J1
1
PJ-342
Jack_PJ-342
SHOU HAN
J2
1
N096-2864KSWEG01-H30
-
DISP1
4
KMR211NGLFS
SW_KMR211NGLFS
C&K
SW1, SW2, SW3, SW4
1
PESD5Z5.0-N
PESD5Z5
BORN
D1
1
TPD2E2U06DCKR
Texas Instruments
D2
3
KT-0603R
LED-R-0603_KT-0603R
Hubei KENTO Elec
D3, D4, D5
1
1N4148WS-AU_R1_000A1
1N4148WS-AU
PANJIT
D6
7
CL05B104KB54PNC
C-100n-0402
Samsung Electro-Mechanics
C1, C4, C9, C11, C12, C13, C14
5
CL05A475MP5NRNC
C-4u7-0402
Samsung Electro-Mechanics
C2, C3, C7, C15, C16
2
0402CG330J500NT
C-33p-0402
FH
C5, C18
3
CL05A105KA5NQNC
C-1u-0402
Samsung Electro-Mechanics
C6, C8, C17
1
CL05A225MQ5NSNC
C-2u2-0402
Samsung Electro-Mechanics
C10
1
0402WGF3300TCE
R-330r-0402
UNI-ROYAL(Uniroyal Elec)
R1
7
0402WGF5101TCE
R-5k1-0402
UNI-ROYAL(Uniroyal Elec)
R2, R3, R5, R9, R10, R11, R12
3
0402WGF1001TCE
R-1k-0402
UNI-ROYAL(Uniroyal Elec)
R4, R7, R8
Show 1 more
QtyPartRefs
1
0402WGF3903TCE
R-390k-0402
UNI-ROYAL(Uniroyal Elec)
R6

Lap Timer: Timer Board design files

The KiCad project lives in the Dominik-Workshop/lap-timer repository on GitHub; these links point at the commit this page was built from.

Lap Timer: Timer Board: common questions

What microcontroller does the Lap Timer: Timer Board use?

The Lap Timer: Timer Board is built around the STM32F411RET6, from the STM32 family.

How big is the Lap Timer: Timer Board?

The Lap Timer: Timer Board measures 50 × 40 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Lap Timer: Timer Board?

47 components, from 21 distinct parts. The full bill of materials is listed on this page.

Where can I download the Lap Timer: Timer Board design files?

From the Dominik-Workshop/lap-timer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Lap Timer: Timer Board design in my own project?

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

Can I test firmware for the Lap Timer: Timer Board without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

More boards in lap-timer

Similar boards