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MCM Electronics Daily Deal and Bulk Bargain

Building a 8 Channel Solid State Relay Board

Posted December 19, 2014 by Chris

"Have you ever seen videos of those insane Christmas light displays? Those displays are usually controlled by large banks of solid state relays turning on and off each strand to time with the music. I bought a bunch of these relays on eBay and wanted to make my own general purpose controller that I could use in other projects."

Christmas Lights With Individual LED Control

Posted December 18, 2014 by Chris

"I wanted to create a truly personalized one without ruin me either. Two ideas immediately came: a microprocessor to control all the lights, but at the cost of a relatively large strand wire, even though the use of crossing wire and diodes, can reduce the number of son, this is not very satisfactory and place a microprocessor per lamp, but until the price of each processor exploded the price of the most basic garlands."

ENC28J60 and Arduino

Posted December 18, 2014 by Chris

"Today’s tutorial is a bit different: I’m going to show you how to make your ethernet shield wireless! You can find many Wi-fi shields for Arduino: starting from the official one, up to shields based on Microchip’s ICs. Sometimes however it could be easier to connect an Arduino to the Wi-fi network using your ethernet shield in conjunction with a wireless router."

The Music Math Art and Science Electronic Book

Posted December 15, 2014 by Chris

"The Music,Math,Art and Science Electronic Book contains 4 pages that treat subjects like Music, Maths, Arts and Science and I thought it to be an inspiring introduction to the first year of Primary School that my niece will start this September. The book contains movable parts and uses the electrical capacitance of the human body to activate sounds and lights and other sensors."

Ultra Low Cost 2.4 GHz Wireless Transceiver with an FRDM Board

Posted December 14, 2014 by Chris

"For my embedded systems lecture I need a wireless connection to the robot we will develop during that course….Alex Vecchio pointed me to a $2.75 (!) wireless module featuring the Nordic Semiconductor nRF24L01+. Exactly what I needed, with an incredible low price :-). So I ordered a handful modules, and after a few hours, I had two FRDM-KL25Z talking to each other:"

Homeopathic Radio Engineering

Posted December 13, 2014 by Chris

"A transmitter location on the east coast of the USA was used. The tests were conducted on HF radio frequencies on and around 6925 kHz, using a state of the art solid state transmitter with a standard off the shelf MOSFET as the RF final amp. Each monitoring post was equipped with the highest quality HF receiving gear and highly sensitive monopole receiving antennas….The results of the experiment clearly speak for themselves, as transmitter power went down, the signal strength went up."

High Voltage Keyboard

Posted December 12, 2014 by Chris

"This ‘musical keyboard’ uses flyback transformers to create an audio modulated high voltage arc discharge. Each key controls a driver board. When activated, the key applies power to a high voltage transformer. The transformer makes an arc, which is modulated at a set frequency. This frequency produces audio."

Christmas Lantern Synchronized with music

Posted December 11, 2014 by Chris

"The project was a 5 ft tall lantern composed merely of junk wires, light bulbs and considerable amount of electronic components. The lantern was synchronized with monotone tunes. There were 5 different songs used and every song has different light sequences."

The Ghost In The Field

Posted December 10, 2014 by Chris

" The camera has been fixed in its position and the reader photographed. Using a tag connected to an LED we paint in the edges of the readable volume with a long exposure and animate them to show the form."

Panda With A Gun On An LED Pixel Array

Posted December 9, 2014 by Chris

"Although the panda effect is in 3D, and 3D is usually hard, several visual limitations simplify the problem greatly. The panda is only seen from the side, and is rotated about its exact center. This means that if I can figure out how to render a side view of a single layer of panda voxels, I’ve come up with a solution for the whole effect."