Electronics > Beginners

Fun projects

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jose347:
So you own a power supply, an oscilloscope and a function generator. Whats next?
what are you suggestion for fun and simple projects to start the ball rolling?

jose347:
I'll start for the shy people, I think an oscillator is a cool and simple project to make, making an AC signal out of DC and be able to look at it from the oscilloscope is gratifying.

ledtester:
Measure the resonant frequency and quality of a LC-tank circuit using the ring-down method:

http://www.giangrandi.ch/electronics/ringdownq/ringdownq.shtml

And's here's a video:

bob91343:
If your generator is stable enough and can be micro-adjusted in frequency, you might try to find resonant frequency of a crystal.  I did that with a rather large batch of crystals and was disappointed in how inaccurately they were marked.

A crystal has two resonances, you hope, and they are very close in frequency.  One is parallel and is sensitive to circuit loading.  The other is series and is probably a better check.

Many of the crystals I tested had multiple resonances, some dangerously close to marked frequency.  They are probably products of sloppy manufacturing but since I never manufactured one I don't really know.

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