Re: to design receiver n transmission circuit usin pin &
well ofcourse you can design that...but there are some problems associated witht this crude type of reciever system.
like sensitivity and range.
a simple way would be to keep the diode and led in vicinity and conntect a clock to input of led. (alongwith proper resistance values).
Then at the other side connect the output of PIN diode to a CE amplifier. which would finally drive yet another LED (or can store data in a register ).
I've tried this ...it works ...but my range was ...both of them touching each other.
But i guess you can find some more sensitive devices.
bye