Merge pull request #64 from adafruit/ptorrone-patch-23

added CRIKIT text

Author: tannewt

_board/circuitplayground_express_crickit.md

@@ -8,9 +8,23 @@ board_url: ""
 board_image: "/assets/images/boards/circuitplayground_express_crickit.jpg"
 ---
 
-This board hasn't been fully documented yet. Please make a pull request adding more info to this file.
+**Crickit** is a **C**reative **R**obotics & **I**nteractive **C**onstruction **Kit**. It's an add-on for the popular Circuit Playground Express that lets you **#MakeRobotFriend** using CircuitPython (and more).
 
-The description should be written to inform a CircuitPython user what makes the board unique and link to relevant info about it.
+Bolt on a Circuit Playground using the included stand-off bolts and start controlling motors, servos, solenoids. With CRICKIT you also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends the Circuit Playground so you can still use all the goodies on the CPX, but now you have a robotics playground as well.
+
+The Crickit is powered by seesaw, a I2C-to-whatever bridge firmware. So you only need to use two data pins to control the huge number of inputs and outputs on the Crickit. All those timers, PWMs, sensors are offloaded to the co-processor.
+
+Includes:
+
+*   4 x Analog or Digital Servo control, with precision 16-bit timers
+*   2 x Bi-directional brushed DC motor control, 1 Amp current limited each, with 8-bit PWM speed control (or one stepper)
+*   4 x High current "Darlington" 500mA drive outputs with kick-back diode protection. For solenoids, relays, large LEDs, or one uni-polar stepper
+*   4 x Capacitive touch sensors with alligator-pads
+*   8 x Signal pins, digital in/out or analog inputs
+*   1 x NeoPixel driver with 5V level shifter
+*   1 x Class D, 4-8 ohm speaker, 3W-max audio amplifier
+
+All are powered via 5V DC, so you can use any 5V-powered servos, DC motors, steppers, solenoids, relays etc. To keep things simple and safe, CRIKIT does not support mixing voltages, use only 5V - not for use with 9V or 12V robotic components.
 
 ## Purchase