One of the modules that are used to work with high voltages, is the Relay. On the front it has three ports: NO, COM and NC. It works like a regular switch: when triggered, it closes the connection with the NO (Normally Opened) and opens the one with the NC (Normally Closed). For example, if we connect two wires, one on the NO and one on the COM, they’re not connected until we give the .on() command to the relay. If we put them on COM and NC, they are always connected until the .on() command is given.
Imagine a single chip able to interface with your Ethernet, USB, and serial devices, turn those connections into wireless radio signals with miles of range, able operate off a single AA battery, and costs less than $2.
Always Innovating is working on a tiny flying video camera called the MeCam. The camera is designed to follow you around and stream live video to your smartphone, allowing you to upload videos to YouTube, Facebook, or other sites.
Containing an entire childhood universe of small pieces and coloured wires, the Arduino Starter Kit contains everything needed to enter a fantastic world where things speak to each other, empowering its users with robotic literacy.
Welcome to the eighth instalment of Dive Into JeeNodes. Let’s install Node.js!
Now that the basic Wireless Sensor Network is up and running, it’s time to start thinking about the server-side software, which in this series will be HouseMon. For that, we need to get three pieces of software up and running on the RPi: Node.js, Redis, and git.
En este tutorial se va a explicar cómo montar nuestro propio VU meter, o vúmetro. Un vúmetro es un indicador de volumen. El VU es la unidad de volumen. En este proyecto, mostraremos en una línea de 10 LEDs el sonido percibido por un micrófono.
A friend has a Kenwood TS-520S HF (high frequency) ham radio. He does not have the optional DG-5 frequency display and calibrating the dials between bands is not much fun. He gave me some information about the DG-5 and through some review I believe I can make a substitute for the DG-5 using an Arduino, LCD Shield and hand full of chips
I was looking for a nice enclosure to host my latest project (an Arduino baased data logging thermometer with multiple sensors) and, once again, I came to an Ikea product, a RIBBA photo frame that has enought space to host my project circuitry:
Welcome to the seventh instalment of Dive Into JeeNodes. Hello RPi, meet the JeeLink!
With all the RPi setup out of the way, it’s time to hook it up to the hardware. Fortunately, most of the essential ingredients are already included in the RPi. The JeeLink is based on an FTDI chip, for which the driver will be auto-loaded by Linux when it’s plugged in.
This Space Invaders game does more with less. [Rjk79] managed to make a video game using a two-line character display. The game consists of a wave of invaders on the top line, with the defender cannon on the bottom.
[Fabio Varesano's] new Arduino compatible board packs a full power punch in a ultra compact layout, measuring at 20.7x15.2 mm, the Femtoduino is probably the smallest 328 based Arduino compatible board around.