SparkFun Nano Power Timer - TPL5110

Sometimes we want to switch on our projects; but sometimes we want to switch them off for a while; to save power. The SparkFun Nano Power Timer runs at minimum power consumption (approx. 35nA) and switches your project on after a certain time. When you are done polling your sensors; posting data on the internet; writing to your logger or planning world domination; your microcontroller can tell the Nano Power Timer; to turn off the power. You no longer have to leave your microcontroller running all day; when you only want to read the ambient temperature once an hour. The TPL5110 delay is configured by using resistors. We have added a 6-way DIP switch; to select one of the five pre-installed resistors. The sixth switch is attached to a pad; to add a custom PTH (or SMD) resistor. The delays; associated with the pre-installed headers; are shown on the bottom of the board for quick setup. Additionally, you can select more than one switch; to combine the resistors in parallel (up to 26 options not including the custom resistor); the connection instructions include a nice overview of the total resistance and corresponding delay for each combination. The Nano Power Timer can handle voltages between 1;8V and 5;5V and currents up to 1;1A with times ranging from 100ms to two hours (pre-configured settings range from 30s to 2h). You will find a button on the board; which allows you to; quickly override the delay; so you can power up your project at any time. - Supply voltage: 1;8V to 5;5V - Current consumption at 2;5V: 35nA Typical (50nA Max) - Selectable time intervals: 100ms to 7200s (2 hours) - Timer accuracy: 1%. Links: - [GitHub Hardware Repo](https://github.com/sparkfun/SparkFun_TPL5110_Nano_Power_Timer).