PowerBoost 500 Charger - Rechargeable 5V Lipo USB Boost @ 500mA+ Shipping:4-6 Days As well as the following

As well as the following work examples:

(See item #3753 for an assembled version

The DS1307 RTC is accessed via the I 2 C protocol

Barometer: 260 mbar to 1260 mbar (26 kPa to 126 kPa)

DFRobot FireBeetle series is low-power development board designed for the IoT projects

PowerBoost 500 Charger - Rechargeable 5V Lipo USB Boost @ 500mA+ Shipping:4-6 Days As well as the followingPowerBoost 500C is the perfect power supply for your portable project! With a built in battery charger circuit, you'll be able to keep your project running even while recharging the battery! This little DC DC boost converter module can be powered by any 3. 7V LiIon LiPoly battery, and convert the battery output to 5. 2V DC for running your 5V projects. If you need a 1A battery charger, smart load sharing, and 1A iOS resistors, check out the Powerboost