June 2024
Intermediate to advanced
280 pages
11h 5m
English
Content preview from Make: Radio
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20 Make: Radio
Because voltage is always relative, and only variations in current get
transferred from the transmitter to the receiver. Therefore, the signal from
the coil in the ferrite rod fluctuates around 0V.
Now, what would you hear if the diode wasn’t in the circuit? Nothing! You
can test this yourself by shorting out the diode with a piece of wire between
screws D and E in Figure 1-27.
The diaphragm in the earphone cannot vibrate at the carrier frequency. The
oscillations are much too fast—and even if the earphone could reproduce
them, they are too fast for your ear to resolve them as sound. Moreover, the
oscillations are equally positiv ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.