Using PWM outputs with an Arduino and a LED @ The Custom Geek. Jeremy writes… [via]
Hi everyone, been a while since my last post, but I have been a busy new daddy. I wanted to demonstrate what PWM output was and how to use it nicely in a sketch. I’m really big on ramping lights on and off (my entire house is set up that way) and would like to share how do accomplish that. I also wanted to use a video to show PWM outputs on a scope to help me explain the process.
Using PWM outputs with an Arduino and a LED - [Link]
Nyan Cat – Driving an ‘Adafruit ST7565 Negative LCD Display’ with a Netduino… Fabien writes – [via]
I have been waiting for an excuse to use a Nyan Cat in a blog post and the ‘ST7565 Negative LCD Display’ released by Adafruit being equipped with RGB LED backlights was the perfect occasion. After all, RGB LEDs can create a ‘rainbow’, right? All that’s needed is a cat to go with it and Voila!
Nyan Cat – Driving an ‘Adafruit ST7565 Negative LCD Display’ with a Netduino - [Link]
Comparing Adafruit and Gravitech microSD boards. [via]
The shape is a bit different, but both boards work as intended. Both have LEDs, but the Gravitech LED is on whenever a card is inserted (I think using the socket’s mechanical card detect switch) and the Adafruit LED blinks while data is transferred to/from the card, which I think is the more useful function. Both have “push/push” type sockets (to release card, push in, it clicks and springs back out). They are from different vendors; the Gravitech sockets seemed to have a bit more friction and were more sticky overall, and tend to grab on to the cards rather than release them cleanly, but they seem to improve a bit after a few cycles.
Comparing Adafruit and Gravitech microSD boards - [Link]
Simple Examples of Sending MIDI Data from Arduino to Computer… [via]
It’s easy to send data from just one sensor or button on the Arduino to Max/MSP for further processing and routing to music applications. Take the following example, which reads a potentiometer from Arduino analog input pin 0 and sends this data to Max/MSP as a serial stream of bytes. This stream of bytes has a data range of 0 – 127, perfect for MIDI control applications.
Once the data has been received in Max/MSP, it can be routed to a ctlout object, thus allowing control of any parameter in any application that accepts MIDI continuous controller inputs.
Simple Examples of Sending MIDI Data from Arduino to Computer - [Link]
TUTORIAL: Arduino Hacks -Burning bootloader chips using an Arduino.
A lot of people start learning about microcontrollers with an Arduino but then want to build their own projects without having to sacrifice their dev board. Or maybe they want to make their own Arduino variant, that is compatible with the IDE. Either way, a common problem is how to burn the bootloader onto the fresh AVR chip. Since AVRs come blank, they need to be set up to be Arduino IDE compatible but to do that you need an AVR programmer (like the USBtinyISP).
The good news is that you can burn bootloader using your existing Arduino with only a little bit of work. There’s even a minitutorial on the arduino.cc site
This tutorial is an extention of that tutorial. First we’ll show how you can make a permanent bootloader-burner by soldering a 28-pin ZIF socket to a proto shield and use the PWM output line of the Arduino to generate a clock. This will let you ‘rescue’ many chips that have been set to the wrong type of oscillator, or change ones that are set from external oscillator (most Arduino bootloaders) to internal (such as the lilypad).
Arduino Hacks -Burning bootloader chips using an Arduino - [Link]
Lawn Sprinkler the Introduction Part 1. Mike writes… [via]
The new craze for Home Automation is to use technology to Go Green. One aspect of Going Green is about managing resources in a more efficient way. I have seen a number of other hobbyists build projects that manage the amount of electricity or gas that they use within their home. In this project I am going to manage the amount of water I use for watering my lawn. In part 1 of this series I am going to cover the big picture of what I am attempting to do.
DIY sprinkler system with Netduino Plus - [Link]
Arduino Dashboard App @ LVL1. [via]
ArduinoDashboard is an application for viewing analog and digital pin sensor values from an arduino in real time. This can be used with any arduino sketch and now has compiled versions with no need to download processing.org ide. Sources included as well.
Arduino Dashboard App - [Link]
Driving an adafruit VC0706 TTL Serial JPEG Camera with a Netduino @ Fabien’s Bit Bucket. [via]
Earlier this month, AdaFruit released a nice little TTL camera, perfect for security and remote monitoring applications. The camera supports three resolutions (640×480, 320×240 and 160×120), has a built-in motion detection circuit and can output an NTSC signal, all in a fairly compact form factor. The communication with the camera is done over a TTL UART @ up to 115200 bauds…
As I’m working on a security-related project involving the Netduino, it was the perfect opportunity to put this camera to the test, starting with writing a C# driver. While interfacing with the camera over the TTL UART of the Netduino is straight forward, the datasheet describing the protocol and commands required to control the camera functions is painfully sketchy and sometime inaccurate. In some instances, some camera functions such as OSD (text overlay) are not supported in the firmware even though the datasheet documents them or only behave properly if called in a particular sequence, which of course, is not documented…
Driving an adafruit VC0706 TTL Serial JPEG Camera with a Netduino - [Link]
We’ve updated our excellent character LCD tutorial to include a section about RGB-backlit LCDs, with wiring images, video and example code!
Arduino Tutorial – connecting a parallel LCD - [Link]
Apps4Arduino – [via]
We created Matatino, a framework that lets you communicate between your Mac applications and your Arduino. You can follow our tutorials to get started with adding Matatino to your project.
To see Matatino in action, check out Meters for Arduino.
We will be adding more examples, libraries and tutorials for the Android ADK, iOS Redpark Serial Cable, Processing and OpenFrameworks in the future! You can stay informed about updates through RobotGrrl’s blog Apps4Arduino category feed.
Do you have a hardware project that you need some great software for? Tell us about it, and we would love to help you out!
Apps4Arduino - [Link]