On Fri, 14 Jun 2002, Vasile Surducan wrote:

>someone said:
>
>> > to set the A port to digital output.  Now, however, when I put the pic
>> > in the circuit, it flashes the LED at about 950 MHz! I also tried the
>>
>  Maybe when people have too good scopes they could tell foolish things ?
>:-0     I always want to flash a LED at 1GHz... The viewers eyes are
>delighted to see such a miracle... You must do a picture to remember that
>after 20 years.  And before telling someone, read more carefully the
>electric specifications of your PIC datasheet.
>Maybe the Microchip team will hire you for the next 1GHz PIC design.

You can 'flash' a LED or laser diode at 2.4GHz using a microwave oven as
exciter. solder a fast antiparallel diode to it, the legs are long enough
to work as probes, and put in oven with 1/2 glass of water as load.

I don't know how to detect the modulation though. There is a good chance
that the devices will burn out if the legs are too long. ;-) Put some rice
or salt grains into the water to provide nucleation centers ...

Peter

PS: There should be a strong 50Hz AM component in the light, this could be
heard with a normal 'light receiver' amplifier.

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