The original SIR code and schematics were obtained from here with the kind permission of their author, John DuBois.
A schematic (HP laserjet format) for the serial IR transmitter. and a parts list.
A schematic (HP laserjet format) for the serial IR receiver and a parts list.
Artwork for the irDaemon serial port controllers in PCBCAD format.
The software for ird and friends is part of the basic RcDaemon package.
You can reach me: smp@csn.net