# General Purpose Alarm Device ## Description This General-Purpose- Alarm-Device repository defines a 'General Purpose Alarm Device' aka, GPAD module. This module has an enclosure and inside is an embedded microcontroller system. #internetOfThings #smartHomeDevices ## Project Details - **Owner:** jecstronic - **Created:** 8/12/2022 - **Last Updated:** 3/17/2026 - **Visibility:** Public - **Stars:** 4 - **Forks:** 1 ## Key Components ### A101 — [Arduino-UNO-R3](https://www.flux.ai/jecstronic/arduino-uno-r3~kf3.md) - Manufacturer Name: Arduino - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Arduino%20PDFs/A000066_Web.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Package or Case Code: Module - Part Type: Development Board - Manufacturer Part Number: Arduino-UNO-R3 **Pins:** - +3V3 [pin 4] - +5V [pin 5] - AREF [pin 30] - D0/RX [pin 15] - D1/TX [pin 16] - D10 [pin 25] - D11 [pin 26] - D12 [pin 27] - D13 [pin 28] - D14/A0 [pin 9] - D15/A1 [pin 10] - D16/A2 [pin 11] - D17/A3 [pin 12] - D18/A4 [pin 13] - D18/SDA [pin 31] - D19/A5 [pin 14] - D19/SCL [pin 32] - D2 [pin 17] - D3 [pin 18] - D4 [pin 19] - D5 [pin 20] - D6 [pin 21] - D7 [pin 22] - D8 [pin 23] - D9 [pin 24] - GND [pin 6] - GND [pin 29] - GND [pin 7] - IOREF [pin 2] - NC [pin 1] - RESET [pin 3] - VIN [pin 8] ### BZ1 — [Buzzer_12.2mm_H6.5mm](https://www.flux.ai/jecstronic/buzzer122mmh65mm~10f.md) - Part Type: Buzzer **Pins:** - - - + ### CP1 — [CP Electrolytic 5.0mm x 5.4mm](https://www.flux.ai/jharwinbarrozo/cp-electrolytic-50mm-x-54mm~x7w.md) - Part Type: Polarized Capacitor - Capacitance: 47uF **Pins:** - P1 - P2 ### CP2 — [CP Electrolytic 5.0mm x 5.4mm](https://www.flux.ai/jharwinbarrozo/cp-electrolytic-50mm-x-54mm~x7w.md) - Part Type: Polarized Capacitor - Capacitance: 47uF **Pins:** - P1 - P2 ### CP3 — [CP Electrolytic 5.0mm x 5.4mm](https://www.flux.ai/jharwinbarrozo/cp-electrolytic-50mm-x-54mm~x7w.md) - Capacitance: 47uF - Part Type: Polarized Capacitor **Pins:** - P1 - P2 ### CP4 — [CP Electrolytic 5.0mm x 5.4mm](https://www.flux.ai/jharwinbarrozo/cp-electrolytic-50mm-x-54mm~x7w.md) - Part Type: Polarized Capacitor - Capacitance: 47uF **Pins:** - P1 - P2 ### CP5 — [CP Electrolytic 5.0mm x 5.4mm](https://www.flux.ai/jharwinbarrozo/cp-electrolytic-50mm-x-54mm~x7w.md) - Capacitance: 47uF - Part Type: Polarized Capacitor **Pins:** - P1 - P2 ### CP6 — [CP Electrolytic 5.0mm x 5.4mm](https://www.flux.ai/jharwinbarrozo/cp-electrolytic-50mm-x-54mm~x7w.md) - Capacitance: 47uF - Part Type: Polarized Capacitor **Pins:** - P1 - P2 ### CP7 — [CP Electrolytic 5.0mm x 5.4mm](https://www.flux.ai/jharwinbarrozo/cp-electrolytic-50mm-x-54mm~x7w.md) - Capacitance: 47uF - Part Type: Polarized Capacitor **Pins:** - P1 - P2 ### D1 — [B220Q-13-F](https://www.flux.ai/jecstronic/b220q-13-f~ph0.md) - Manufacturer Part Number: B220Q-13-F - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.diodes.com/assets/Datasheets/B220AQ-Q-B260AQ-Q.pdf - Manufacturer Name: Diodes Incorporated **Pins:** - A [pin 2] - K [pin 1] ### D2 — [B220Q-13-F](https://www.flux.ai/jecstronic/b220q-13-f~ph0.md) - Part Type: Diode - Manufacturer Part Number: B220Q-13-F - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.diodes.com/assets/Datasheets/B220AQ-Q-B260AQ-Q.pdf - Manufacturer Name: Diodes Incorporated **Pins:** - A [pin 2] - K [pin 1] ### D3 — [B220Q-13-F](https://www.flux.ai/jecstronic/b220q-13-f~ph0.md) - Part Type: Diode - Manufacturer Part Number: B220Q-13-F - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.diodes.com/assets/Datasheets/B220AQ-Q-B260AQ-Q.pdf - Manufacturer Name: Diodes Incorporated **Pins:** - A [pin 2] - K [pin 1] ### F1 — [SF-0603S050-2](https://www.flux.ai/jecstronic/sf-0603s050-2~fhw.md) - Manufacturer Part Number: SF-0603S050-2 - Manufacturer Name: Bourns Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Fuse - Datasheet URL: https://www.bourns.com/docs/product-datasheets/sf0603s.pdf **Pins:** - P1 [pin 1] - P2 [pin 2] ### F2 — [SF-0603S050-2](https://www.flux.ai/jecstronic/sf-0603s050-2~fhw.md) - Part Type: Fuse - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.bourns.com/docs/product-datasheets/sf0603s.pdf - Manufacturer Part Number: SF-0603S050-2 - Manufacturer Name: Bourns Inc. **Pins:** - P1 [pin 1] - P2 [pin 2] ### J1 — [54601-906WPLF](https://www.flux.ai/vasy_skral/54601-906wplf~ag7.md) - Manufacturer Part Number: 54601-906WPLF - Manufacturer Name: Amphenol ICC (FCI) - Datasheet URL: https://www.amphenol-icc.com/media/wysiwyg/files/drawing/c-bmj-0082.pdf - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] ### J1 — [Pin Header 01x02 2.54mm Vertical](https://www.flux.ai/jharwinbarrozo/pin-header-01x02-254mm-vertical~4uy.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - P1 [pin 1] - P2 [pin 2] ### J105 — [S04B-XASK-1(LF)(SN)](https://www.flux.ai/jecstronic/s04b-xask-1lfsn~9n.md) - Part Type: Connector - Manufacturer Name: JST Sales America Inc. - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXA1.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: S04B-XASK-1(LF)(SN) **Pins:** - P1 [pin 4] - P2 [pin 3] - P3 [pin 2] - P4 [pin 1] ### J2 — [Pin Header 01x02 2.54mm Vertical](https://www.flux.ai/jharwinbarrozo/pin-header-01x02-254mm-vertical~4uy.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### J2 — [Barrel_Jack_Switch_SMT_FC681465S](https://www.flux.ai/jecstronic/barreljackswitchsmtfc681465s~gu.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.cliffuk.co.uk/products/dcconnectors/DualDCSockets.pdf - Part Type: Connector - Manufacturer Name: CLIFF Electronic Components Ltd - Manufacturer Part Number: FC681465S **Pins:** - 1 [pin 4] - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J501 — [USB_B_Micro_horizontal](https://www.flux.ai/jecstronic/usbbmicrohorizontal~7xd.md) - Manufacturer Part Number: USB_B_Micro **Pins:** - D- - D+ - GND - ID - Shield - VBUS ### J601 — [Molex connector Vertical](https://www.flux.ai/jecstronic/molex-connector-vertical~uz.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] ### LED1 — [LED THT D5.0mm](https://www.flux.ai/jharwinbarrozo/led-tht-d5p0mm~dw.md) - Forward Voltage: 1.7V - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### LED2 — [LED THT D5.0mm](https://www.flux.ai/jharwinbarrozo/led-tht-d5p0mm~dw.md) - Part Type: LED - Forward Voltage: 1.7V **Pins:** - A [pin 2] - K [pin 1] ### LED3 — [LED THT D5.0mm](https://www.flux.ai/jharwinbarrozo/led-tht-d5p0mm~dw.md) - Forward Voltage: 1.7V - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### LED4 — [LED THT D5.0mm](https://www.flux.ai/jharwinbarrozo/led-tht-d5p0mm~dw.md) - Forward Voltage: 1.7V - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### LED5 — [LED THT