RC car lesson (#519)

* initial drop

* fixing summary

* adding images

* Adding basic connect code

* connect section

* moving video

* adding ignores

docs/projects/rc-car/connect.md

@@ -0,0 +1,54 @@
+# Connect
+
+
+https://youtu.be/XXesoUC0XBU
+
+We are going to use radio to remote control the toy car. 
+A second @microbit@ will send commands to control the throttle and the steering.
+
+```blocks-ignore
+let steering = 0
+let throttle = 0
+radio.onDataPacketReceived( ({ receivedString: name, receivedNumber: value }) =>  {
+    led.toggle(0, 0)
+    if (name == "throttle") {
+        if (value > 0) {
+            kitronik.motorOn(kitronik.Motors.Motor1, kitronik.MotorDirection.Reverse, 100);
+        } else if (value < 0) {
+            kitronik.motorOn(kitronik.Motors.Motor1, kitronik.MotorDirection.Forward, 100);
+        } else {
+            kitronik.motorOff(kitronik.Motors.Motor1);
+        }
+    } else if (name == "steering") {
+        if (value > 0) {
+            kitronik.motorOn(kitronik.Motors.Motor2, kitronik.MotorDirection.Forward, 100);
+        } else if (value < 0) {
+            kitronik.motorOn(kitronik.Motors.Motor2, kitronik.MotorDirection.Reverse, 100);
+        } else {
+            kitronik.motorOff(kitronik.Motors.Motor2);
+        }
+    }
+})
+basic.forever(() => {
+    throttle = 0
+    if (input.buttonIsPressed(Button.A)) {
+        throttle = 100
+    } else if (input.buttonIsPressed(Button.B)) {
+        throttle = -100
+    }
+    radio.sendValue("throttle", throttle)
+    steering = 0
+    if (input.acceleration(Dimension.X) < -512) {
+        steering = -100
+    } else if (input.acceleration(Dimension.X) > 512) {
+        steering = 100
+    }
+    radio.sendValue("steering", steering)
+})
+radio.setGroup(12)
+```
+
+```package
+radio
+pxt-kitronik-motor-driver=github:kitronikltd/pxt-kitronik-motor-driver#v0.0.3
+```