Battery Powered 433 MHz  Tracking  Transmitter  (LPD frequency range)

This small PCB  delivers a tracking signal which can be received by
a readily available LPD receiver.  A MSP430F1232 controls the Hope RFM02 transmitter module. Three beep in FM with a duration
of together around  1 second can be received after a selectable time . Between the three beeps, the whole system turns in power down mode and consumes  just around 50 uA.

      

    (click to the pictures)

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Features:

Size : 20mm x 48mm

RF range : 4 channels      433.400    MHz    LPD CH 14                 433.800   MHz    LPD CH 30                 434.200   MHz    LPD CH 46                 434.650   MHz    LPD CH 64

Power range : 4 levels       - 13   dBm                                          -  7   dBm                                             1   dBm                                             3   dBm  ( with optimal environment)

Repeat Time for Beep: 4 selectable delay times                                         10   seconds       1.550 mA/h                                         30   seconds       0.175 mA/h                                         60   seconds       0.113 mA/h                                         120 seconds       0.082 mA/h

Transmit Time :               less than a second

Power consumption :         Power down mode    :      50 uA                                         Transmitter active    :      25 mA ( full power setting)

Voltage :                          3.7 V cell phone accumulator and/or                                         3.5 .. 5.4 V external power.                                        Automatic switch over.

One may download the C code for the MSP430F1232 here.  (5K zipped)

Look at the schematic here. (pdf)
The assembly drawing of the PCB can be found here. (pdf)

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