I made a pair glasses with LED Matrices on the lenses which I'll be using at music events or clubs. Also as practice for another future LED Matrix project I am currently planning (Custom LED Taillights for '78 Nova).
I chose to use a PicAxe because it seemed like the easiest microcontroller to jump into and hit the ground running. The programming circuit consists of just 2 resistors and a stereo jack. The programming language is a type of BASIC so it's very simple to learn and use (Although the over-simplified language means that sometimes you have to get creative to perform some tasks that would be more straightforward using C)
I used the 20X2 model because since space is limited, I wanted to avoid using LED driver chips; the 20X2 has 1 input, 1 output and 15 configurable pins that can be configured as either input or output. The glasses have a 5X5 led for each lens that I wired as one horizontal 5X10 Matrix and therefore required 15 output pins.
***UPDATE*** VIDEO ADDED ***
Remove these ads by
Signing Up































Visit Our Store »
Go Pro Today »




The LEDs don't shine too bright out the back side, but I might black out the backs with a sharpie to see if it helps me to see better, because it is definitely easier to see through the lenses with the LEDs off.
all the best!
To be honest I probably made some mistakes when documenting the build. I should probably add more remarks to the code as well.. Sometime I get lost in that code myself!
What exactly is the problem?
Is it scrolling from right to left?
Or is it scrolling correctly but with the last letter first?
Press button1 for Knight Rider
Press button2 for "DANCE"
Press button3 for something else
btw,rocking project
cheers
I want to keep the parts count for this project low because it barely all fits inside the glasses as is; so don't want to add any more ICs to it. Truth is the actual program memory is barely used so I'll probably just write more subroutines to stand in for the eeprom..
one suggestion - use coin type batteries - lighter smaller more $ but would seem better for this.
I always burn myself with hot glue, and I don't find it to hold all that well. Plus the cobwebs are super annoying!
I'm going to have to give epoxies and rubber cement another chance. I wonder if there is a table of pros and cons for common adhesives that you could use for different projects..
regards
Andy