HORLORGE
Get flash to fully experience Pearltrees
I've implemented a simple IR universal remote that will record an IR code and retransmit it on demand as an example for my IR library . Handling IR codes is a bit more complex than it might seem, as many protocols require more than simply recording and playing back the signal. To use the universal remote, simply point your remote control at the IR module and press a button on the remote control.
Ken Shirriff's blog: An Arduino universal remote: record and playback IR signals
Arduino – Basic Persistance of Vision
I think this’ll be the start of a few more projects for me. I’ve seen some cool LED PoV stuff ( Persistance of Vision ) with mounting displays on bikes, so hopefully I’ll get round to doing something like that. Anyway as a start I’ve got 5 LED’s connected to 5 pins on the Arduino , nothing complex there. The real struggle is to work out the timings , or rather the pauses between the patterns. Starting with how to make a character or drawing. Using my knowledge of graphics etc.. the logical way to do this is to use a grid of pixels and I’ll have the column of LED’s change quickly to represent each column of the grid or frame.
Arduino POV « Insignificant Bits
Since everyone else is doing it, I decided to hack together my own persistence of vision thing this evening. This is a circuit where you have a single vertical line of LEDs, but if you turn the LEDs on and off fast enough and wave them around, your eyes are fooled into seeing complete letters. It only took about 20 minutes to write the C code to load up onto my trusty ATmega8, then I used a camera with a long shutter period to take the picture to the right. I realize my blog has devolved into Bob’s Dumb Project Of The Week lately. I’ll have to work on that.
Une des expériences les plus amusantes qu’il m’ait été donné de faire jusque là. Merci à Fabien pour son aide dans cette réalisation, et pour les vidéos qu’il prenait pendant que je gérais les branchements L’idée consiste à produire un arc électrique, puis à le moduler en fonction d’un musique, de façon à ce que l’éclair reproduise le son correspondant.
DIY Planet : Made in Fr - page 4
A real time clock is basically just like a watch - it runs on a battery and keeps time for you even when there is a power outage! Using an RTC, you can keep track of long timelines, even if you reprogram your microcontroller or disconnect it from USB or a power plug. Most microcontrollers, including the Arduino, have a built-in timekeeper called millis() and there are also timers built into the chip that can keep track of longer time periods like minutes or days. So why would you want to have a seperate RTC chip? Well, the biggest reason is that millis() only keeps track of time since the Arduino was last powered - . That means that when the power is turned on, the millisecond timer is set back to 0.
DS1307 RTC tutorial
Review – Texas Instruments TLC5940 16-channel LED driver IC « t r o n i x s t u f f
Hello readers Today we are going to examine the Texas Instruments TLC5940 16-channel LED driver IC. My reason for doing this is to demonstrate another, easier way of driving many LEDs as well as LED display modules that are common-anode .
Ces circuits sont le plus souvent formés de bascules synchrones reliées l'une à la suite de l'autre et commandées par le même signal d'horloge. Pour comprendre le fonctionnement des registres à décalage, en particulier le registre à entrée série et sortie série, nous allons prendre en considération le circuit très simple de la figure 1. Nous déduisons, en observant cette figure, que la LED s'allume si l'interrupteur est commuté vers le haut, ce qui fait conduire le transistor. Par contre, la LED est éteinte si l'interrupteur est commuté vers le bas ce qui bloque le transistor. Ainsi, la LED suit fidèlement et immédiatement les commandes provenant de l'interrupteur ; chaque ouverture ou fermeture de celui-ci produit un effet instantané sur l'état de la LED .
