Magnetic Contact Switch Sensor for Arduino

Name: Magnetic Contact Switch Sensor for Arduino
Brand: DFRobot
SKU: SEN0481

Magnetic Contact Switch Sensor for Arduino — DFRobot — SEN0481

Compact reed-switch magnetic contact sensor in a plastic case with two reed contacts, suitable for door/window detection in automation, smart home, and security systems.

Start wiring

Analog · Single data line · Bare

SparkFun describes COM-09190 as a breadboard-friendly 12 mm square momentary pushbutton with a large button head and tactile click.

Buttons & switches

105 other options

Most parts here are simple contacts: press or release, open or closed. A few outliers — rotary switch potentiometer breakouts, NeoPixel potentiometers, wiper plungers — carry separate wiring requirements worth checking before you order.

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SparkFun Rotary Switch Potentiometer Breakout visual preview

Related groups

4 groups

Keypads

Matrix keypads, analog ADKey boards, I2C keypad controllers, joysticks, and finished USB-HID keyboards are all here. Pin budget and simultaneous-press requirements are the splits that matter.

Input & controls · Keypads & controllers · 37 parts

Encoders

Bare EC11 quadrature encoders, I2C navigation encoders, absolute AS5600 and 8421 encoders, slide and ribbon potentiometers, and digital I2C pots — covering most ways to read angular or linear position.

Input & controls · Rotary encoders · 27 parts

Touch

MPR121, CAP1188, CAP1203 Qwiic slider and AT42QT breakouts are sensor ICs for electrodes you wire yourself. Simple single-pad modules like the TTP223B give you one digital output with no bus required.

Input & controls · Touch sensors · 14 parts

3D printing

DFRobot 1.75 mm PLA in 1 kg spools makes up the bulk of the group, in over 15 colors. Specialty options include PVA in both diameters, NinjaFlex flexible filament, Proto-Pasta conductive PLA, and wood-fill. OverLord printer spares and OverLord printers round out the hardware side.

Tools & prototyping · 3D printing · 53 parts