The SparkFun LiPo Fuel Gauge - MAX17043 connects your LiPo battery to your project and uses a sophisticated algorithm to detect the relative state of charge and direct A/D measurement of battery voltage.
The SparkFun Analog MEMS Microphone Breakout makes it easy to work with the Vesper VM2020 analog microphone. The VM2020 is an ultra-high Acoustic Overload Point (AOP), high dynamic range, differential analog output piezoelectric MEMS microphone.
With these 2 versions of SparkFun's XBee3 Thing Plus, we've taken DIGI's XBEE3 802.15.4 and plopped it into the Thing Plus footprint and the result has us all abuzz.
How to measure relative humidity and temperature with the RHT03 (a.k.a DHT22) low cost sensor on a single wire digital interface connected to an Arduino!