Barboza Space Center Electrical Engineering on Mars: ” How can I make make the world’s easiest radio?
Make a Radio
How to make the world’s easiest Radio ! Do it yourself at home!
364,289 viewsFeb 2, 2021
#RomanUrsu #Radio #Simple #DIY #Physics
In today’s video, I will show you great ideas on how you can do it yourself at home The simplest radio emitter AND receiver. This is the simplest example for children about how radio waves transmit signals.
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284 Comment
In the 1960s elementary schools a lot of your builds were common practice during science class, this built a hands on science foundation in many young Americans. It’s sad to see that today’s young students don’t receive science hands on like it was done in the 1960s.
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Using a piezoelectric element from a lighter in this way, is actually making a VERY primitive form of early transmitter referred to as a “Spark Gap Generator”. This device can not generate a signal that can actually send any form of data, except maybe super basic yes and no’s, such as one click for yes and two for no. Morse code can not be sent this way. If a continuous spark could be made, you could then send a short of long spark in order to send Morse code. Also the LED needs to be REALLY close to “hear” the spark gap signal in order to light the LED. using a capacitor, crystal diode, possibly a coil, as well as a crystal earphone would allow you to hear clicks much farther away as long as you were not accidentally tuned to a strong radio signal. Spark Gap Generator are very very short ranged, until tune transmitters and receivers were invented signals could not be sent further along. Spark Gap Generators also are NO GOOD during lightening storms. Lightening can be received by receivers designed to receive spark gap signals. If you turn on an AM radio, and tune it to an unused (empty) frequency, you can hear clicks cause by this spark gap generator. Spark Gap Generators transmit basically on all frequencies since it is not tuned to a particular frequency. FM signals are generally not affected by spark gap interference such as caused such a transmitted and therefore can not receive such a signal. AM radios also receive lightening as a signal and therefore lightening can be heard miles away from a storm by turning into a radio station affected by a nearby storm, or simply being close enough to receive the signal generated by the storm itself. Lightening could be considered nature’s spark gap generator. Read more
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