This project might be a game changer for many, electronics enthusiasts no need to spend tons of money for an oscilloscope to measure basic parameters of a wave. We get three solid functionalities from this project:. The frequency and time period of the signal will be showcased on 16 x 2 LCD display. There are two methods for visually representing the waveform on the computer screen which will be described in later part of the article.
The proposed setup consists of arduino which is the brain our project as usual, a 16 x 2 LCD display, IC10K potentiometer and a computer preferably a windows machine. If we choose other models of arduino board we need external USB to serial converter which might complicate the project. The above circuit is self-explanatory. We can find similar connection between the display and arduino on other LCD based projects.
The 10K potentiometer is used to adjust the contrast of the 16 x 2 LCD display which must be set by the user for optimum view. The function of IC is to eliminate any noise signal from the input and fed to frequency sampling pin A0.
The IC only outputs rectangular waves which is a great advantage for arduino, since arduino is more capable of processing digital signal than analogue signals. Once you completed the hardware part and uploaded the above code. This can done in two ways, the easiest and laziest way is described below. The test mode is to check proper functioning of the oscilloscope. The pin 9 is programed to give Hz output. We can zoom in and out of the generated waveform; we can set trigger functionality, offset control over vertical and horizontal axis etc.
If you select the correct COM port, you can see readings as illustrated below. As you can see there are some control buttons on the software by which you can analyze the waveform better.
Arduino FIO LCD Oscilloscope
Once you press the button it will show the frequency and time period on LCD display at the same time waveform will freeze on the computer screen as long as you keep pressing the push button. You may also consider this as an advantage since you can stop the frequency on the computer monitor at any instant and this may give you time to analyze displayed waveform. If you have any further queries regarding this simple single channel Arduino oscilloscope circuit, please feel free to use the below comment box for expressing your specific views.
If you have any circuit related query, you may interact through comments, I'll be most happy to help! Your email:. Great news. I have successfully built this project. While compiling the above Arduino code I am getting errors. I not good in hardware microcontroller programming. Hi Swag, No need now. I have fixed the problem. So to solve this issue I just copied all code in visual studio C file and then replaced qomma and semicolons and the copied that code to Arduino IDE and it worked.
One more thing, I have successfully built frequency meter using Arduino which was in your blog and it worked perfectly. I am almost done with it. Copy the code from this site and paste directly to Arduino IDE. I just copied and pasted on the IDE directly and found no errors and code complied successfully. I think you are using some code editing tool or something like that and copied from there.
If any errors arise further, notify us, we will help you out. Thanks GR, The problem is solved now, but not sure whether Mr. Saqib was referring to your above article or some other external article…. This was from your blog.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. Oscilloscope for Arduino nano, using x64 display tailoring ug8 library for graphics. Edited code from semifluid.
Voltage ranges were adjusted from 3. Sampling was off for Arduino nano, this board is capable of sampling frequency 65 kHz! Two for setting the sampling increase and decrease and one button for changing the range.
Adding a new variable caused instability and design didn't work well anymore. Memory space is maxed out. There is still lot of room for program. This code should work on AtMega based boards Uno and Nano. Leave a comment from your testing. Skip to content.
Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
Sign up. Other Branch: master. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit Fetching latest commit…. Application specific adjustments You need to change declaration for your display and its connection. See ug8 documentation.
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window.It has been 7 years! I have long since taken the circuit apart, sold my PIC microcontrollers, and moved on in my life as one can surmise from my most recent posts detailing my graduate and postdoctoral work.
So, I ordered one of the graphical LCDs, waited a few weeks for delivery because dx. Thankfully, the code I previously posted was written in C, so porting to the Arduino took only a few minutes. I took advantage of a great open source graphical LCD library u8glib to handle the brunt of the work and added a serial port menu for manipulating the various display parameters.
One important difference between this project and the previous one: Since the Arduino Fio is a 3. However, the code is extremely portable, meaning that you should be able to program any other Arduino and have it up-and-running in no time. Great job!! FIO only has an socket to place a XBee on it, for wireless coms.
Better make it work faster and more usable then converting to stupid arduinos where every dumbass can connect wires without any soldering knowledge. This is a great little project, for teaching or as a starting point for something more powerful. Thank you to the Arthur of this project….
We are Openiumper,an open source hardware promoter from China,I am very honored that you are interested in our product mini LCD module and using it. If you need any help,we are glad to serve you,and you can contact us for technical support at any time. Interesing idea. But unfortunaly very slow response of display.
