Adafruit
Step Switch with LED - Three Pack of Black with Red LED - PB86
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These hinged momentary step switches are evocative of the 16-step sequencer keys on TR-808 sythesizers. Also sometimes used on A/V equipment, they're very ta...
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These hinged momentary step switches are evocative of the 16-step sequencer keys on TR-808 sythesizers. Also sometimes used on A/V equipment, they're very tactile with a good clicky feel. And of course, the built in red LED is great for indicating when something is on or off - or as visual feedback when clicked.
There's four legs to the switch for mechanical stability. The switch is momentary SPDT type, there are two pins of the four that act as the common, and they naturally connect to one or the other of the remaining pins when the button is pressed. Check the diagram below to see which pins are the pole and which are the two throws. You may also want to use a multimeter on continuity mode to verify.
Note they are not breadboard or perf-board friendly! You'll need to either hand-wire or design into a PCB.
The LED is a simple 3mm, 20mA max, 2.1V-forward-voltage, red LED embedded into the plastic. There is no resistor built in so a 1K or so resistor will be useful to keep the LED from burning out. Our LED guide will help you on how to pick a resistor - then you can PWM dim the LED from a microcontroller pin, or connect it to a digital output as desired.
Jargon buster
Plain-language definitions for the technical terms used above.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- PCB
- A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
- 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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