# DYI Stopwatch clock (Arduino nano) ## Description Project featuring stopwatch based on Arduino nano and DYI 7 segment clock with max7219 and ULN2803A transistor array. For comunication project uses nRF24L01. #Arduino #Nano #Shield #project #nRF24 #max7219 #ULN2803A #Stopwatch #Firefighting_sport ## Project Details - **Owner:** soudruhromancz - **Created:** 1/14/2025 - **Last Updated:** 2/19/2025 - **Visibility:** Public ## Key Components ### Digit0 — [Pin Header 01x09 2.54mm Horizontal](https://www.flux.ai/adrian95/pin-header-01x09-254mm-horizontal~de3.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### J1 — [2-Position Screw Terminal](https://www.flux.ai/corynrobinson/2-position-screw-terminal~s4.md) - Manufacturer Name: Würth Elektrik - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Manufacturer Part Number: 691137710002 - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### J2 — [282836-3](https://www.flux.ai/jecstronic/282836-3~fct.md) - Manufacturer Name: TE Connectivity AMP Connectors - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=1308389_EUROSTYLE_TERMINAL_BLOCKS&DocType=CS&DocLang=English - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Part Number: 282836-3 **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] - PIN3 [pin 3] ### J3 — [2-Position Screw Terminal](https://www.flux.ai/corynrobinson/2-position-screw-terminal~s4.md) - Manufacturer Name: Würth Elektrik - Datasheet URL: https://www.we-online.com/katalog/datasheet/691137710002.pdf - Manufacturer Part Number: 691137710002 - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### J4 — [TB002-500-03BE](https://www.flux.ai/adrian95/tb002-500-03be~gk6.md) - Part Type: Connector - Manufacturer Part Number: TB002-500-03BE - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.cuidevices.com/product/resource/tb002-500.pdf - Manufacturer Name: CUI Devices **Pins:** - PIN1 [pin 1] - PIN2 [pin 2] - PIN3 [pin 3] ### Q1 — [BC327](https://www.flux.ai/vasy_skral/bc327~10e.md) - Manufacturer Part Number: BC32725TA **Pins:** - B - C - E ### Q2 — [BC327](https://www.flux.ai/vasy_skral/bc327~10e.md) - Manufacturer Part Number: BC32725TA **Pins:** - B - C - E ### Q3 — [BC327](https://www.flux.ai/vasy_skral/bc327~10e.md) - Manufacturer Part Number: BC32725TA **Pins:** - B - C - E ### Q4 — [BC327](https://www.flux.ai/vasy_skral/bc327~10e.md) - Manufacturer Part Number: BC32725TA **Pins:** - B - C - E ### Q5 — [BC327](https://www.flux.ai/vasy_skral/bc327~10e.md) - Manufacturer Part Number: BC32725TA **Pins:** - B - C - E ### Q6 — [BC327](https://www.flux.ai/vasy_skral/bc327~10e.md) - Manufacturer Part Number: BC32725TA **Pins:** - B - C - E ### Q7 — [BC327](https://www.flux.ai/vasy_skral/bc327~10e.md) - Manufacturer Part Number: BC32725TA **Pins:** - B - C - E ### Q8 — [BC327](https://www.flux.ai/vasy_skral/bc327~10e.md) - Manufacturer Part Number: BC32725TA **Pins:** - B - C - E ### U1 — [MAX7219EWG+](https://www.flux.ai/jharwinbarrozo/max7219ewgplus~kjc.md) - Part Type: Integrated Circuit - Datasheet URL: https://datasheets.maximintegrated.com/en/ds/MAX7219-MAX7221.pdf - Manufacturer Name: Maxim Integrated - Manufacturer Part Number: MAX7219EWG+ **Pins:** - 1 / DIN - 10 / DIG_5 - 11 / DIG_1 - 12 / LOAD - 13 / CLK - 14 / SEG_A - 15 / SEG_F - 16 / SEG_B - 17 / SEG_G - 18 / ISET - 19 / V+ - 2 / DIG_0 - 20 / SEG_C - 21 / SEG_E - 22 / SEG_DP - 23 / SEG_D - 24 / DOUT - 3 / DIG_4 - 4 / GND - 5 / DIG_6 - 6 / DIG_2 - 7 / DIG_3 - 8 / DIG_7 - 9 / GND__1 ### U2 — [ULN2803A](https://www.flux.ai/adrian95/uln2803a~6vl.md) - Manufacturer Part Number: ULN2803A - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.mouser.com/datasheet/2/389/uln2801a-1852595.pdf - Manufacturer Name: STMicroelectronics - Part Type: Transistor **Pins:** - COMMON_FREE__WHEELING_DIODES [pin 10] - GND [pin 9] - IN_1 [pin 1] - IN_2 [pin 2] - IN_3 [pin 3] - IN_4 [pin 4] - IN_5 [pin 5] - IN_6 [pin 6] - IN_7 [pin 7] - IN_8 [pin 8] - OUT_1 [pin 18] - OUT_2 [pin 17] - OUT_3 [pin 16] - OUT_4 [pin 15] - OUT_5 [pin 14] - OUT_6 [pin 13] - OUT_7 [pin 12] - OUT_8 [pin 11] ### U4 — [MFR50SDRD52-9K53](https://www.flux.ai/lcsc/mfr50sdrd52-9k53~pn2o.md) - Manufacturer Part Number: MFR50SDRD52-9K53 - LCSC Part Number: C1752638 - Package or Case Code: RES-TH_BD2.4-L6.3-P10.30-D0.6 - Manufacturer Name: YAGEO(国巨) - JLCPCB Part Class: Extended Part **Pins:** - 1 [pin 1] - 2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/soudruhromancz/dyi-stopwatch-clock-arduino-nano~o2](https://www.flux.ai/soudruhromancz/dyi-stopwatch-clock-arduino-nano~o2).* --- *Generated from [https://www.flux.ai/soudruhromancz/dyi-stopwatch-clock-arduino-nano~o2](https://www.flux.ai/soudruhromancz/dyi-stopwatch-clock-arduino-nano~o2)*