led visualizer

It is really necessary to add two resistors upstairs, or the current flowing through the LED and transistor will burn the LED and tube. at that time, I only wanted to draw a schematic diagram. After replying to the post, I remembered that I had to add a throttling resistor.However, the resistance value selected upstairs does not seem suitable.Assume that the on-going voltage drop of the

Today, I tried to drive the LED screen of a digital tube. I used a common cathode LED screen of a product to check the LED screen of a digital tube based on the circuit diagram. The Code is a little lengthy. There are several driver methods. Here is just one of the most direct solutions. We need to make time to make more efficient calls and driver solutions.

The company stayed for one afternoon and looked at the android WiFi framework. It was still ignorant. It's all strange that I couldn't sleep yesterday, and I didn't want to turn on the air conditioner. Alas, summer is over. But it's a bit rewarding. After dinner, return to the dormitory. I thought, I used to look at the output of the serial port in the last few experiments. I was so boring that I used to play 51 or FPGA or something. So I thought I had to make some practical work. Okay, remember

Reference:http://blog.csdn.net/qq_28992301/article/details/52385518http://blog.csdn.net/zoe6553/article/details/6372445Http://blog.chinaunix.net/uid-25014876-id-111745.html1: What is the platform bus?Platform bus is different from the physical bus USB, I²c, SPI, pic bus virtual bus, some USB device location needs to be addressed via the USB bus,And some similar to the SOC internal peripherals such as the LED watchdog timer is directly addressed throug

1. Press the "Power" button on the back of the monitor. (The following "power" key action, all refers to this key.) ） 2. There are 5 small icons appearing at the bottom right of the screen. 3. Move the "power supply" key up. 4. Move the cursor to the location of the menu, press the "Power" button. 5. Toggle the "power" button up or down, move the cursor to "system", press "power" key. 6. Toggle the "power" button up or down, move the cursor to "turn

In this case, the main purpose is to realize the flashing of the LED lamp. First analysis led driving mode, this experiment is used openm3v, built-in 8 LEDs are used to drive the flow (low-power Pingliang). If you want to achieve its flicker, you need to give the corresponding port a constant alternating level of high and low. In the software structure design, adding the use of LED8, you need to be in the P

/int main (void) {/* Configure the GPIO pin mode used by the Shenzhou III LED lamp */Rcc_apb2periphclockcmd (rcc_gpio_led, ENABLE); /* GPIO clock to enable LED lights */Gpio_initstructure.gpio_pin = ds1_pin| ds2_pin| ds3_pin| Ds4_pin; Gpio_initstructure.gpio_mode = gpio_mode_out_pp; Gpio_initstructure.gpio_speed = Gpio_speed_50mhz; Gpio_init (gpio_led, gpio_initstructure); /* The

As a leader in mobile phone chips Qualcomm, the smartphone processor frequency of the pursuit of the slightest disadvantage. With the use of the same processor, the higher the main frequency represents faster speed and better performance. In particular, Qualcomm's Dragon 800/801 series of processors, but also the way to lead the market high-performance trend. Below, by the author for everyone recommended several Qualcomm Snapdragon Dragon Chip top with mobile phone, wherein the main frequency of

I. PrefaceToday, I will teach you how to light the LED, which is the most basic steps to learn the development Board.Two. Principle Analysiscc2530 chip with the core, although it is 51, but it is different from the 51 single-chip microcomputer, 51 microcontroller does not need to configure the IO port, and the cc2530 chip needs to configure the IO port, in order to assign value, need to configure the register has PXSEL,PXDIR,PXINP, X can represent any

　　Using library functions, the result of debugging is on the red program,int main (void){U8 A;U8 T;U8 Len;U16 Times=0;Delay_init (); Time-lapse function initializationNvic_configuration (); Set Nvic Interrupt grouping 2:2-bit preemption priority, 2-bit response priorityUart_init (9600); Serial port initialized to 9600Led_init (); LED Port InitializationKey_init (); Initializing the hardware interface to the key connectionwhile (1){if (usart_rx_sta0x80

Today I finish the "Blinky LED" application on PIC32MZ Starter Kit. This application to LED1 blink with 0.5HZ frequence. The pseudo code is like LOOP : ledon1 second led OFF 1 SecondIt uses Timer1 to control the delay time. So first I implement the three Timer1 functions./** */voidTmr1_open (void) {T1con=0x8010; PR1=0xFFFF;}//Comment a function definition and leverage automat

LED labeled D10, its corresponding Gpio is GPF4, that is, set GPF4 for output, and pull low to low level "specific principle view JZ2440 schematic"1 #defineGpfcon (* (volatile unsigned long *) 0x56000050)2 #defineGpfdat (* (volatile unsigned long *) 0x56000054)3 4 #defineGpf4_o (15 6 intMain ()7 {8 //set GPF4 to output IO9Gpfcon =Gpf4_o;Ten //pull the GPF output all high OneGpfdat =0XFF; A - while(1){ - //set the GPF4 output

1. Visit the website: http://www.airspayce.com/mikem/bcm2835/, the website provides a library file for the Raspberry Pi: Click to download click to download. Follow the prompts to install.2. In the example folder in bcm2835-1.4.2, which is the history file, open the Bink folder, and use Gcc-o blink blink-l bcm2835 to generate blink execution files.3. In the Blink.c file, prompt to control the pin17 pin, that is, the green GPIO0 in the figure, connect the positive pole of the

LED digital tube is widely used in single-chip microcomputer system, it is composed of light-emitting diode. The digital tube consists of 7 LEDs of a "day" shape, if the need to display the decimal point, then add a point, is a 8-segment digital tube.Digital tube Display high brightness, the corresponding speed, sub-common cathode and common anode two forms, commonly used have a single and 4-linked, there are two and dedicated to display time./*******

After you safely delete the USB device from the system, you will find that the LED on the USB device is still on. In fact, this effect was changed only when the Vistaa system was used. The previous XP system was safely deleted and LED lights would be destroyed. At that time, Microsoft made a change to the system and used it until now. If you think that after you delete a USB device, you will be able to turn

Yesterday, a classmate talked to me about an ACM question, which was very interesting. As a result, I listened to the question's requirements: Enter two numbers in each line as follows: 1 1234567890 Output: 2 1234567890 Output 3 1234567890 Output I think you should know the requirements of the questions. Analysis: The above digital output is a bit like LED digital output. I don't know if you know the seven-segment