Keep your microcontroller tickin’ with a ceramic oscillator. These little devices are bread-board friendly (0.1″ pin spacing) and easy to use. They act much like crystals with the ‘stability’ capacitors inside. They have 0.5% accuracy, great for every day electronics and microcontroller work and certainly precise enough for UART or other baud-rate generation. For ultra-high precision needs (USB timing, long-term time-keeping, RF/PLL/VCO driving) you may need a crystal or temperate-compensated oscillator.
To use, connect the two outer pins to XTAL-in and XTAL-out on your circuit (they package is symmetric so use whichever outer pin) and the inner pin to ground.
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.