After many delays, restarts, and years, [Vince ] has finally finished his Super VMW CPU Meter. Featuring six alphanumeric red led displays, two 10 segment bar graphs, twelve red LEDs, and six color LEDs its got plenty of “screen” space to show all sorts of useful information.
Electrically its driven by four SAA1064 LED driver chips attached to an i2c bus which is banged by a PC’s parallel port and driven by software in linux. The software allows you to build displays for what ever application you may want, and even includes a color ASCII output so you can see what it will look like before you even have hardware.
Four examples are given, one is a cpu meter which uses the bar graph displays to show load per core. Another uses the bar graphs as a VU meter for your music while displaying the song’s information. There is a clock in all the normal formats + UNIX time, and some scrolling text demos.
Construction gets a little odd as overhang of chips and connectors was not really taken into account so some “lofting” was needed to raise the trouble spots above the rest of the board. It is not something we would want to do, but a handy trick if we are ever faced with that situation.
Join us after the break to see this wild light show in action. [Read more...]