Hackaday: A Simple Science Fair AM Transmitter
Looking for a neat wireless demonstration for your next science fair or STEM event? Over on Hackaday they’re highlighting this AM transmitter demo which seems like a great idea, check it out:
A Simple Science Fair AM Transmitter by Al Williams
https://hackaday.com/2020/01/23/a-simple-science-fair-am-transmitter/ (sourced and republished from RSS feeds)
A crystal radio is a common enough science fair project, but the problem is, there isn’t much on anymore. The answer is, of course, obvious: build your own AM transmitter, too. AM modulation isn’t that hard to do and [Science Buddies] has plans for how to build one with a canned oscillator and an audio transformer.
We don’t imagine the quality of this would be so good, but for a kid’s science project it might be worth a shot. Maybe something like “What kind of materials block radio waves?” would be a good project statement.
The site is aimed more at kids and has a good list of materials (mostly from Jameco). They do credit a site that has a more detailed explanation of how the thing works, though. Both sites have a lot of other projects that would be suitable for a young hacker’s science project…https://hackaday.com/2020/01/23/a-simple-science-fair-am-transmitter/