Recently I’ve been working on a RFID identification solution for a new project at University of Aveiro. Our first approach will be through Arduino and the Son Micro SM130 RFID module. At first, the Arduino seemed quite simple and effective …
Category Archive: Electronics
Permanent link to this article: http://ricardo-dias.com/2012/03/17/sm130-rfid-reader-and-arduino/
Feb
25
DD-WRT Serial and Arduino
Today I’m sharing my latest experiment with DD-WRT along with Arduino. For those who are not familiar with DD-WRT, it is a custom firmware for a large range of different routers, that allows to unleash some features that they don’t …
Permanent link to this article: http://ricardo-dias.com/2011/02/25/dd-wrt-serial-and-arduino/
Mar
14
How to identify the polarity of a LED
Here I present 3 different ways to identify any LED’s polarity. I hope this is useful for people who are starting to work with LEDs.
Permanent link to this article: http://ricardo-dias.com/2010/03/14/how-to-identify-the-polarity-of-a-led/
Jul
22
Optical Reflection Sensor – TCRT5000
This is a 2 in 1. One Infra-Red emitter LED (wavelength around 950 nm) and a phototransistor just in one component. It detects reflections of objects in a range of 0.2 mm to 15 mm, has a filter to block natural light and …
Permanent link to this article: http://ricardo-dias.com/2009/07/22/optical-reflection-sensor-tcrt5000/