led Archives - Page 26 of 59 - Projects Tutorials Code Library for Atmels Atmega32 AVR

SecureLED: Better Access Control Using ATMega32

Introduction Overview SecureLED is an optical access control device which replaces current RFID or Magnetic Strip technologies with a cryptographically secure, contact-less device which communicates over commodity Light Emitting Diodes (LEDs). Project Summary This project started with one central premise: current physical access control systems are insecure in fundamental ways. We sought a way to […]

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Programmable remote control Using Atmega32

Sensor - Transducer - Detector Projects / Ibrar Ayyub

Introduction The goal of our project was to develop a remote control whose buttons would be readily programmable by recording the signal from another remote control. After revising several standards on infrared signals, we determined that the approach to take was to record the signal by determining the width of the transitions in the waveform,

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Pong2 Using Atmel Mega32

Introduction PONG, a video game that simulates a game of Ping-Pong between two players, has a long and pervasive history, and is said to be the first video game ever created. For our final project, we decided to pursue PONG with a twist. We designed and constructed a dual player mode, two-dimensional PONG unit. This

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DIY Digital Wristwatch

Electronics News Updates / Ibrar Ayyub

Introduction The main incentive behind this project was to see how much I could cram, in terms of both hardware and software, into a wristwatch-like device that is no larger than the display itself. An OLED display was chosen for being only 1.5mm thick and not requiring a backlight (each pixel produces its own light),

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Lithium-Ion Battery Recycling Made Easy

Electronics News Updates / Ibrar Ayyub

Introduction It can be quite tricky to reuse lithium-ion batteries from discarded equipment since these cells are often charged inside the equipment. In other words, there is no separate charger that can be reused. Fortunately, it turns out to be fairly easy to build a charger for used (or new) lithium-ion cells. Like most people,

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New STM32F4 discovery board features TFT LCD

Electronics News Updates / Ibrar Ayyub

The STM32F429 Discovery helps you to discover the high-performance microcontrollers of the STM32 F4 series and to develop your applications easily. It offers everything required for beginners and experienced users to get started quickly. Based on the STM32F429ZIT6, it includes an ST-LINK/V2 embedded debug tool, a 2.4″ QVGA TFT LCD, an external SDRAM of 64

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Wago 2060 terminal blocks don´t overtop LEDs

Electronics News Updates / Ibrar Ayyub

With a height of only 4.5 mm are new terminal blocks able to connect LED modules and LED panels aesthetically and with a maximal reliability. There are numerous SMT connectors on the market, which are suitable for usage on LED panels but even in other applications. That´s why it´s a logic question – why just

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Hacking a cheap LED voltmeter

Electronics News Updates / Ibrar Ayyub

I’m planning to build a EEVblog-ish constant dummy load for battery and power supply testing. Dave in his build used a LCD voltmeter for the display. In the senseless pursuit of difference, I tried other display solutions including character LCD, graphics LCD, OLED, TFT, AMOLED, IPS, which resulted in several previous blogs but nothing ends up

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Small but powerful LED series KP- 2012

Electronics News Updates / Ibrar Ayyub

Don´t let yourself get confused by miniature dimensions – small SMT LEDs produce surprisingly strong light. SMT LEDs enjoy a big popularity because of their size but also thanks to a fast and simple assembly to PCB on automatic machines. In comparison to wire-leaded types, a vast majority of SMT LEDs doesn´t contain optics, thus

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High-voltage seven segment LED display driver with SPI interface

Electronics News Updates / Ibrar Ayyub

Seven segment LED displays are known to be resource and power hungry. But because they are visually so charming and readable from a far viewing distance and at a much wider viewing angle as compared to any other electronic displays, they are still hugely popular. The required number of I/O pins to drive the LED

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