Switches, Buttons, and Relays

Pololu Power Switches

These breadboard-compatible modules are alternatives to bulky power switches. Since the main current does not flow through the mechanical switch, a variety of small, low-power switches can be used to control a lot of power. Additional inputs enable control of these switches from a microcontroller output or other digital signal.

RC Switches

The Pololu RC switches make it easy to turn devices on and off with a standard hobby radio control (RC) system. Several versions are available, ranging from one with a simple digital output to modules with integrated MOSFETs, relays, or multiplexers.

Relay Modules

These electrically operated switches make it possible to control circuits with low-power signals while offering electrical isolation between the controlling circuit and the circuit being switched.

Products in category “Switches, Buttons, and Relays”

Pololu item #: 2596
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FPF1320 Power Multiplexer Carrier with USB Micro-B Connector

This breakout board for Fairchild’s FPF1320 acts as a power multiplexer, allowing you to select which of two power sources is connected to a load while blocking reverse current into either of the sources. It handles up to 1.5 A of current at 1.5 V to 5.5 V and also breaks out a USB Micro-B connector that can be used to supply one of the input power rails.

Pololu item #: 1406
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Toggle Switch: 3-Pin, SPDT, 5A

This heavy duty single-pole, double-throw (SPDT) toggle switch makes a great power switch or state selector for user interfaces. It is rated for 5 A at 125 VAC and 2 A at 250 VAC.

Pololu item #: 1408
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Snap-Action Switch with 50mm Lever: 3-Pin, SPDT, 5A

This single-pole, double-throw (SPDT) momentary switch can be used as a general-purpose micro switch, but the long lever arm makes it especially useful as a tactile bump sensor for your robot (e.g whiskers or antennae). The switch body dimension is 20.0 x 6.4 x 10.2 mm, and the lever arm is 50 mm long.

Pololu item #: 1402
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Snap-Action Switch with 16.3mm Roller Lever: 3-Pin, SPDT, 5A

This single-pole, double-throw (SPDT) momentary switch can be used as a general-purpose micro switch or tactile bump sensor for your robot. The switch body dimension is 20.0 x 6.4 x 10.2 mm, and the 16.3mm lever arm is has a roller at the tip.

Pololu item #: 1405
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Mini Snap-Action Switch with 13.5mm Lever: 3-Pin, SPDT, 2A

This miniature single-pole, double-throw (SPDT) momentary switch can be used as a general-purpose micro switch or as a small tactile bump sensor for your robot. The switch body dimension is 12.8 x 6.0 x 6.5 mm, and the lever arm is 13.5 mm long.

Pololu item #: 1400
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Servo Switch Harness 12"

This 12" (30 cm) harness has an inline on/off switch, with a 0.1" 3-pin female connector on one end and both a male and a female connector on the other.

Pololu item #: 2171
Price: \$2.95
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Servo Switch Harness 18"

This 18" (45 cm) harness has an inline on/off switch, with a 0.1" 3-pin female connector on one end and both a male and a female connector on the other.

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