c_meyer/pxt-ev3
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

color sensor examples (#894)

Browse Source 
* tank zigzag

* reflected light measure

* adding links

* added reflected light calibration

* updated summary
This commit is contained in:
Peli de Halleux
2019-08-30 15:03:09 -07:00
committed by GitHub
parent 1fc818767c
commit 0251b914f2
9 changed files with 91 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
docs/tutorials/reflected-light-measure.md Normal file
View File

@ -0,0 +1,29 @@
# Reflected light measure
This example uses a color sensor to measure the reflected light on the dark and light surface
and set the light/dark thresholds.
```blocks
sensors.color3.onLightDetected(LightIntensityMode.Reflected, Light.Dark, function () {
brick.showString("dark", 2)
})
sensors.color3.onLightDetected(LightIntensityMode.Reflected, Light.Bright, function () {
brick.showString("bright", 2)
})
console.sendToScreen()
console.log("move color sensor")
console.log("over DARK color")
console.log("press ENTER when ready")
brick.buttonEnter.pauseUntil(ButtonEvent.Pressed)
sensors.color3.setThreshold(Light.Dark, sensors.color3.light(LightIntensityMode.Reflected) + 5)
console.logValue("dark", sensors.color3.threshold(Light.Dark))
console.log("move color sensor")
console.log("over BRIGHT color")
console.log("press ENTER when ready")
brick.buttonEnter.pauseUntil(ButtonEvent.Pressed)
sensors.color3.setThreshold(Light.Bright, sensors.color3.light(LightIntensityMode.Reflected) - 5)
console.logValue("bright", sensors.color3.threshold(Light.Bright))
forever(function () {
brick.showValue("reflected light", sensors.color3.light(LightIntensityMode.Reflected), 1)
})
```