It can work more as registrator. I currently having problems to compile this code to my arduino, result with following errors: oscilloscope. I had the idea that the scheme is not enough for the amplifier bias voltage. Someone did it? Can you give the scheme?
Indications on the screen is updated several times per second. If you hear any waveform, the oscilloscope begins to slow down readings and schedule may hang for a few seconds, up to seconds. After changing picture hangs again. Can you suggest a solution to this problem? Hello, how are you! I know this post is from the yearbut would like to enteder as is done the part that makes the trigger oscilloscope, had as you explain to me, for I am with a small oscilloscope project but do not want to copy and mount, I I want to like the fact enteder program works.
I await a response. This site uses Akismet to reduce spam. Learn how your comment data is processed. Oops, i now see lines 27 through 34 of the main code show the connections! Pingback: semifluid.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again.
If you have an Arduino and a small 16x2 character LCD you can use this code to create a primitive oscilloscope. Make sure you are able to display ordinary text on your LCD. If all goes well, you should see output like this. You should see something like that. The 9's filling the second line indicate that each one of the top values was repeated 9 times.
That means what you see on screen represent 16x9 analog reading. Try to connect to 5V pin instead, the first line should now be filled with bars while second line is still filled with 9's.
If you connect to 3V pin, you would get half bar as expected. Now your LCD should look like that. We know that RX pin is pin 0 on Arduino board but let's imagine this is an unknown circuit and we are trying to find the RX pin.
Make sure your Arduino is connected to your computer and serial monitor is opened, in this example I used buad Try connecting your test pin A0 to RX Pin, you would notice the reading being positive all the time since we are not writing anything to the serial console yet. You would notice the LCD's reading has changed to something like this. Your output may differ if using different bitrate, on linux use stty to find your console's current speed.
Based on that you can be confident this is the RX pin, also since high signal is represented by full bar we know it's a 5v serial communication.
If it 3v serial communication, the bar would've only been partially full. LCD screen can only show 16 character per line. To make things worse, refreshing it quickly make the display unreadable. So, in order to save up space we try to write each value once and state it's repetition count below it. Since I am only able to represent repetition with one digit, I resort to voltage's bars to represent values beyond 9. That way number can be represented up to So after repetition number 9, you get the dotted bar until repetition number 19, then you get a dash until 29 and so on until In this case Arduino will perform analog reading for each LCD character 16 so in total Arduino needs to perform 16, reading before showing any result on your LCD.
Current implementation does the work on two separate phases.Add the following snippet to your HTML:. Read up about this project on. Every electronics enthusiastic or student need a useful tool like an Oscilloscope in order to build and debug his projects. A Digital Storage Oscilloscope is the most common configuration for this type of device.
The Youtube is full with beginners build oscilloscopes that sweep signal from the right to the left or use some chart plotting.
Making a Single Channel Oscilloscope using Arduino
But a true DSO need to have the following features:. Therefore with these specification I started to build a friendly interface with Processing 3 for what I will measure. On the other side with measure principle I build the following flow chart:.
It use DSO principle, a memory which store the recorded samples. After I write the code for this flow diagram, I moved on graphic interface in Processing 3. And it look like:. Now the last element was to make transmission between PC and Arduino board and vice versa.
The only option was USB. For more info you can read here. Log in Sign up. Arduino Oscilloscope. Published November 3, Advanced Protip 10, Things used in this project.
But a true DSO need to have the following features: A stable imagine or a signal capture which is refreshed A trigger in order to make a stable signal capture Buttons to change deflection on X and Y axis Some measurements tools. Follow Contact Contact. Related channels and tags data collection.This Arduino oscilloscope is perfect if you need an oscilloscope right nowbut all you have is an Arduino.
Check out my new article on how to build an Arduino oscilloscope with 7 lines of code. I needed an oscilloscope to debug my Radar Arduino library. First of all you need some code to read the analog value from the analog input pin A0. You can do this easily by using the analogRead function. Then you need to send this value over to your computer using the serial port. There are plenty of ways to do this. In the following code, the value is sent as two bytes with one 0xff byte in between.
This code reads an analog input and writes the value to the serial port. Upload the following code to your Arduino:. This is really all it takes on the Arduino side to make an Arduino oscilloscope. But to display the values, you need some code on you computer too. You need something on your computer to receive the values that are sent from the Arduino, and display them nicely. Processing is a simple programming environment to do this.DIY Arduino Oscilloscope for 5$
Copy and run the following code in processing to get a nice oscilloscope interface on your computer:. You should now be able to use these wires to measure things and see the measurement on your computer. Oscilloscopes are actually very easy to use, once you learn a few basic things: Learn how to use an oscilloscope. Return to What is Arduino? This is really a very cool way of getting around an oscilloscope, but I was wondering how accurate it is. So if you need precise measurements, this is not the way to go.
