Raspberry Pi sending code: http://www.cnblogs.com/hangxin1940/archive/2013/05/01/3053467.html
# Prepare the rf24 Library
Https://github.com/maniacbug/RF24
First download the required code
Here, we need the five files 'rf24. H' 'rf24. cpp ''rf24 _ config. H' 'nrf24l01. H' 'printf. H'.Create the rf24 folder in the libraries folder of Arduino and put them in. You can view rf24 in the import of Arduino IDE.
Do
Arduino program upload unsuccessful display system cannot find the specified fileThe error message appears to beAvrdude:ser_open (): Can ' t open device ' \\.\COM1 ': The system cannot find the file specified.AVRDUDE:STK500_RECV (): Programmer is not responding what's going onIf your IDE appears AVRDUDE:STK500_RECV (): Programmer is not a hint of responding, be careful to see if your number 0 and number 1 are plugged in. If you connect the digital tub
For the stm32 oscilloscope, there are a lot of online channels. I want to express my design ideas here. This project has been prepared for a long time. First of all, I would like to thank the previous team. I feel that Chen Shi and Yu have received many considerations from two experienced embedded engineers. If it is not for work adjustment or other reasons, it is very likely that the product will come out. However, I am deeply sorry for not finishing
In the measurement process, the high waveform capture rate is very important for the oscilloscope.Improves the ability of the oscilloscope to capture random events and low probability events.
Before describing the waveform capture rate, you must first understand the concept of dead time.
What isDead Zone Time? That is, the sum of the next collection and data processing time triggered by the oscilloscope
Arduino car entry-fourth day (sensor), arduino car
Hello everyone, I am a small Editor.
Record the content in the previous section and click "open link ".
Today we will talk about sensors.
Today we will talk about light and ultrasound.
Start with a chart:
There are three optical interfaces:
UCC, out, And GND.
Ultrasonic has four interfaces:
UCC, T, E, And GND.
The following is the principle.
The ultrasoni
1. Stepper Motor DriveOnly today to find out .... Originally in the different stepper motor drive module inside, the cycle clock is not the same ....Stepper Motor Drive module and circuit configuration:The main parts of the driver code:int sp_param = 16383;Digitalwrite (motorstp_a, high);Delaymicroseconds (Sp_param);Digitalwrite (motorstp_a, low);Delaymicroseconds (Sp_param);(The top 16383 is the maximum number of unsigned int, or 16ms, or the maximum value of the Delaymicroseconds input paramet
China site
The attenuation device is used to attenuation a large input signal to ensure that the output of the amplifying circuit is not distorted. The main requirement for the attenuation is that the frequency band should be wide enough and the input impedance should be high enough. Since the input impedance of the amplifier circuit connected to the output of the attenuation device is capacitive, the attenuation device usually uses the RC attenuation device. Its principle is as follows:
It c
The last simple introduction of the use of Audiorecord and Audiotrack, this time the combination of Surfaceview to achieve an Android version of the phone analog signal oscilloscope. Recently the Internet of Things is very hot, as a mobile phone software developers, how to do not modify the phone hardware circuit under the premise of integration with third-party sensors it? The microphone is a good ADC interface, through the microphone and third-party
1.1GS/S refers to the sampling rate of the oscilloscope, the front s is the meaning of sample sampling, followed by S is the second, that is, the oscilloscope sampling 1G points A second, 1G is 10 of 9 square. That is, a single ad sample can be completed within 1ns.2. Transducers with high input impedance are usually selected, and the probes are divided into active and passive. The application is more passi
Oscilloscope is in the university when the teacher taught, but out of work has not been used, and gradually forget, and now learn again. Look at the effect chart:
Here is a custom histogram, and then there is a button, click the button, where the pillars will keep moving, similar to the music player in the oscilloscope beat.
