digital timed potentiometer

golf nut · #1 03-31-2009, 05:05 AM

you could likely do it mechanically with the hour hand of a clock that move the pots very slowly from off to on and then in reverse, it would be a fun DIY.

eli@fijireefrock.com · #2 03-31-2009, 05:11 AM

i suppose you could it wouldnt be fun it wouldnt be digital.
i want it to be as compact as possible

banditpowdercoat · #3 03-31-2009, 02:39 PM

Would it work to use a transistor, With say a R/C circuit on the gate? use a Pot to vary the charge time of the capacitor. And the charge voltage of the cap determines the gate signal of the Transistor? maybe a Mosfet instead of transistor? It's been to long since I fooled with electronics. Mostly 600-4160V now I play with

Edit, I found a site with a WHACKLOAD of different schematics

http://ourworld.compuserve.com/homep...epage.htm#menu

I'm looking at the Fading red eyes one right now.

Ohhhh, check out the

Automobile Interior Lights Fader

golf nut · #4 03-31-2009, 09:29 PM

It sounds like you should go directly to a PLC,real time. you have a number of things that you want to automate, why not take the plunge.

banditpowdercoat · #5 03-31-2009, 10:07 PM

Quote:

Originally Posted by Mr OM

It sounds like you should go directly to a PLC,real time. you have a number of things that you want to automate, why not take the plunge.

I am going PLC eventualy on one of my tanks. I have a couple Siemens Logo's here, and a AB SLC5 I want to use the SLC, but finding software that I can use, cost effectively, is proving harder. I use RSLogix all the time at work, but work is 1600Miles away from home. Slight changes and tweaks would be difficult