D5.0mm](https://www.flux.ai/jharwinbarrozo/led-tht-d5p0mm~dw.md) - Forward Voltage: 1.7V - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### LED6 — [LED THT D5.0mm](https://www.flux.ai/jharwinbarrozo/led-tht-d5p0mm~dw.md) - Part Type: LED - Forward Voltage: 1.7V **Pins:** - A [pin 2] - K [pin 1] ### LED7 — [LED 0805 (2012 Metric)](https://www.flux.ai/jharwinbarrozo/led-0805-2012-metric~ph.md) - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### LED8 — [LED 0603 (1608 Metric)](https://www.flux.ai/jharwinbarrozo/led-0603-1608-metric~yk.md) - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### Q1 — [MMBT2222A](https://www.flux.ai/jecstronic/mmbt2222a~vwv.md) - Manufacturer Name: onsemi - Part Type: Transistor - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/NextGen%20Components%20PDFs/MMBT2222A.pdf - Manufacturer Part Number: MMBT2222A - Beta / hFe: 100 - Leakage Current: 1e-13A - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q2 — [MMBT2222A](https://www.flux.ai/jecstronic/mmbt2222a~vwv.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/NextGen%20Components%20PDFs/MMBT2222A.pdf - Beta / hFe: 100 - Manufacturer Part Number: MMBT2222A - Leakage Current: 1e-13A - Manufacturer Name: onsemi - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q3 — BSS138 - Manufacturer Name: onsemi - Manufacturer Part Number: BSS138 - Part Type: Transistor - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf **Pins:** - D - G - S ### Q3 — [MMBT2222A](https://www.flux.ai/jecstronic/mmbt2222a~vwv.md) - Manufacturer Part Number: MMBT2222A - Leakage Current: 1e-13A - Beta / hFe: 100 - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/NextGen%20Components%20PDFs/MMBT2222A.pdf - Part Type: Transistor - Manufacturer Name: onsemi - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q4 — [MMBT2222A](https://www.flux.ai/jecstronic/mmbt2222a~vwv.md) - Part Type: Transistor - Manufacturer Name: onsemi - Leakage Current: 1e-13A - Beta / hFe: 100 - Manufacturer Part Number: MMBT2222A - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/NextGen%20Components%20PDFs/MMBT2222A.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q5 — [MMBT2222A](https://www.flux.ai/jecstronic/mmbt2222a~vwv.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/NextGen%20Components%20PDFs/MMBT2222A.pdf - Leakage Current: 1e-13A - Manufacturer Part Number: MMBT2222A - Beta / hFe: 100 - Manufacturer Name: onsemi - Part Type: Transistor **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q6 — [MMBT2222A](https://www.flux.ai/jecstronic/mmbt2222a~vwv.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/NextGen%20Components%20PDFs/MMBT2222A.pdf - Leakage Current: 1e-13A - Manufacturer Part Number: MMBT2222A - Beta / hFe: 100 - Manufacturer Name: onsemi - Part Type: Transistor **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] ### Q7 — [MMBT2907ALT1G](https://www.flux.ai/jecstronic/mmbt2907alt1g~i1m.md) - Part Type: Transistor - Manufacturer Part Number: MMBT2907ALT1G - Manufacturer Name: onsemi - Datasheet URL: https://www.mouser.com/datasheet/2/308/MMBT2907ALT1_D-1811514.pdf **Pins:** - B - C - E ### RV301 — [Potentiometer_THT 3386P_Vertical](https://www.flux.ai/jecstronic/potentiometertht-3386pvertical~2ol.md) - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/3386.pdf - Part Type: Potentiometer - Manufacturer Name: Bourns