Adafruit
Adafruit TPL5111 Low Power Timer Breakout
The Adafruit TPL5111 Low Power Timer Breakout turns any electronics project into a low-power system by periodically toggling an enable pin. Connect it to you...
The Adafruit TPL5111 Low Power Timer Breakout turns any electronics project into a low-power system by periodically toggling an enable pin. Connect it to your project's enable line, and the TPL5111 will handle the rest — setting the enable pin high at configurable intervals from every 100ms to once every 2 hours, then waiting for your project to signal when it's done.
Unlike the TPL5110 which switches power directly, the TPL5111 controls an enable pin — making it ideal for boards that have a dedicated enable or shutdown pin. While your project is disabled, the TPL5111 draws only ~20µA, perfect for battery and solar-powered applications.
Key Features
- Adjustable Timer – Onboard trim pot sets the interval from 100ms to 2 hours
- Enable Pin Control – Drives an enable pin high/low rather than switching power directly
- Ultra-Low Standby Current – ~20µA draw while the project is disabled
- Done Signal – Your project signals when it's finished so the enable pin can be deasserted
- Watchdog Behaviour – Automatically resets the device if no Done signal is received
- Manual Override – Onboard tactile button to manually trigger enable (or wire your own switch)
- 3V to 5V Input – Compatible with common battery and power supply voltages
TPL5111 vs TPL5110
- TPL5111 (this board) – Controls an enable pin; best when your board has a dedicated enable or shutdown pin
- TPL5110 – Connects and disconnects power directly; best when you can break the power input line
How It Works
- Set the timer interval using the onboard trim pot (or replace with a fixed resistor)
- Connect VDD to your 3–5V power supply
- Connect the Enable pin to your project's enable input
- Connect a GPIO pin from your project to the Done pin
- In your code, set the Done pin HIGH when your task is complete
Ideal For
- Battery-powered sensor nodes and data loggers
- Solar-powered remote monitoring
- Low-power IoT devices that wake periodically
- Projects with boards that have enable/shutdown pins
Package Contents
- 1× Adafruit TPL5111 Low Power Timer Breakout (fully assembled)
- 1× Header strip (requires soldering)
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.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
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Related Tutorials
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