您可以在此处获取有关欧姆定律的更多信息:Learn About Ohm’s law, GPIO, and transistors by simple LED circuit on Raspberry Pi(通过Raspberry Pi上的简单LED电路了解欧姆定律、GPIO和晶体管)。 电阻器的侧面印有4个或5个色带。您可以通过色带知道其电阻值。色带的含义如下表所示。第一个和第二个数字组合起来...
The circuit: - Use the onboard LED. - Note: Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to the correct LED pin independent of which board is used. If you want to ...
然而,Arduino也有一个LED,你可以从你的草图中控制。 该LED内置于Arduino板上,通常称为“L”LED,因为这是它在电路板上的标记。 这个LED的位置在下面的Arduino Uno和Leonardo的图片上以红色圈出。 您可能会发现,将Arduino电路板的“L”LED连接到USB插头时,它已经闪烁。 这是因为Arduino主板通常会随附预装的“Blink...
所以LDR上的光会自动控制电源LED的强度。下面是这将如何工作的流程图,向上箭头符号表示“增加”,向下箭头符号表示“减少”。 光强度(在 LDR 上) ↓ - 电阻↑ - 模拟引脚电压↓ - 占空比 (PWM)↑ -功率指示灯亮度↑ 如果其外部完全亮起(当模拟值增加超过 500 时),电源 LED 将熄灭。 这就是使用 LDR 自动...
in this case to control the brightness of an LED. The data is sent in individual bytes, each of which ranges from 0 to 255. Arduino reads these bytes and uses them to set the brightness of the LED. The circuit: LED attached from digital pin 9 to ground. ...
Turns on and off a light emitting diode(LED) connected to digital pin 13, when pressing a pushbutton attached to pin 2. 点亮和熄灭连接到数字针脚 13 上的 LED, 当按下连接到针脚 2 上的按钮开关。 The circuit: 电路连接 - LED attached from pin 13 to ground through 220 ohm resistor ...
Turns on and off a light emitting diode (LED) connected to a digital pin, without using the delay() function. This means that other code can run at the same time without being interrupted by the LED code. The circuit: * LED attached from pin 13 to ground. ...
按键控制LED程序。 连接大电阻是为了确保2号引脚一直是低电平。这个电阻被称为下拉电阻。 /*Button Turns on and off a light emitting diode(LED) connected to digital pin 13, when pressing a pushbutton attached to pin 2. The circuit: - LED attached from pin 13 to ground ...
基于Arduino的无线电控制LED灯条设计说明:我们爱好者喜欢开关,控制东西和LED灯,这个项目是这些元素的组合,遥控器使用两个通道点亮LED灯条,我想知道它是否会响应,结果是非常重要的,甚至超出我的预期。无线电接收器输出我们连接到Arduino的PWM信号。我使用了ELE(通道2
I2C全称是Inter-Integrated Circuit,是1982年由飞利浦半导体公司(现在为NXP Semiconductors)发明的。I2C具有多种功能: 同步(Synchronous):通过主机和从机之间共享的时钟信号,位输出与位采样同步。 多主机(Multi-master):您可以有多个主机控制一个或多个从机。