小伙伴们愚人节快乐！为了给愚人节加点料，今天我们来一发恶作剧道具，抛砖引玉。
这是一款机智的恶作剧加农炮，配备人体热释电传感器、3D打印的炮筒、填充好碎纸片作为“炮弹”，一旦有人路过，将会带给他突如其来的惊喜！
▼ 效果展示
所需的组件清单
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5V 稳压器 × 1
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公对公跳线若干
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公对母跳线若干
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12V 600mA 电源适配器 × 1
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人体热释电传感器 × 1
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伺服电机 - 通用合金齿轮（微型尺寸） × 1
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0.1uF 陶瓷电容器 × 1
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TO-220 散热器 × 1
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1uF/25V 电解电容器 × 1
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Arduino Uno R3 × 1
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面包板 × 1
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USB AB转接线 × 1
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3D打印机 × 1
因为这是个开源项目，所以你也可以制作一个或加以改造！
可按照原理图组装机械控制部分，
再3D打印出文件库中的3D模型资源完成炮身的组装。
/* This code sets up the essentials for your circuit to work. It runs first every time your circuit is powered with electricity. */
void setup() {
// Setup Serial which is useful for debugging
// Use the Serial Monitor to view printed messages
Serial.begin(9600);
Serial.println("start");
servo.attach(SERVO_PIN);
servo.write(servoRestPosition);
delay(100);
servo.detach();
}
/* This code is the main logic of your circuit. It defines the interaction between the components you selected. After setup, it runs over and over again, in an eternal loop. */
void loop() {
if (pir.read())
{
// The servo will rotate to target position and back to resting position with an interval of 500 milliseconds (0.5 seconds)
servo.attach(SERVO_PIN); // 1. attach the servo to correct pin to control it.
servo.write(servoTargetPosition); // 2. turns servo to target position. Modify target position by modifying the 'ServoTargetPosition' definition above.
delay(500); // 3. waits 500 milliseconds (0.5 sec). change the value in the brackets (500) for a longer or shorter delay in milliseconds.
servo.write(servoRestPosition); // 4. turns servo back to rest position. Modify initial position by modifying the 'ServoRestPosition' definition above.
delay(500); // 5. waits 500 milliseconds (0.5 sec). change the value in the brackets (500) for a longer or shorter delay in milliseconds.
servo.detach(); // 6. release the servo to conserve power. When detached the servo will NOT hold it's position under stress.
}
}Binary file (no preview)
给 Arduino 烧写文件库中的 C 代码的时候，注意代码中的SERVO_PIN和servoTargetPosition需要根据实际情况修改为相应的值，再加以调试即可！
Enjoy 愚人节的乐趣吧！
原文链接：https://www.hackster.io/circuito-io-team/motion-triggered-confetti-cannon-fcaaa9
译文首发于趣无尽，翻译cherry
硬件军火库
项目可用到的主板👆
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