# Adafruit TPL5110 Power Timer Breakout ## Overview ![](https://cdn-learn.adafruit.com/assets/assets/000/039/979/medium800/adafruit_products_3435_iso_ORIG.jpg?1489011298) With some development boards, low power usage is an afterthought. Especially when price and usability is the main selling point. So what should you do when it's time to turn around and make that project of yours run on a battery or solar? Sure you _could_ try to hot-air that regulator off, or you could jerry-rig a relay. Or, use a 555? Ugh, the options aren't that great. The **Adafruit TPL5110 Power Timer** is a stand-alone breakout that will turn _any_ electronics into low-power electronics! It will take care of turning your project on/off using a built in timer that can vary from once-every 100ms up to once every two hours. Basically, the TPL will turn on periodically, adjustable by potentiometer or resistor, and turn on your project's power. It will then wait until a signal is received from the project to tell the TPL that it can safely turn off the power. If the TPL does not receive a signal by the set time-out, it will reset the device like a watchdog timer. ![](https://cdn-learn.adafruit.com/assets/assets/000/039/980/medium800/adafruit_products_3435_kit_ORIG.jpg?1489011309) Usage is easy. First, disconnect from power and set your desired delay by adjusting the on-board trim pot: all the way to the left is once-per-100ms an all the way to the right is once-every-2-hours. Then, connect VDD up to your 3-5V power supply and then your project's power-in to the Drive pin. Finally, select a signal pin from your project to the Done pin. In your project's code or design, just make sure that it sets the Done pin high once it is completed with its task. That's it! While the TPL5110 is running (but the remainder of the project is de-powered) the current draw is about 20uA (according to our Monsoon Power Meter) If you want to turn the device on by hand, you can also activate the TPL by pressing the onboard tactile switch (or wire your own switch to the Delay pin) See? Your power problems just got _solved!_ ![](https://cdn-learn.adafruit.com/assets/assets/000/039/982/medium800/adafruit_products_3435_quarter_ORIG.jpg?1489011322) Comes as a fully assembled breakout board with a TPL5110 chip, all components on-board, and some header. A little light soldering is required to put it together for breadboard use. - [Next Page](https://learn.adafruit.com/adafruit-tpl5110-power-timer-breakout/pinouts.md) ## Featured Products ### Adafruit TPL5110 Low Power Timer Breakout [Adafruit TPL5110 Low Power Timer Breakout](https://www.adafruit.com/product/3435) With some development boards, low power usage is an afterthought. Especially when price and usability is the main selling point. So what should you do when it's time to turn around and make that project of yours run on a battery or solar? Sure you _could_ try to hot-air... In Stock [Buy Now](https://www.adafruit.com/product/3435) [Related Guides to the Product](https://learn.adafruit.com/products/3435/guides) ### JST-PH 2-Pin SMT Right Angle Breakout Board [JST-PH 2-Pin SMT Right Angle Breakout Board](https://www.adafruit.com/product/1862) A simple 2-pin connector soldered onto a breadboard-friendly breakout. This is compatible with the "JST PH 2-pin" connector. Mates perfectly with all our 1-cell [LiPoly](//www.adafruit.com/search?q=lipoly) and [LiIon batteries](//www.adafruit.com/search?q=liion)... In Stock [Buy Now](https://www.adafruit.com/product/1862) [Related Guides to the Product](https://learn.adafruit.com/products/1862/guides) ### USB Micro-B Breakout Board [USB Micro-B Breakout Board](https://www.adafruit.com/product/1833) Simple but effective - this breakout board has a USB Micro-B connector, with all 5 pins broken out. Great for pairing with a microcontroller with USB support, or adding USB 5V power to a project. We use a micro-B connector with through-hole shielding pads for an excellent strong... In Stock [Buy Now](https://www.adafruit.com/product/1833) [Related Guides to the Product](https://learn.adafruit.com/products/1833/guides) ### 20mm Coin Cell Breakout Board (CR2032) [20mm Coin Cell Breakout Board (CR2032)](https://www.adafruit.com/product/1870) Simple but effective - this sewable breakout board has a CR2032 coin cell battery holder soldered on and 0.1" pitch breakout pins for easy connecting. Great for powering very low-current projects, or adding a battery backup circuit to a real-time-clock or similar. Comes with... In Stock [Buy Now](https://www.adafruit.com/product/1870) [Related Guides to the Product](https://learn.adafruit.com/products/1870/guides) ### Breadboard-friendly 2.1mm DC barrel jack [Breadboard-friendly 2.1mm DC barrel jack](https://www.adafruit.com/product/373) This power jack is designed to fit 2.1mm power plugs snugly and securely. Perfect for adding a power connector to your project. We went for the more expensive "thin pin" type which snap into breadboards or perfboards. They will work where "thick pin" types go also, just... 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