Hey I already posted the link Tr1000 and I found the Reference Design and Notes on how to build your circuit for it. I thought we could use the Reference design and design Radio Link for the Calculators. We could use the Reference design as the base, build a power circuit and amplifier, and add low power microcontroller like the PIC to interface it to the Calc so it can work with any Ti Calculator. Tell me What you think of the Idea.