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Button Pad 2x2 - Breakout PCB
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A simple breakout board for 2×2 button pads with integrated LEDs. Each LED and button is brought out to side connectors, making wiring straightforward. The b...
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A simple breakout board for 2×2 button pads with integrated LEDs. Each LED and button is brought out to side connectors, making wiring straightforward. The board also includes footprints for 1N4148 through-hole diodes to isolate switches for easier matrix decoding.
Key Features
- 2×2 Button Layout – Breaks out each LED and button to individual side connectors
- Diode Footprints – Onboard pads for 1N4148 diodes to isolate switches in a matrix configuration
- Back-Side Connectors – Soldered to the rear of the PCB to keep the button side clear
Ideal For
- Custom button pad interfaces and control panels
- LED-backlit keypad projects
- Button matrix prototyping
Tip: Trim the connector leads on the button side as short as possible to reduce pad deflection.
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- 1N4148
- A common small-signal switching diode used for low-current electronic signals. It is a good choice for fast signal switching or simple protection tasks, but not for carrying large power currents.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- 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.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- through-hole
- A mounting style where the component leads pass through holes in a circuit board and are soldered on the other side. Through-hole parts are often easier to handle and solder by hand, which is useful for classroom and hobby projects.
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