Propeller clocks are nothing new to anyone who has been into electronics for a while. They use an idea called POV, Persistence Of Vision, which means that if something appears in the same spot consistently, at least 50-60 times per second, our brains think that it’s permanently there when it really is not. TV’s and Monitors use this method of display, so it’s not as uncommon as you might think.
After having seen so many propeller clock POV videos on Youtube, but no real description of how they work or how to build your own, I set out to make one and document how it was built. The Pyro Propeller Clock POV design criteria was short and sweet: be as simple as possible in order to encourage others to make their own, DIY style.
Pyro Propeller Clock POV – [Link]
This project creates a RGB LED lit love heart which is controlled by a PIC12F683 microcontroller. I designed the project as a gift for my wife on our 15th wedding anniversary (since she puts up with my addiction to electronics I thought she deserved something in return!).
RGB LED Love Heart – [Link]
Step by step instructions for how to build and implement the replacement surgical lamp bulb system using an LED circuit developed by Mohammed Shafir and Zoe Englander as part of the course BME 262-Design for the Developing World at the Pratt School of Engineering, Duke University.
Replacement for surgical lamp bulbs using LED circuit – [Link]
In this project it was used the “Piranha Super-flux RGB” Led of common anode, and the PIC18F25K20, in order to generate combinations of colors. It has two function modes, automatic that generate the color sequence that is stored in the μC memory, and the manual mode in which you can select one of the seven possible colors.
Super Flux RGB LED Controller – [Link]
plastibots.com writes: [via]
I’ve been involved in microcontrollers for some time – but of the LEGO Mindstorms flavour (and BASIC Stamp to a lesser extent). Lately, I’ve jumped on the Arduino bandwagon. I’ve always had the natural nack to fix pretty much anything that has batteries or a plug running out of it. As the Arduino revolution has picked up dramatically over the past few years, so to has my desire to do DIY projects around the house. At some point in the future, we plan a kitchen reno. Part of that reno will the addition of under-cabinet LED lighting. Since that is far off, but I also had the need for better lighting in my office, I figured this would be a great time to proto something for the kitchen upgrade, while making something functional for the office. So, here it is..
Dual LED Desk Light Controller – [Link]
Multiplexing is the most common technique for interfacing multiple seven segment LED displays to microcontrollers. Read this experimental tutorial to find out how this technique works.
Multiplexing Seven Segment LED Displays – [Link]
Citizen Electronics Co., Ltd. recently reported having developed the LMC10B series of LED lighting modules with built-in AC drive circuits using innovative circuit technology.
LEDs are usually driven by DC (direct current) power supply. Where an AC (alternating current) power supply is used, a DC converter circuit is needed. Issues to be resolved with DC power driven LEDs include the complexity of the circuit increasing the number of components, and electrical noise generated. [via]
AC powered 22 watts 1000 lumen LED module – [Link]
Last year in one of my classes we were required to make an ‘artefact’ or something that reflects the interests of the class. Most people make posters and the past two quarters that’s what my class did too. Posters however are static, usually boring, and don’t reflect that fact that everyone in the class is an EE major. We decided posters are for noobs and decided to go off the wall a little and make an LED matrix display. Lucky one of my friends John Wathen already had this beautiful 16×24 Green SMD LED matrix that he built back in high school.
16×24 LED Matrix – [Link]