Page 78 - PDA Robotics Using Your Personal Digital Assistant to Control Your Robot

PDA 05 5/30/03 11:35 AM Page 54

Figure 5.16 PDA Robotics
Transceiver package options.

Figure 5.16 shows the three packages available. PDA Robot is using
the side mount package (TFDS).
The transceiver conveniently contains an amplifier, comparator, drivers,
ACG logic, the IRED, and receiver, as seen Figure 7.17.

Figure 5.18 shows the recommended circuit to use with the transceiv-
er. The outlined components described as optional have been includ-
ed in the design of PDA Robot. The capacitor is used to clean up any
noise normally caused by the power supply. The noise being sup-
pressed comes mostly from the two DC motors used in this project.
The capacitors on the motor control circuit and those tied to the
MCP2150 and TFDS4500 are used for logic circuit noise suppression.

The only required components for designing an IrDA 1.2 compatible
design using Telefunken SIR transceivers are a current limiting resis-

Figure 5.17
Transceiver block diagram.

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