Adafruit
Square Silicone Button PWM Controller - 3 Wire - 3.6V to 12VDC
A squishy silicone button module with a built-in PWM controller and colour-changing power indicator. Press to cycle through three power levels — 100%, 70%, a...
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A squishy silicone button module with a built-in PWM controller and colour-changing power indicator. Press to cycle through three power levels — 100%, 70%, and 35% duty cycle — with the illuminated power symbol glowing red, blue, or green to show the current setting. Long press for two seconds to turn on or off.
Originally designed for controlling heating pads in wearable thermal vests, this module is a simple way to add adjustable PWM power control to any DC project. It accepts 3.6–12VDC input and outputs the same voltage at the selected duty cycle via three wires (shared ground).
Key Features
- Three Power Levels – 100% (red), 70% (blue), and 35% (green) PWM duty cycle
- Input Voltage – 3.6V to 12VDC
- Wiring – 3-wire: red/black (power input), blue/black (PWM output, shared ground)
- Illuminated Button – Built-in power symbol LED indicates current level
- Long Press Control – Hold 2 seconds to turn on/off
- Silicone Housing – Soft, tactile button with satisfying press feel
Ideal For
- Wearable heating pad and thermal vest projects
- Fan speed control
- Peltier module power management
- DIY projects needing simple adjustable DC power
Package Contents
- 1× Square Silicone Button PWM Controller
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- duty cycle
- The fraction of time a signal or power source is switched on during each repeating on/off cycle, usually given as a percentage. It is central to PWM (pulse-width modulation), where adjusting the duty cycle controls things like LED brightness, motor speed or heater power, and on devices such as proximity sensors it can also affect detection range, response speed, accuracy and power use.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
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