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29 Aug 2010

This project shows how to build a LED circuit that is pulse fading – breathing like the “Macintosh” style LED fade off effect. The circuit is using plain electronic components like transistors, resistors and capacitors. To make LED fade on and off you just have to push a push button or trigger the input using square wave from a 555 timer IC. The producing effect is really nice. Find schematic and project details on the link below. [via]

Led throbbing – pulse fade without mcu – [Link]

28 Aug 2010

This project uses old fashioned LED displays to build a LED wristwatch that looks really cool. The heart of watch is PIC16F628A microcontroller and there is a separate oscillator to keep track of time. Check details on the link below.

LED Wristwatch - [Link]

27 Aug 2010

Austriamicrosystems has announced the AS1119 which is a compact dot matrix LED driver capable of driving 144 single leds via I²C compatible interface. For more information about this great part follow the link below.

144-channel dot matrix LED driver – [Link]

25 Aug 2010

Light Emitting Diodes more frequently known as LEDs are semiconductor devices that converts electricity in to light. It hard to find a gadget or other device that doesn’t use LED diodes. They are cheap they are simple to use and they are small. LEDs can emit different light colour depending on different chemical compound material in a semiconductor.

Driving LEDs – things everyone needs to know - [Link]

23 Aug 2010

This LED calculator will calculate the current limiting resistor value and rounds the resistance to closest standard 5% resistor value. To use this software you need to enable Javascript in your browser.

LED Calculator – [Link]

21 Aug 2010

This project is an automatic garden light using a LDR and 6V/5W solar panel. During daylight the internal rechargeable 6 Volt SLA battery is charging from the solar panel. When there is dark the battery is powering the white LED string.

Outdoor Garden Solar Lights - [Link]

20 Aug 2010

Kenneth Finnegan build a Bicolor LED clock based on MSP430. Project is developed using low cost Launchpad development platform from TEXAS Instruments. The MSP430 microcontroller is designed for low-power battery applications. The clock is controlled using a push button and a toggle switch. To display the time the LED is flashing in two different colors. Green flashes mean 10, yellow 5, and red 1, so the time 5:28 would be displayed as YELLOW [PAUSE] GREEN GREEN YELLOW RED RED RED (5:10+10+5+1+1+1) [via]

MSP430 Bicolor LED Clock – [Link]

9 Aug 2010

“John Boxall” design and build this clock that has no digits. It displays time by blinking each digit in different color using an RGB led. Clock is being run from an ATmega328 Microcontroller and a DS1307 Real Time Clock. Check design files and schematics in the link below. [via]

For example, if the time is 12:45, the clock will blink red 12 times, then show blue for a second (think of this as the colon on a digital clock) then blink four times in green (for forty minutes), then blink three times in red for the individual minutes. If there is a zero, blink blue quicklyl.

RGB LED Blink Clock – [Link]

4 Aug 2010

This project is a LED bike light build inside an Altoids tin box. It uses a 12xx series PIC to control the LEDs. Hardware schematics, PCB layout & software is all available.

Mint Tin Bike Light - [Link]

4 Aug 2010

This project shows how to build a LED flashlight using standard galvanized pipe. The LEDs are soldered on perforated circuit board and attached inside the pipe adapter. [via]

Gas pipe flashlight - [Link]





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