Similar to the previous custom view, rewrite the onsizechange () method and th
Weekend play a little Hi, did not update the blog, today to make up, this oscilloscope is in the university when the teacher taught, but out of work has not been used, and gradually forget, and now learn again. Look at the effect chart:
Here is a custom histogram, and then there is a button, click the button, where the pillars will keep moving, similar to the music player in the oscilloscope beat.
Simil
The last time I briefly introduced the use of AudioRecord and AudioTrack, this time I used SurfaceView to implement an Android mobile phone analog signal oscilloscope (PS: I have also talked about the mobile phone oscilloscope OF THE j2_version before ). Recently, the Internet of Things has become very popular. As mobile phone software developers, how can they combine with third-party sensors without modify
This example of oscilloscope includes a PC and a serial port to send messages, it is worth studying.The general idea is that the sensor node collects data, sends one packet to another base node for each 10 data acquisition, and then the base node forwards the data to the PC side. The PC side has a Java program that collects data and displays it. So run this example to two nodes, a burning oscilloscope, a bu
OriginA project under the responsibility of a colleague scans whether something in the hardware exists. Therefore, the boss wants to view the scan results through an image-based interface.
Therefore, we made a small tool to read and visualize the data provided by our colleagues.
The easiest way to display the scan results is the oscilloscope, but the functions of the third-party controls are too cumbersome. In the end, I decided to make a simple one m
The previous simple introduction of the Android program in the development of the use of Audiorecord and Audiotrack, this time combined with Surfaceview to achieve an Android version of the phone analog signal oscilloscope. Recently the Internet of Things is very hot, as a mobile phone software developers, how to do not modify the phone hardware circuit under the premise of integration with third-party sensors it? The microphone is a good ADC interfac
My Android advanced tutorial ------) Android implements music oscilloscope, balancer, bass, and audio field functionsThis example is from crazy Android handout. To implement specific functions, you need to understand the following APIs: MediaPlayer Media Player Visualizer spectrum Equalizer balancer BassBoost bass controller PresetReverb preset sound field controller paintingThe following figure shows the effect.Portrait WaveformBlock WaveformCurve Wa
Use SurfaceView to display the sine curve, simulate the oscilloscope, and surfaceview the sine.
As we all know, views are repainted through refresh. The Android system re-painted the screen by sending a VSYNC signal. The interval for refresh is 16 ms, if the view completes all the operations you need within 16 ms, the user will not feel stuck visually. If there are too many operation logics to be executed, especially the interface that needs to be r
Http://jingyan.baidu.com/article/91f5db1bf715c01c7f05e39a.htmlHttp://cn.tek.com/learning/oscilloscope-tutorial?utm_source=Baidu-Success_Eventsutm_medium=cpcutm_ CAMPAIGN=SUCCESS_EVENTS_SUCCESS_EVENTS_CN (S) _SUCCESS_CN_SCOPE_GUIDECOVID=COVTEKBDU81000000009393SUTM _term=cdrsbdu961sHttp://zhidao.baidu.com/link?url=CRYtFiBdcjsiH6fqDHlHkdNAMLJg43NT6HHsUodUsDySGy5aZkIzZ3vHwi7zIfiyPpXVkvgdLF9rnfPqW84mZq1. Later found that the network transformer instability
several ways to find the PPM signal interface after enabling the receiver:1. Check the chip information. For example, if the Futaba receiver uses the bu4015bf shift register chip, solder The Pin 1 or 9 to a wire. 2. Use an oscilloscope 3. use Arduino to write the program for measuring the pulse width, and find it on the circuit board until some random number estimates appear.
Find and use the following cod
Zookeeper
Let's take a look at the program running in this article (the screen recording speed is slow, and the real machine runs more smoothly ):
In this article, the program uses the 8000hz sampling rate, which requires a high real-time performance for the x-axis drawing. If the resolution of the x-axis is not reduced, the program's real-time performance is poor. Therefore, the program reduces the x-axis data range by 8 times ~ 16 times. Because the 16-bit sampling is used, the height of th
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