==== Multivibrator mod ====

{{:projects:velleman_kit.jpg?480|Boring non-awesome stock kit}}

Got hold of a Velleman kit for a Flashing LED set.
The kit is essentially an astable multivibrator.

The kit in it self is simple, and a great way for me to learn basic soldering and so on.
But the kit lacks in way of usability, and I have a science project coming up with soundwaves. So it would be a great way to show some basic frequency changes in sound and how it affects the audible sound.

First of all, the diodes blink at a very slow rate. This frequency is far beyond the humans perception range. The problem is easily solved with two new 100n capacitors instead of the standard 10u which allow for a much higher frequency range for the two trimmers.

Schematics:

{{:projects:velleman_mod_schematic.jpg?480|Road to awesomeness}}

Finished product:

{{:projects:finished_velleman_mod.jpg?480|Talk about recycling}}