Electronic Tether Project: Power Subsystem
Advisors: Dr. James Sennott and Dr. B. D. Huggins
The electronic tether project consists of an interrogator and transponder
unit which are both portable. The interrogator is powered by two AA batteries
and the transponder by two button cell batteries. The interrogator unit
consists of digital components including a microprocessor, two VCOs, and
RF equipment. These VC0s have an equivalent load of 167 ohms while operating
at 3 V and the microprocessor is 333 ohms at 5V. For this reason, there
are two DC to DC up converters on the interrogator which maintain constant
output until the input level drops beneath 1.6V. The transponder consists
of digital components and one VCO. One DC to DC converter is required for
the 3 V required by the VCO. The converters have low power indicators which
trigger an alarm when the input voltage falls beneath 2V.
[Home] [Contact us] [Curriculum] [Senior Projects] [Research] [People] [Links]
Copyright (c)1995-2013 Bradley University. All rights reserved.