Idea1: You could use a digitally controlled potentiometer at the input opamp to control the amplification. Maarten Kuijk: stays true to his passion: teaching parttime classes as Professor to Master students in Electronical Engineering at the University of Brussels. The signal can then be visualized on your phone, using the oscilloscope app. The Oscilloscope input circuit 3. Good luck with digital scopes.
This is great, thanks for showing us. Some apps have been created for this purpose, here is a list of them. An integrated power supply in the housing could improve the portability of the project. They are generally used in designing, testing, troubleshooting and repairing electronic or electroacoustic devices. I realize its been long 2010, are you still supporting kind of? I'm going to use it in my future project. The circuit not work on my Android Phone, the signal not appears, only appears an interference.
Obviously, this project can not compete with the quality of professionals signal generators and oscilloscopes. It visualizes an electric potential over time function, producing much more information than other potential and current measurement methods. I made the oscilloscope circuit and i have a problem. With LabNation, he is looking forward to take a more leading role. Provide details and share your research! Check the compatibility of these apps on your phone is the first step of this project.
You might need to add an op amp between the probes and the input to the tablet. I reused and improved his circuit to include it in my project. If the circuit operates correctly, the output signal shall be sinusoidal and has the same frequency as the input signal generated by the waveform generator. This can be used to attach a scope lead to the jack socket. The transmitter circuit uses Microchip's for the analog-to-digital conversion of the input signals on two channels. Signals up to ±50V up can be injected on the input of the circuit. I am just starting to look into development projects for the Android and believe this would be a great learning tool for myself.
To test the proper operation of the signal generator, connect a speaker to the signal generator output power, and generate a low frequency sinusoidal signal between 300Hz and 1kHz. The only way to make all these connections between the phone and the circuit is to use a 3. I saw that when you draw your graph you shift it, I wonder whether I can ask you how can I shift my graph too. Another possible improvement concerns the power supply circuit. To see the result works, connect the male jack cable to the phone and to the female jack of the circuit. While competitors try to imitate traditional scopes by literally demanding the user to rotate knobs with a mouse, the SmartScope makes full use of the touchscreen. I see your work that was a great job.
On the Signal Generator, you can choose the kind of signal you want sine wave is the most common waveform but sawtooth, square and triangular waves are commonly available , his amplitude in volts or percent, and his frequency. Like, multirange selection of input and maybe a few other things. With intuitive operations scroll to zoom or simply drag a rectangle, dragging to reposition and innovative features window pops to foreground on trigger. A zener diode would limit the maximum voltage we feed on the jack keeping the android phone safe while the low pas filter is for anti-aliasing. You had offered to send other the whole project? My analog scopes will likely be working in 10, 20, 30 years. So my question to you is are you still involved in this project? I would like to share ideas with other developers.
I need to know how do I start with the project and if there is anything missing what is it So that I know what I have to fix before hand and then i can try debugging and modding. The keypoint in that was the proper timing for example sample one frame in 1ms, 3ms, 5ms, 7ms etc from trigger and the other frame in 0ms, 2ms, 4ms etc from trigger and then form one waveform. In addition to this there is level measurement and fundamental frequency readings Thanks for contributing an answer to Electrical Engineering Stack Exchange! The oscilloscope is the most frequently used, most flexible device for electric measurements. There are four different types of inputs to cater for the variety of signals possible within a panel. I like your design very much.
Has anyone tried any online courses so far. For safety reasons these panels must be closed in order to operate. A next version of Android will extend this functionality to all phones. How much time and money you got? Before I start this venture I was hopping that you accept to commit in supporting me when and I will hit some difficulties in the programming. The 60hz could be generated in the sound out, and returned thru the resister network at the micin.
It also helps provide some extra power to the rest of the electronic assembly. Maarten acts as mentor to the SmartScope project. Can you please send me files in below email id: girishnayak12 gmail. As far as I am aware there are no direct competitors on the market. But still, it's recommended to use rooted firmware for better performance. Note: I have an Android phone and I used for this project Android apps from the Google Play Store.
The screen look garbaged and the signal display is small but the programs work together. Since it is a microphone input, it might even have a maximum sampling rate of 10 kHz or so, since the human voice has a bandwidth of roughly 5 kHz. This circuit also includes a power stage called push-pull , using two power transistors and voltages coming from the voltage regulators. The first output circuit of the Signal Generator 4. The entire project is supplied with +12V and -12V, which are converted to + 8V and -8V by the 7808 positive voltage regulator and the 7908 negative voltage regulator. When writing this tutorial, I wanted to provide excellent quality pictures to facilitate the making of my project.