Let's see how it all works...
This is where it starts getting tricky. We need to figure out which lead
goes to which LED. The tech specs for the integrated circuit (IC) used
in the alarm clock which was used for this project originally, might not
be the same kind used in the alarm clock you got. Please see the IC
manufacturer for a data sheet. The data sheet for the IC used in the
Denver brand alarm clock depicted in this article, is available here.
The Denver IC uses alternating current (AC), which creates two cycles
for the LED display to halve the amount of leads required for the LED
display setup. This means that the LED will effectively be blinking at
the same rate as the current alternates. Unfortunately, the alternating
current requirement for this IC, prevents us from using the internal 12
and/or 5V supply of power from the internal computer power supply.
Stupid! (If you have a solution to this problem email me!
