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4 layers70 × 97 mmStopwatchy, the printed circuit board in 3D
Size
70 × 97 mm
Copper layers
4
Thickness
1.6 mm
Parts
82
Nets
88
Pads
357
Tracks, vias
1,160, 122
Pours
8
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
6 Jul 2025
Updated
6 Jul 2025

Overview

Stopwatchy is an open-source printed circuit board by JEAPI-DEV, from the JEAPI-DEV/Project_Penta repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 70 × 97 mm with 82 parts on 88 nets, routed with 1,160 tracks and 122 vias.

It is built around the W25Q128JVSIQ, TF-01A and NHD-2.4-240320CF-BSXV-F, with the RT9080-33GJ5, PMEG2020EH and ABM8-272-T3 among its other parts. Its parts include 32 resistors, 22 capacitors, 5 ICs, 4 switches and 3 connectors. It belongs with the RP2350 boards of this library.

Main components

8

README

README.md

Schematic and PCB Layers

Here As Image Previews.

Schematic

Schematic

PCB Front

PCB Front

PCB Inner Layer 1

PCB Inner Layer 1

PCB Inner Layer 2

PCB Inner Layer 2

PCB Back

PCB Back

Parts

82
QtyValueFootprintReferences
11100nCapacitor_SMD:C_0402_1005MetricC1, C2, C3, C4, C5, C6, C7, C8, C10, C16, C18
510kResistor_SMD:R_0603_1608MetricR9, R12, R13, R15, R16
40PCM_4ms_Resistor:R_0805_2012MetricR17, R18, R19, R32
410uF_0603_10VPCM_4ms_Capacitor:C_0603C17, C19, C20, C21
422Resistor_SMD:R_0603_1608MetricR14, R28, R29, R30
44.7uCapacitor_SMD:C_0402_1005MetricC9, C11, C12, C13
310k_0402Resistor_SMD:R_0402_1005MetricR25, R27, R31
31kResistor_SMD:R_0402_1005MetricR6, R7, R8
35.1kResistor_SMD:R_0603_1608MetricR2, R3, R10
20Resistor_SMD:R_0402_1005MetricR21, R23
210kResistor_SMD:R_0402_1005MetricR20, R22
215pCapacitor_SMD:C_0402_1005MetricC14, C15
227Resistor_SMD:R_0402_1005MetricR1, R4
2PMEG2020EHDiode_SMD:D_SOD-123FD1, D3
1220R_0603PCM_4ms_Resistor:R_0603R24
12k_0603PCM_4ms_Resistor:R_0603R26
13.3uInductor_SMD:L_0603_1608MetricL1
133Resistor_SMD:R_0402_1005MetricR5
1ABM8-272-T3Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mmY1
1APS6404L-3SQR-SNAPS6404L-3SQR-SN:APS6404L-3SQR-SN_APYPSRAM
1BOOTcommon:SHOU HAN TS24CABOOT
1BTN_1Button_Switch_THT:SW_PUSH_6mmSW5
1BTN_2Button_Switch_THT:SW_PUSH_6mmSW6
1BTN_3Button_Switch_THT:SW_PUSH_6mmSW4
1BTN_4Button_Switch_THT:SW_PUSH_6mmSW7
1Buzzer_5Vcommon:Speaker_MLT-8530BZ1
1C_1806PCM_Capacitor_SMD_AKL:C_1806_4516MetricC22
1DMG3415UPCM_4ms_Package_SOT:SOT-23Q1
1MCP73831-2-MCPackage_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.7x1.4mmU7
1NHD-2.4-240320CF-BSXV-Fstopwatchy_library:NHD-2.4-240320CF-BSXV-FU3
1PINHD_1x4_FemaleConnector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_HorizontalJ2
1PROGConnector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_VerticalJ4
1RESETcommon:SHOU HAN TS24CARST
1RP2350A-QFN60RP2350_KiCad-main:RP2350A_QFN-60_EP_7.75x7.75_Pitch0.4mmU4
1RT9080-33GJ5RT9080-33GJ5:TSOT-23-5_RITU6
1Red_100mcd_0603LED_SMD:LED_0603_1608MetricCH
1TF-01ATF-01A:TF-01AMICRO_SD1
1USB_C_Receptacle_USB2.0_16PConnector_USB:USB_C_Receptacle_G-Switch_GT-USB-7010ASVJ1
1VolumePCM_SL_Devices:potentiometer_3362PR11
1W25Q128JVSPackage_SO:SOIC-8_5.23x5.23mm_P1.27mmU1
1~common:joystick-ytlyv13sytlyv13s-joystick1

The 78 most common of 82 parts.

Questions

How big is the Stopwatchy PCB?

It measures 70 × 97 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Stopwatchy use?

82 parts, built around the W25Q128JVSIQ, TF-01A, NHD-2.4-240320CF-BSXV-F and RT9080-33GJ5. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Stopwatchy KiCad files?

From the JEAPI-DEV/Project_Penta repository on GitHub, at the commit this page was made from: the board is stopwatchy.kicad_pcb and its schematic stopwatchy.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Stopwatchy design in my own project?

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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