I need help in order to make a circuit which will do the following: Measure the time a voltage is applied (or switch is closed) and convert the time to an output voltage (linearly). Also measure the time when another switch is closed (or voltage applied in another circuit) and linearly convert this time to REDUCE the same output voltage. Is there an expert out there who can give me advice on how- to?
Thanks Lars
How about... Use a constant I source on a cap for increasing V with t. Use a constant I sink on the same cap for decreasing V with t.
D from BC
Over what sort of period? There are well-established techniques embodied in off-the-shelf time-to-voltage converters for microsecond to nanosecond time scales.
If the times involved are in the seconds to milliseconds range, a dumb microcontroller is a much cheaper solution.
-- Bill Sloman, Nijmegen
A gear motor and a 10 turn pot.
A PIC, of course.
digital up-down counter with an R network on the output's doing the DA?
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