Boost converters (or step-up converters) are in a class of circuits called DC-DC conversion circuits. These can operate more efficiently than linear regulators like the 7805, and unlike linears they can be designed to have a higher output voltage than their input voltage – potentially useful for low-voltage sources like some steppers.
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.