Touch events example

標題：觸控事件範例
JavaScript (index.html)：

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Start: <div id="t1"></div> Move: <div id="t2"></div> End: <div id="t3"></div> <script type="text/javascript"> document.ontouchstart = function(e) { var px = e.changedTouches[0].clientX; var py = e.changedTouches[0].clientY; e.preventDefault(); document.getElementById('t1').innerHTML = '(' + px + ', ' + py + ')'; }; document.ontouchmove = function(e) { var px = e.changedTouches[0].clientX; var py = e.changedTouches[0].clientY; e.preventDefault(); document.getElementById('t2').innerHTML = '(' + px + ', ' + py + ')'; }; document.ontouchend = function(e) { var px = e.changedTouches[0].clientX; var py = e.changedTouches[0].clientY; e.preventDefault(); document.getElementById('t3').innerHTML = '(' + px + ', ' + py + ')'; }; </script>

說明：
觸控事件取得座標範例。

Servo Motor Control with an Arduino

標題：使用Arduino控制伺服馬達

Arduino (servo_motor)：

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#include <Servo.h> Servo myservo; const int umin = 500, umax = 2400, umid = (umin + umax)/2; const int buttonPin = 2; int buttonState = 0, buttonDownState = 0, motorState = 0; void setup() { pinMode(buttonPin, INPUT); myservo.attach(9, umin, umax); myservo.writeMicroseconds(umid); delay(3000); } void loop() { buttonState = digitalRead(buttonPin); if (buttonState == HIGH) { buttonDownState = 1; } else { if(buttonDownState == 1) { if(motorState == 0) { myservo.writeMicroseconds(umin); motorState = 1; } else if(motorState == 1) { myservo.writeMicroseconds(umid); motorState = 2; } else if(motorState == 2) { myservo.writeMicroseconds(umax); motorState = 3; } else { myservo.writeMicroseconds(umid); motorState = 0; } buttonDownState = 0; } } }

Arduino Diecimila
電阻 - 10kΩ
伺服機 - GWS S03T

說明：
按鈕依序輸出脈衝寬度最小、中間、最大，以控制依序移動伺服機位置。