Category: GLCD

WiFi-Enabled Arduino Fio using the WiFly RN-XV (RN171XV)

Steven A. Cholewiak Leave a comment

The Arduino Fio is a nice little Arduino board designed specifically to interface with XBee devices. I think it’s a great little board and have used it quite a bit in the past. BUT, I haven’t talked too much about the XBee interface, so for this post, I wanted to demonstrate an example utilizing the XBee socket to get an Arduino Fio onto the web. This is a simple example, just demonstrating communication with the Microchip RN171XV (previously Roving Networks RN-XV) wifi module.

WiFlyTimeWithConsole Example

Click through the break for information on the setup and source code to get the Arduino Fio onto the web.
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Arduino FIO Graphical LCD Console

Steven A. Cholewiak 2 Comments

I have previously shown how to use the Arduino Fio and the mini12864 graphical LCD to create a simple oscilloscope. For this post, I wanted to demonstrate the u8glib console demo because I plan on using the GLCD to debug some of my projects and to provide a visual interface for experiments with the Microchip RN-171-XV.

IMG_6922_cropped

More information on the project, a video of it in operation, and its code after the break.
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Arduino FIO LCD Oscilloscope

Steven A. Cholewiak 32 Comments

It has been 7 years (!) since I posted my PIC18F2550 KS0108 Graphical LCD Oscilloscope code and schematics. 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). However, I still get inquiries about the Microchip PIC oscilloscope, so I decided to recreate it using a simpler setup using my Arduino Fio.

IMG_4199

Here’s a short teaser video just to show that, yes, it works (going through a couple different sine wave frequencies, some random noise, etc. just to illustrate it working):



Click through the break to get more information on the setup.
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PIC18F2550 KS0108 Graphical LCD Oscilloscope

Steven A. Cholewiak 168 Comments

Using the PIC18F2550 GLCD Text Test as a basis for further experimentation, I put together a simple and accurate graphical oscilloscope using a PIC18F2550 microcontroller and a AGM1264F graphical LCD. The oscilloscope measures the average voltage, the maximum voltage, the minimum voltage, the peak-to-peak voltage, and the zero-crossing frequency for a DC signal over 100 samples. The oscilloscope has a built in edge trigger function that can be set to capture on rise or fall (or disabled altogether). The time scale for the display is variable and can be easily redefined using the changeTimeDivision function. Likewise, the voltage range can be change to 0-5V, 0-2.5V, and 0-1.25V. The main limitations of this oscilloscope include relatively slow acquisition time and sampling rate (~60kHz) and the fact that the inputs are limited by the constraints of the internal ADC. However, it is a very nice display and I highly suggest you view the videos to see it in action. Read More