Inc. - Resistance: 10kΩ - Manufacturer Part Number: 3386P-1-103LF - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### S1 — [1825910-7](https://www.flux.ai/jecstronic/1825910-7~mv6.md) - Part Type: Switch - Manufacturer Name: TE Connectivity ALCOSWITCH Switches - Manufacturer Part Number: 1825910-7 - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=1825910&DocType=Customer+Drawing&DocLang=English - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### S601 — [B3F-4055](https://www.flux.ai/jecstronic/b3f-4055~y5p.md) - Datasheet URL: https://www.snapeda.com/parts/B3F-4055/Omron%20Electronics/datasheet/ - Manufacturer Part Number: B3F-4055 - Part Type: Switch - Manufacturer Name: OMRON - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### U1 — [ATMEGA328-AU](https://www.flux.ai/adrian95/atmega328-au~nmw.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega48A-PA-88A-PA-168A-PA-328-P-DS-DS40002061B.pdf - Manufacturer Part Number: ATMEGA328-AU - Manufacturer Name: Microchip - Part Type: Microcontroller **Pins:** - ~RESET~/PC6 [pin 29] - ADC6 [pin 19] - ADC7 [pin 22] - AREF [pin 20] - AVCC [pin 18] - GND [pin 3] - GND [pin 21] - GND [pin 5] - PB0 [pin 12] - PB1 [pin 13] - PB2 [pin 14] - PB3 [pin 15] - PB4 [pin 16] - PB5 [pin 17] - PC0 [pin 23] - PC1 [pin 24] - PC2 [pin 25] - PC3 [pin 26] - PC4 [pin 27] - PC5 [pin 28] - PD0 [pin 30] - PD1 [pin 31] - PD2 [pin 32] - PD3 [pin 1] - PD4 [pin 2] - PD5 [pin 9] - PD6 [pin 10] - PD7 [pin 11] - VCC [pin 4] - VCC [pin 6] - XTAL1/PB6 [pin 7] - XTAL2/PB7 [pin 8] ### U301 — [PCF8574DWR](https://www.flux.ai/jecstronic/pcf8574dwr~mlh.md) - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - Datasheet URL: https://rocelec.widen.net/view/pdf/zsmwgcsqj9/scps068j.pdf?t.download=true&u=5oefqw - Manufacturer Part Number: PCF8574DWR - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ~INT~ [pin 13] - A0 [pin 1] - A1 [pin 2] - A2 [pin 3] - P0 [pin 4] - P1 [pin 5] - P2 [pin 6] - P3 [pin 7] - P4 [pin 9] - P5 [pin 10] - P6 [pin 11] - P7 [pin 12] - SCL [pin 14] - SDA [pin 15] - VDD [pin 16] - VSS [pin 8] ### U302 — [HD4470-LCD](https://www.flux.ai/jecstronic/hd4470-lcd~dpz.md) - Manufacturer Part Number: HD4470-LCD **Pins:** - D0 - D1 - D2 - D3 - D4 - D5 - D6 - D7 - EN - LED(-) - LED(+) - R/W - RS - VDD - VEE - VSS ### U4 — [LM7805CT](https://www.flux.ai/jecstronic/lm7805ct~2z.md) - Manufacturer Name: Fairchild Semiconductor - Part Type: Integrated Circuit - Datasheet URL: https://rocelec.widen.net/view/pdf/hl53fsrf43/FAIR-S-A0000088116-1.pdf?t.download=true&u=5oefqw - Manufacturer Part Number: LM7805CT **Pins:** - GND - VI - VO ### U501 — [CH340E](https://www.flux.ai/vasyl/ch340e~qrx.md) - Part Type: Integrated Circuit - Manufacturer Name: Wah - Datasheet URL: https://www.mpja.com/download/35227cpdata.pdf - Manufacturer Part Number: CH340E **Pins:** - ~CTS - ~RTS - GND - RXD - TNOW - TXD - UD- - UD+ - V3 - VCC ### Y1 — [Crystal SMD_HC49-SD](https://www.flux.ai/jecstronic/crystal-smdhc49-sd~fa.md) - Part Type: Oscillator **Pins:** - P1 - P2 *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/jecstronic/general-purpose-alarm-device~wcm](https://www.flux.ai/jecstronic/general-purpose-alarm-device~wcm).* --- *Generated from [https://www.flux.ai/jecstronic/general-purpose-alarm-device~wcm](https://www.flux.ai/jecstronic/general-purpose-alarm-device~wcm)*