I had been working on a circuit being powered by the solar energy to charge my phone battery and I realized I could make it more efficient by turning the circuit into a portable weather station sending data to my phone through an Android app(Station) over Bluetooth, so I used Lipo Rider V1.3 to charge a lithium battery with the solar energy generating by a solar panel and to power Arduino Nano with the lithium battery as a current source.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.