2 layers290.1 × 130 mm
2 layers36.5 × 39.1 mm
Securitysystem
obaibironke/securitysystemA custom motion sensor triggered security system that alerts me whenever someone enters my room.
- Size
- 36.5 × 39.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 13
- Nets
- 20
- Pads
- 58
- Tracks, vias
- 153, 20
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 9 Apr 2026
- Updated
- 7 May 2026
Overview
Securitysystem is an open-source printed circuit board by obaibironke, from the obaibironke/securitysystem repository on GitHub. It is a 2-layer board of 36.5 × 39.1 mm with 13 parts on 20 nets, routed with 153 tracks and 20 vias.
It is built around the AMS1117-3.3. Its parts include 3 capacitors, 2 resistors, 2 ICs, 2 connectors and 2 switches. It belongs with the sensors and measurement boards of this library.
Main components
1README
README.mdsecuritysystem
A custom motion sensor triggered security system that alerts me whenever someone enters my room. I made it because my sister kept entering myroom without me knowing so now I can catch her. It detects motion using a PIR sensor that will be soldered onto the PCB directly. It then send this information to the ESP32-S3 so that it can be logged onto the Google Sheet as well as be sent as a Telegram message. The MAX7219 display is just to show how many times motion has been detected since the system was last armed.
Hardware:
Custom PCB XIAO ESP32-S3 PIR motion sensor Photoresistor MAX7219 8-digit display Active buzzer Arm/disarm button Power switch Custom enclosure
What it Does:
This security system uses the PIR sensor to sense when someone passes by it, optionally you can use night mode which works by using a photoresistor to detect light. When motion is detected it makes a short vibration, logs the instance to a google sheet as well as sends an alert through Telegram. There is an additional alert for when motion is detected multiple times in a short period. You can use Telegram to arm it, disarm it, enable night mode, and disable night mode.
BOM:
Images:
Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | C_Polarized | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1, C2 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | Battery_Cell | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2_1x02_P5.00mm_Horizontal | BT1 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_TDK_PS1240P02BT_D12.2mm_H6.5mm | BZ1 |
| 1 | C | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C3 |
| 1 | Conn_01x03 | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | J1 |
| 1 | Conn_01x05_Pin | Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Vertical | J2 |
| 1 | R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | R_Photo | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | SW_SPDT | Button_Switch_THT:SW_E-Switch_EG1271_SPDT | SW2 |
| 1 | Val** | Security System Footprints:XIAO-ESP32-C3-SMD | U3 |
Questions
How big is the Securitysystem PCB?
It measures 36.5 × 39.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Securitysystem use?
13 parts, built around the AMS1117-3.3. 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 Securitysystem KiCad files?
From the obaibironke/securitysystem repository on GitHub, at the commit this page was made from: the board is PCB/Security System.kicad_pcb and its schematic PCB/Security System.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Securitysystem design in my own project?
Its repository states no licence, so its author keeps all rights: ask obaibironke before reusing the design.
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