Timed fades circuit for stage lighting desk - Electronic Circuits Projects Diagrams Free

cpnick · 18th February 2004, 08:47 PM

I’m building a stage lighting desk for an amateur dramatics group and need a timed fade-up and timed fade-down circuit to achieve the following:
-adjustable timed fade up from 0 to 10v over 0 to 10 minutes, initiated by rapid fade up of a slider pot
-adjustable timed fade down from 10 to 0v over 0 to 10 minutes, initiated by rapid fade down of a slider pot

Can anyone help please?

Russlk · 18th February 2004, 10:28 PM

This circuit should work. When the slider is at the center, the time is very long, it may be dificult to determing a setting for 10 minutes. zero to 10 minutes is an infinite ratio, so that is not possible. The minimum time is about 50 milliseconds.

cpnick · 18th February 2004, 10:46 PM

Russell

Many thanks for the circuit. I will email separately futher comments.

CPnick

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18th February 2004, 08:47 PM	#1
cpnick	Timed fades circuit for stage lighting desk I’m building a stage lighting desk for an amateur dramatics group and need a timed fade-up and timed fade-down circuit to achieve the following: -adjustable timed fade up from 0 to 10v over 0 to 10 minutes, initiated by rapid fade up of a slider pot -adjustable timed fade down from 10 to 0v over 0 to 10 minutes, initiated by rapid fade down of a slider pot Can anyone help please?

18th February 2004, 10:28 PM	#2
Russlk	This circuit should work. When the slider is at the center, the time is very long, it may be dificult to determing a setting for 10 minutes. zero to 10 minutes is an infinite ratio, so that is not possible. The minimum time is about 50 milliseconds. Attached Thumbnails __________________ see my website: www.geocities.com/russlk

18th February 2004, 10:46 PM	#3
cpnick	Timed fader Russell Many thanks for the circuit. I will email separately futher comments. CPnick