Cool little project, thanks Oyvind! A few thoughts… One can get good accuracy if rather than sampling from within an indeterminately-sized loop, one instead bases the sample timing on some kind of reliably consistent clock.
Or, for those who really want serious high accuracy, a dedicated real-time clock RTCshould be used. The DS chipcan send clock ticks as fast as kHz over its serial I2C interface, thus your oscilloscope could sample frequencies as high as kHz.
Not bad. FFT on the Arduino… what was I thinking? Of course someone has done it! Maximum amplitude for the ADC is 5V. Thank you for the great project. I am having some difficulty since I have no idea about processing softwareI have followed all the steps given above but the processing software does not show any wave instead on arduino serial monitor window there are continuous stream of various symbols. So I will be thankful if someone could help me.
The continouos stream of symbols on the serial monitor is a good sign. At least something is coming from the Arduino. Is there a way that you could read 3 or 4 signals at the same time?The Oscilloscope is one of the most important tools you will find on the workbench of any electronics engineer or maker. It is primarily used for viewing waveform and determining voltage levels, frequency, noise and other parameters of signals applied at its input that might change over time.
It is also used by embedded software developers for code debugging and technicians for troubleshooting electronic devices during repair. These reasons make the oscilloscope a must have tool for any engineer. Oscilloscopes generally involve the visual representation of an analog signal applied to its input channel. To achieve this, we need to first convert the signal from analog to digital and then plot the data. For the conversion, we will be leveraging on the ADC Analog to Digital converter on the atmegap microcontroller used by the Arduino to convert the Analog data at the signal input to a digital signal.
After conversion, the value per time is sent via UART from the Arduino to the PC where the plotter software which will be developed using python will convert the incoming stream of data to a waveform by plotting each data against time. The schematic for the Arduino Oscilloscope is simple. All we need to do is connect the signal to be examined to the specified Analog pin of the Arduino.
However, we will be using the LDR in a simple voltage divider setup to generate the signal to be examinedsuch that the generated waveform will describe the voltage level, based on the intensity of light around the LDR. We will be writing codes for each of the two sections. For the Plotter as mentioned earlier, we will be writing a python script that accepts the data from the Arduino via UART and Plots, while for the converterwe will be writing an Arduino sketch that takes in the data from the ADC and converts it to voltage levels which are sent to the plotter.
We will be using a couple of libraries including; drawnow, Matplotlib and Pyserial with the python script as mentioned earlier. Pyserial allows us to create a python script that can communicate over the serial port, Matplotlib gives us the ability to generate plots from the data received over the serial port and drawnow provides a means for us to update the plot in real time.
There are several ways to install these packages on your PC, the easiest being via pip. Pip can be installed via command line on a windows or linux machine. PIP is packaged with python3 so I will advise you install python3 and check the box about adding python to path. If you are having issues with installing pip, check out this the official python website for tips. With pip installedwe can now install the other libraries we need. Open the command prompt for windows users, terminal for linux users and enter the following.
Drawnow is sometimes installed alongside matplotlib but just to be sure, run. The python script for this project is similar to the one I wrote for the Raspberry Pi Based Oscilloscope. Next, we create and initialize the variables that will be used during the code. The array val will be used to store the data received from the serial port and cnt will be used to count.
Data at location 0 will be deleted after every 50 data counts. This is done to keep the data being displayed on the oscilloscope. Next, we create the serial port object through which the Arduino will communicate with our python script.
Ensure the com port specified below is the same com port through which your Arduino board communicates with the IDE. The baud rate used above was used to ensure high speed communication with the Arduino.
To prevent errors, the Arduino serial port must also be enabled to communicate with this baud rate. We also set the title, label each axis and add a legend to make it easy to identify the plot.
With this done, we are now ready to write the main loop that takes the data from the serial port when available and plots it. To synchronize with the Arduino, a handshake data is sent to the Arduino by the python script to indicate its readiness to read data.
When the Arduino receives the handshake data, it replies with data from the ADC. Without this handshake, we will not be able to plot the data in real time. The second code is the Arduino sketch to obtain the data representing the signal from the ADC, then wait to receive the handshake signal from the plotter software. As soon as it receives the handshake signal, it sends the acquired data to the plotter software via UART.
We start by declaring the pin of the Analog pin of the Arduino to which the signal will be applied. Lastly, the voidloop function which handles the reading of the data, and sends the data over serial to the plotter.