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| projects:vellemanmod [2011/06/19 03:52] – Jakob Schytz | projects:vellemanmod [2013/04/08 15:47] (current) – external edit 127.0.0.1 | ||
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| + | ==== Multivibrator mod ==== | ||
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| + | Got hold of a Velleman kit for a Flashing LED set. | ||
| + | The kit is essentially an astable multivibrator. | ||
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| + | 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. | ||
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| + | 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. | ||
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| + | Schematics: | ||
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| + | Finished product: | ||
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