Adafruit
12mm Coin Cell Breakout w/ On-Off Switch
A breakout board with a CR1220 coin cell battery holder, an on/off switch, and 0.1″ pitch breakout pins. Ideal for powering very low-current projects or prov...
A breakout board with a CR1220 coin cell battery holder, an on/off switch, and 0.1″ pitch breakout pins. Ideal for powering very low-current projects or providing switchable battery backup for a real-time clock (RTC) module.
The board breaks out four pins: two ground pins, one switched power pin (controlled by the on/off switch), and one always-on power pin. Comes fully assembled and tested, with a stick of 0.1″ header included for breadboard use.
Key Features
- CR1220 Holder – Accepts standard 12 mm CR1220 coin cell batteries
- On/Off Switch – Control power to your circuit without removing the battery
- Switched & Always-On Pins – Two ground pins, one switched power, and one always-on power output
- Breadboard-Friendly – 0.1″ pitch header pins (included, requires soldering)
- Pre-Assembled – Battery holder and switch soldered and tested
Ideal For
- Battery backup for RTC modules with easy power control
- Low-power wearable electronics and LED throwies
- Prototyping projects needing a compact, switchable power source
Package Contents
- 1× 12 mm Coin Cell Breakout Board with On/Off Switch
- 1× 0.1″ header strip
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- 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.
- RTC
- A Real-Time Clock keeps track of time even when the main processor is asleep or powered down, usually with a small backup battery. It matters for data logging and tracking projects that need accurate timestamps.
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Components
Power & Batteries
Related Tutorials
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