The Icq HP project
That program aims to exchange objects and messages between two HP calculators or more, with a wire or with external radio modules of a range of about 35 meters. Sending and receiving objects is performed in multitasking.
The project is complete.
The HP49G et HP48G/G+/GX versions resp. 1.1 and 1.0 are available :
Version 1.1 for HP49G :
Version 1.0 for HP48G/G+/GX :
Here are the pictures of the radio modules (pictures without antennas of 15 cm each) :
Of course, the modules are linked to the HP with a proper HP-PC wire.
To build them yourself, here is the typon of the circuit.
You need, by module :
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