Another Instructables by Jan Henrik, a police light with a Attiny25/45/85. He writes:
Hello, in this project I want to show you how to build a multi functional Police Light with a Attiny25/45/85 .
It will have several animations , which can be changed with a button on the circuit board, it has 2 channels, which can be controlled with PWM. That allows us to add serval animations or police light flashing sequences. The maximum rated current per channel is 500mA, that allows us to control high power LED´s, LED stripes or old Light Bulbs!
Attiny25/45/85 police light with Arduino - [Link]
An Arduino, some addressable LED’s, a bluetooth module, code and a 3D printer come together to make blueShift – An OpenXC LED Tachometer. blueShift is so named for the Bluetooth protocol used for data communication, and the use of a tachometer to indicate when to shift your car. It may be amusing to note that the driver and passengers traveling in this car would observe Blueshift when peering thru the windscreen, provided their velocity was sufficient.
blueShift – An OpenXC LED Tachometer - [Link]
praveen @ circuitstoday.com writes:
Tachometer is a device used for measuring the number of revolutions of an object in a given interval of time. Usually it is expressed in revolutions per minute or RPM. Earlier tachometers purely mechanical where the revolution is transferred to the tachometer through mechanical coupling (cable or shaft) , the rpm is determined using a gear mechanism and it is displayed on a dial. With the advent of modern electronics, the tachometers have changed a lot. This article is about a contactless digital tachometer using arduino. The speed of the motor can be also controlled using the same circuit. The RPM and all the other informations are displayed on a 16×2 LCD screen. The circuit diagram of the digital tachometer using arduino is shown below.
Tachometer using arduino - [Link]
Control physical devices using an Arduino based home automation controller that connects to your network and lets you switch things on and off using a web browser. This episode shows the construction sequence of a controller that combines an Arduino-compatible board, Power-over-Ethernet, and relay driver shields to create a self-contained controller that can serve up its own web interface so you can click buttons in your browser to turn devices on and off.
Building an Arduino home automation controller - [Link]
by prem_ranjan @ open-electronics.org:
We have designed an Oscilloscope using PC and Arduino Board. The signal is first of all fed to the Arduino Board where the analog signal is converted to a digital signal by the ADC which is then serially outputted to the PC and is read by the MATLAB software via the COM ports. Here the signal is read in the form of digital data but then is converted to analog one by using the resolution of the ADC used by the Arduino Board. The MATLAB software was then used to plot the signals.
A PC and an Arduino: here’s your DIY Oscilloscope - [Link]
Possibly the smallestest ATtiny85 based ‘duino derivative.
Recently, Olimex anncounced the Olimexino 85s, claimed to be the “World’s smallest Arduino ever“. Now, that looks like a challenge. I guess it is about time to show off what has been on my desk since some time last year: The Nanite, pictured below.
The Nanite 85 - [Link]
Build temperature & humidity & smoke alarm system based on ICStation Mega 2560 compatible with Arduino( Cost is USD32.39 ONLY) .
The working voltage of this system is DC5V.It can measure the current temperature, humidity and smoke. It can display real-time data by the 1602 LCD and can realize the sound and light alarm when in the dangerous temperature and humidity. It is a simply and easily to operate monitoring alarm system about temperature humidity and smoke.
Build Temperature & Humidity & Smoke Detector Alarm System Based on Arduino - [Link]
By Alasdair Allan:
The Light Blue Bean is a new Arduino compatible board with built-in Bluetooth LE support, and while that isn’t a new idea, the Bean does something different than the other Bluetooth LE enabled Arduino clones I’ve seen so far—it lets you upload your code to the board wirelessly… look ‘ma, no wires!
Hands on with the Light Blue Bean - [Link]
by rbandrews @ imgur.com
How I spent my weekend: making a Arduino-ish handheld game system, with a CNC mill and some misc. electronics.
Making a Handheld game - [Link]
Here is a small personal project to brighten my home made from a cheap IKEA photo frame, and Arduino and a multicolor “NeoPixel” LEDs strip. The goal is simple: to realize a matrix of 12×10 big square pixels able to emit light in any color, and controllable from a smartphone. A simple demo video will explain the principle better (the LED flicker is due to the video and not normally visible)
A decorative LED frame - [Link]