Simple IrDA Transmitter

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< PIC Project ~ Simple IrDA Transmitter

eric

Posted: Sun Aug 27, 2006 11:01 am Post subject: Simple IrDA Transmitter

Site Admin Joined: 01 Jan 1970 Posts: 311

B. Kainka
Communication over the
IrDA port uses a relatively
complex protocol but its
possible to send a single
character using just a few
components. In many
cases this will be sufficient
to control a Palmtop.
This circuit generates a single pulse of IR light that is interpreted
by the Palmtop as a data byte with the value 255. The
circuit could hardly be simpler, a 1 μF capacitor is charged via
the 27 kΩ resistor and when the switch is pressed this charge
will flow through the diode to generate an IR light pulse. The
values have been optimised for a communication speed of
9600 Baud but the actual pulse

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