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Recent content by motleypixel

  1. M

    LED signal to open 7VDC CKT?

    Yes, the ckt I provided in my OP uses an opto-coupler. I plan to stay with a 7.4VDC P/S.
  2. M

    LED signal to open 7VDC CKT?

    Thanks godfreyl! Just a quick summary of what happens when I use this system. The usual total time I use the system is about 1-2 hours, never more than 2 hours. The system starts usually at 40ms shutter open and generally ends up at shutter open for about 20 seconds. The number of shots...
  3. M

    LED signal to open 7VDC CKT?

    Okay skydiverc, looks interesting. I'm attaching a copy of it with some scribbles on it. So what would the wiring look like connected to my system, as I did with my attachment above with the CKT I'm working with and how it wires up to my little bramper and the motor system? So with the design...
  4. M

    LED signal to open 7VDC CKT?

    Would like to see a working schematic :) Yep, for time-lapse photography, those 1200 shots would produce a 40 second video clip at 30fps. Yep and I frankly haven't had any test runs, but my thinking is that it will basically give a slowing movement effect of the time-lapse...for the...
  5. M

    LED signal to open 7VDC CKT?

    Sounds good, a schematic would be nice. I'm working towards the design in the attached file (both wiring and schematic) it uses an opto-coupler and a relay, what do you think of this design? I figure about a 4ms response time for the ckt to cut power. I would like to speed this up if possible...
  6. M

    LED signal to open 7VDC CKT?

    This is going to be tough going solo, I just haven't the experience. I suppose I could use a voltage comparator like this? **broken link removed** Again, my signal is ~ 3.5VDC with a varying period of 40ms to 30,000ms. When I have a positive 3VDC I want to open my 7VDC PS to my speed...
  7. M

    LED signal to open 7VDC CKT?

    Thanks guys for the input. Focusing on the motor and gearbox and the interrupt of power...this particular system is VERY tolerant of this...I should post a video. The DC motor is a 1rpm motor (3-12VDC) and I feed it a pwm signal at ~7VDC (2-cell lipo). The worm and gear mesh is tight and I've...
  8. M

    What are some alternatives to Lithium-Ion batteries?

    Well I guess the good news is that you are probably not working with meth lab processes :) I think the small number of cases of lithium-ion fires in the past have painted this picture. You will be safe so long as you follow very simple guidelines. Today's lithium chemistry is much better that...
  9. M

    LED signal to open 7VDC CKT?

    Hello everyone, Pretty cool how the new post title generates a possible "search" for the user...nice forum module to implement. I've lurked here the past two days, so I've read a bit and feel I needed to register to get some dialog going on this project. First post, looking forward to...

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