# Cat Deterrent Sprayer 2306 ## Description Motion-activated cat deterrent sprayer controller: Ø34 mm round PCB using an ATtiny85, 3.3 V PIR/logic rail, 5 V USB power-bank pump rail, MOSFET pump drive, optional keep-alive load, and compact top-side SMT layout. ## Project Details - **Owner:** chrisbrooks1982 - **Created:** 8/16/2026 - **Last Updated:** 8/16/2026 - **Visibility:** Public ## Key Components ### D1 — [MBR230LSFT1G](https://www.flux.ai/lcsc/mbr230lsft1g~hg7h.md) - Product Info Url: https://lcsc.com/product-detail/Schottky-Barrier-Diodes-SBD_ON_MBR230LSFT1G_MBR230LSFT1G_C126673.html - Manufacturer Name: onsemi(安森美) - LCSC Part Number: C126673 - Part Type: Schottky Barrier Diodes (SBD) - Package or Case Code: SOD-123FL_L2.7-W1.8-LS3.8-RD - Manufacturer Part Number: MBR230LSFT1G - Role: Flyback / Freewheeling - JLCPCB Part Class: Extended Part - Role Details: 2 A 30 V Schottky freewheel diode physically close to pump connector to clamp inductive turn-off. - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1810241808_onsemi-MBR230LSFT1G_C126673.pdf **Pins:** - A [pin 2] - C [pin 1] ### J1 — [S2B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-k-slfsn~brb.md) - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America Inc. - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### J2 — [S2B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-k-slfsn~brb.md) - Manufacturer Name: JST Sales America Inc. - Part Type: Connector - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - P1 [pin 1] - P2 [pin 2] ### J3 — [Pin Header 01x03 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x03-254mm-vertical~cp4.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### LED1 — [0603GBD0790S01](https://www.flux.ai/adrian95/0603gbd0790s01~iak.md) - Manufacturer Part Number: 0603GBD0790S01 - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/4336/0603GBD0790S01.pdf - Manufacturer Name: ORIENTAL TECHNOLOGY - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### Q1 — [AO3400A](https://www.flux.ai/adrian95/ao3400a~ug9.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO3400A_ds.pdf - Manufacturer Part Number: AO3400A - Role Details: 30 V N-MOSFET low-side switch for <=1.5 A 5 V pump bursts, driven from 3.3 V MCU through gate resistor. - Role: Switching - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Alpha & Omega Semiconductor Inc. **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### RV1 — [3314G-1-103E](https://www.flux.ai/lcsc/3314g-1-103e~hybx.md) - Manufacturer Name: BOURNS - JLCPCB Part Class: Extended Part - LCSC Part Number: C780220 - Role: Voltage Division - Part Type: Variable Resistors/Potentiometers - Package or Case Code: RES-ADJ-SMD_3314G-1-103E - Manufacturer Part Number: 3314G-1-103E - Role Details: Optional 10 k trimmer from 3.3 V to GND with wiper into ATtiny ADC PB1. **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### U1 — [ATTINY85-20SU](https://www.flux.ai/adrian95/attiny85-20su~t3s.md) - Role: Signal Generation - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-2586-AVR-8-bit-Microcontroller-ATtiny25-ATtiny45-ATtiny85_Datasheet-Summary.pdf - Role Details: ATtiny85 MCU controlling PIR input, status LED, optional keep-alive output, and pump gate drive. - Part Type: Microcontroller - Manufacturer Name: Microchip - Manufacturer Part Number: ATTINY85-20SU - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - ~RESET~/PB5 [pin 1] - AREF/PB0 [pin 5] - GND [pin 4] - PB1 [pin 6] - PB2 [pin 7] - VCC [pin 8] - XTAL1/PB3 [pin 2] - XTAL2/PB4 [pin 3] ### U2 — [MCP1700T-3302E-TT](https://www.flux.ai/adrian95/mcp1700t-3302e-tt~h60.md) - Datasheet URL: https://datasheet.octopart.com/MCP1700T-3302E/TT-Microchip-datasheet-532260.pdf - Role: Power Conversion - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: 3.3 V LDO supplying low-current logic and PIR rail; sized for sensor/MCU load, not pump current. - Manufacturer Part Number: MCP1700T-3302E/TT - Manufacturer Name: Microchip Technology **Pins:** - GND [pin 1] - VI [pin 3] - VO [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/chrisbrooks1982/cat-deterrent-sprayer-2306~64](https://www.flux.ai/chrisbrooks1982/cat-deterrent-sprayer-2306~64).* --- *Generated from [https://www.flux.ai/chrisbrooks1982/cat-deterrent-sprayer-2306~64](https://www.flux.ai/chrisbrooks1982/cat-deterrent-sprayer-2306~64)*