Blog Archives
Posted on 09 Jun 2008
John writes:I read some articles on LED arrays. They described using arrays of 64 or more LEDs as crude oscilloscopes and other interesting things. I decided I’d make one myself - a really big array, 256 LEDs arranged as 16 columns by 16 rows. In 1983, while I was in my final semester of electronics classes at Monterey Peninsula College, I designed my array. I wanted a high-density array, in part to make the PC board smaller, but mainly to give a better appearance. [more]
Posted on 04 Jun 2008
TheOther1 writes:I bought a Sharp GP2Y0A21YK0F Distance Sensor to use in my robot. It was very easy to see the data returned in a serial console window, but I thought it would be cool to see the distance in zones represented by colors from a tricolor LED. Then you would not need to be connected to the computer to tell distance…[more]
Posted on 02 Jun 2008
This is a LED blinker based on PIC16F84A.The microcontroller blinks the 4 LEDs connected to PortB pins RB4-RB7. Once the pushbutton is pressed, the frequency of the flashes is toggled. This project is powered using two AA batteries.[more]
Posted on 01 Jun 2008
The Bob-clock is a wall-clock which uses 60 multi-color LEDs arranged in a circle to represent the small and big arm of an analog clock. If desired, it can also display the seconds with a third color. The image above shows the Bob-clock as it currently looks.The blue light signifies the hour-hand, while the red one is the minutes, so the image above the time is about 10 minutes to 4.[more]
Posted on 17 May 2008
This project implements an intelligent LED lamp controller that is used as a replacement for incandescent bulbs in a camper or recreational vehicle. The controller board plugs in in place of standard 1141 bayonet bulbs and uses less than 1/10th the power. This light provides numerous advantages over the traditional bulb especially for dry camping where every watt of power used is important. This project also makes an excellent emergency lamp when combined with a gell cell battery. This project has been prototyped and tested over the past year. I do not have circuit boards or kits for building this project but it is simple enough to be built on a breadboard. [more]
