A Refrence voltage is really a tightly controlled 5v power supply voltage. Effective a 5v refrence circuit is a power supply tbus that can be shared across several sensors.
A bias voltage circuit passes through a very high ressistance to check circuit continuity and ressistance. As the circuit is very high resistance a bias voltage cannot supply power.
It works in a similar way to measuring ressistance with multimeter the current involved is so tiny it is insignificant
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
Last edit: 4 years 10 months ago by Andy.MacFadyen.
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