This RGB based LED ring is the second version of a project which has three LED driver chips which enhance the brightness of the color lights. I found the second version more appealing than its ancestor when I watched the video. The first version used only one LED driver IC which was less attractive than this one. If you want to give this cool RGB based LED ring a
Windell H. Oskay from EMSL created a detailed discussion on using Zener Diodes. He has designed a circuit flow using Zener diodes to control the reverse breakdown while designing up a circuit which is impossible to do if he would had used a regular diode. “Zener diodes are a special type of semiconductor diode– devices that allow current to flow in one direction only –that also allow current to flow
Our friend Pete Mills developed this great ATTiny based Electronic Candle, we have seen electronic candles before but what makes this one shine is how the flickering was done. Pete actually sampled the actual flicker patterns of a real candle flame so that this reproduced flame would look as close to the real thing as possible. You can see some other electronic candle designs here for inspiration. “The ATTiny
kayumba2 posted an informative video demonstration that guide you to insert Micro-USB and HDMI together. You need to cut with thin knife HDMI cable and clip it together.
Todd Harrison from ToddFun has experimented fixing a timer control which he was using to turn on and off the Christmas lights after a certain span of time. With a soldering iron and a bit of troubleshooting we learn what the problem is. Turns out that a part is needed to permanently repair the unit but when Todd has the new part the fix should only take another 5
Checkout this cell Jammer or we can say Dirty transmitter. A Dirty transmitter transmits junk within the cellular phone bands. This model is good enough to knock out pesky cell phones for about 10 to 15 feet, just perfect for a quite cup of coffee in your favorite coffee shop. Via : EEweb “The 555 timer [8 pin] IC simply makes a noise. It’s coupled via C4 [electrolytic] to modulate
 Thanks to Mike for sending in his German Word Clock. He has used some SPI controlled RGB lighting strips to make wiring and controlling the lights simpler. So that the letters look good he has built and installed an MDF baffle with 100 light holes in it.  “To control the clock, an ATmega8535 is used. This is a real-time clock (DS1307), a Bluetooth module and a Darlington array
