3 ms·
That's not the function of the crystal though, it is not optical but 100% electrical and serves to demodulate the signal, not to receive it.
by jacquesm 8mo ago
That's not the function of the crystal though, it is not optical but 100% electrical and serves to demodulate the signal, not to receive it.
- peter_retief 8mo agoThanks for that, I was partially aware of that, just made me think of crystal radios and how magical they are.
- jacquesm 8mo agoThey are magical! A radio powered by the transmitter, it's an incredible thing, really. The trick is that the diode is a very low forward drop one, typically Germanium, which has only 0.2V forward drop. But for more magic, you can also use a razor blade or a little bit of lead and then seek for naturally occurring diodes on the surface of the material. These can be even more sensitive than the Germanium ones.