This tool might be helpful when picking colors: LED colors are build up out of 3 numbers: You can select the color and it should give you the hexadecimal value of the selected color. Please note that the LED colors might be slightly off — after all they are not calibrated.
Monday, February 3, Arduino - Digital speedometer I have all aftermarket gauges in my car and a while ago my aftermarket speedometer died. The needle just dropped to zero while I was driving down the highway.
Since then I have been using my Garmin GPS as my speedometer but it's maps are really out of date and I actually prefer to use Waze on my iPhone for navigation.
I wanted to ditch the Garmin but then I wouldn't have a speedometer.
I thought it might be fun project to try and build a cheap speedometer using an Arduino Uno and some type of digital display. The redraw on the TFT made the numbers flash which was very annoying. I may use the TFT screen to show other info that doesn't have to be refreshed frequently like average speed and trip distance.
The 7-Segment worked well so I focused on using it. Writing numbers to the 7 Segment display is nearly as simple as a Serial. The only issue I ran into was controlling the brightness. The brightness function in their library didn't work for me. I end up looking at the code in their library wrote my own function.
The backpack on the 7 segment display allows it to be controlled by the Arduino using the I2C protocol also called Two Wire Interface. Without the I2C backpack you would have to directly control all eight segments of each number which would use up all the pins on the Arduino or you would have to figure out some other method which would probably end up being very similar to what Adafruit did.
Each Arduino model has certain pins that are used for I2C. On the Uno pins analog 4 and analog 5 are used for this purpose. See the Wire library page for more I2C info.
What is a VSS? The location of the sensor varies but they all do the same thing which is count the number of times some part of the drive train rotates. On my car the VSS is in the transmission. The output of the VSS is some number of pulses per mile in a 5 vdc square wave signal.
The first step in this project was to find out how many pulses per mile my VSS puts out. This number varies from car manufacturer to car manufacturer and sometimes model to model. I found a company that makes aftermarket cruise control systems and their installation manual contained a list of cars and VSS pulses per mile.
The pulses per mile value can range from all the way up to The VSS on my car puts out ppm which seems to be a common value but you must find out the correct value for your particular vehicle otherwise the readings will be incorrect.
It is important that you only tap into the VSS wire and not completely interrupt it. The engine and transmission computers use this signal as well.My First Arduino Project (Morse Code) May 26, Arduino, Development, The simplicity of writing the code, hitting upload and seeing the effect on the Arduino within seconds makes it really quick to try out different ideas.
The only bit that’s tricky (for me at least) is the electronics side of things. ← Chumby Podcast Client.
Writing a Library for Arduino. This document explains how to create a library for Arduino. It starts with a sketch for flashing Morse code and explains how to .
Watch video · In this project we will develop a tone generator using Arduino Uno.. We will have buttons interfaced with the UNO and each one of them generates different intensity of tone. The frequency of tone generated by the UNO is same at every internal.
Most modern code development environments try to help with proper formatting, and the Arduino IDE is no different. However, the IDE isn’t proactive as some of the more professional-focused tools.
For this reason, one of the least used, yet very powerful features of the IDE is hidden in the Tools menu. The built-in Automatic Program Generator for AVR, AVR8X and XMEGA chips, allows you to write in a matter of minutes all the code needed for implementing the following functions.
Copy and paste the above code in the Arduino IDE to program your Arduino. Used Libraries: All characters of the text are scrolling from left to right vertically and due to combined fixed module, I am unable to change the position of any display unit.