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Last Updated on: Thursday, April 07, 2016 02:04 PM

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Potentiometer Circuits

10 Turn Pot Forms Frequency Readout  -  Letís say you are designing a signal generator for a test fixture. To adjust the frequency you would like to use a ten turn pot with a nice dial mechanism attached as a frequency display. However, a display range of 0 to 9.99 would be impractical since . . . [Hobby Circuit designed by Dave Johnson P.E.,  01/27/08]


Control Variable LED Intensity  -  The circuit below uses power from four rechargeable AA NiMH cells to drive 3 white LEDs.  A potentiometer varies the duty cycle of a pulse width modulator circuit to vary the intensity of the LEDs from 0% to 100%.  The beauty of the circuit is that when the . . . [Hobby Circuit designed by David A. Johnson P.E.,  09/27/09]


Pot Controlled Variable LED Intensity Circuit  -  The circuit below uses power from four rechargeable AA NiMH cells to drive 3 white LEDs.  A potentiometer varies the duty cycle of a pulse width modulator circuit to vary the intensity of the LEDs from 0% to 100%.  The beauty of the circuit is that when the . . . [Circuit by David Johnson P.E.,  09/27/09]


Ten Turn Pot Forms Frequency Readout  -  Letís say you are designing a signal generator for a test fixture. To adjust the frequency you would like to use a ten turn pot with a nice dial mechanism attached as a frequency display. However, a display range of 0 to 9.99 would be impractical since . . . [Hobby Circuit designed by David A. Johnson P.E.,  01/27/08]


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