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Thread: Opto triggering of ssg multicoil

  1. #11
    Hi All,
    Got it to work by powering an MJL21194 off the run batt and placing it between the IR output and the SSG trigger input.
    Darlington? kinda with the emitter of 1st going to base of 2nd and the collectors connected through the coil.
    The grounds of IR supply, 1st tranny, 2nd tranny and run batt are all tied.

    This was my first attemp after studying Gary Hammonds linked schematic.

    Havn't tried it on the multicoiler yet but it looks promising with one tranny.

    Thanks bro d
    Attached Images Attached Images
    Last edited by brodonh; 04-26-2015 at 10:04 PM.

  2. #12
    Quote Originally Posted by brodonh View Post
    Hi All,
    Got it to work by powering an MJL21194 off the run batt and placing it between the IR output and the SSG trigger input.
    Darlington? kinda with the emitter of 1st going to base of 2nd and the collectors connected through the coil.
    The grounds of IR supply, 1st tranny, 2nd tranny and run batt are all tied.

    This was my first attemp after studying Gary Hammonds linked schematic.

    Havn't tried it on the multicoiler yet but it looks promising with one tranny.

    Thanks bro d

    IR SSG TRIGGER.jpg
    thought you were using an opto-interrupter so I drew this up:
    opto interrupter.jpg

    As long as I drew it up...
    you can use the pnp to trigger 1 or many many more mjl21194/npn's.
    KR - Patrick

  3. #13
    Hi KR-Patrick,
    I appreciate your taking some time for this.
    You are talking about what I wanted to know and your drawing sounds perfect.
    Been having brain cramps. Please have mercy on me.
    I do not understand how to hook up the npn in your drawing.
    It seems that the base of the npn has to connect to the collector of the pnp in your drawing,
    but is the indicated battery the run batt for an ssg or suppy for the opto-interrupter or both. Is the coil the ssg coil.
    I've never used an opto interrupter so I suspect that the cap and R's are standard opto hookup.
    I'm sure it works as you say but unable to translate.

    If you have a little more help that would be great.

    Thanks,

    bro d

  4. #14
    Quote Originally Posted by brodonh View Post
    Hi All,
    Got it to work by powering an MJL21194 off the run batt and placing it between the IR output and the SSG trigger input.
    Darlington? kinda with the emitter of 1st going to base of 2nd and the collectors connected through the coil.
    The grounds of IR supply, 1st tranny, 2nd tranny and run batt are all tied.

    This was my first attemp after studying Gary Hammonds linked schematic.

    Havn't tried it on the multicoiler yet but it looks promising with one tranny.

    Thanks bro d

    IR SSG TRIGGER.jpg
    Hi All,

    Tried it with the multicoiler with 10 npn's and it was running 1000rpm faster than with the trigger winding at 24v input.
    npn's were slightly above room temp. Had to piddle with it a little for good results but it's functional and I'm grateful.

    Patrick knows what I want to know so hope to hear from him again about this.

    bro d

  5. #15
    Hi guys,

    I have been thinking of building a mechanical machine using the device below. I have already built a solid state using it and a cap dumper. The logic signal of my micro controller is enough to drive it so I know a little genny could do it as well.

    Why is this relevant to this conversation? It is an opto coupled FET package basically. look at the spec sheet and think of the possibilities for switching. I love these little things!

    Link:
    http://www.crydom.com/en/products/catalog/e_l_dc.pdf

  6. #16
    Quote Originally Posted by brodonh View Post
    Hi All,

    Tried it with the multicoiler with 10 npn's and it was running 1000rpm faster than with the trigger winding at 24v input.
    npn's were slightly above room temp. Had to piddle with it a little for good results but it's functional and I'm grateful.

    Patrick knows what I want to know so hope to hear from him again about this.

    bro d
    Hi Bro d,
    so check Gary's post 19 the hall is triggering 2 pnp's (interesting use of two...) which go on to trigger many NPN's - so for this opto/phototransistor do the same thing only picture 1 pnp instead of two.

    Again, your drawing does NOT picture a phototransistor, what are you using instead?

    That's some nice speed you're getting, how about the charging?
    once you start using other methods to trigger the "SSG" you now have to consider timing vs charging - yes :-)
    KR - Patrick

  7. #17
    Hi KR-Patrick,
    Did your chickens make it through the winter OK?
    Mine did but we had heavy snow covering up til 2 weeks ago.
    I put a heat lamp and water warmer in the coup with a thermal switch that goes on a 35degF. it was on for months.

    In my drawing D2 can be drawn like a photo transistor. I cut a timing wheel on my router that passes between them
    and the setup looks like a very large opto- interruptor.
    I used Gary's schemtic to work out my circuit for the 2 coil 10 pwr strand machine and now it's running a over 4000rpm at 24v.
    It's modeled after (gulp!) the dualpole which functions the same as ssg multicoil monopole. The rotors are 7"D. Charging looks promising.
    I'm able to adjust the timing so that it runs cool at top speed. 2.5A draw.

    I'm spent time comparing your drawing with Gary's before your last post and I'm still missing it.
    I was thinking that the two horizontal lines with a + sign above to the right was a bipolar cap.
    Now I suspect it's a batt. What is throwing me off is the unbroken line from the collector of the PNP around the right side of the drawing.
    Doesn't the base of the NPN have to be connected somewhere on the trace?
    I don't understand what you are showing according to your understanding.
    Are you showing an SSG coil and run batt along with the opto or just the opto cct?

    I've ordered some Opto interrupters and I've done Hall's with pnp's before so I'll get it eventually.

    Thanks bro d
    Last edited by brodonh; 04-24-2015 at 01:48 PM.

  8. #18
    Quote Originally Posted by brodonh View Post
    Hi KR-Patrick,
    Did your chickens make it through the winter OK?
    Mine did but we had heavy snow covering up til 2 weeks ago.
    I put a heat lamp and water warmer in the coup with a thermal switch that goes on a 35degF. it was on for months.

    In my drawing D2 can be drawn like a photo transistor. I cut a timing wheel on my router that passes between them
    and the setup looks like a very large opto- interruptor.
    I used Gary's schemtic to work out my circuit for the 2 coil 10 pwr strand machine and now it's running a over 4000rpm at 24v.
    It's modeled after (gulp!) the dualpole which functions the same as ssg multicoil monopole. The rotors are 7"D. Charging looks promising.
    I'm able to adjust the timing so that it runs cool at top speed. 2.5A draw.

    I'm spent time comparing your drawing with Gary's before your last post and I'm still missing it.
    I was thinking that the two horizontal lines with a + sign above to the right was a bipolar cap.
    Now I suspect it's a batt. What is throwing me off is the unbroken line from the collector of the PNP around the right side of the drawing.
    Doesn't the base of the NPN have to be connected somewhere on the trace?
    I don't understand what you are showing according to your understanding.
    Are you showing an SSG coil and run batt along with the opto or just the opto cct?

    I've ordered some Opto interrupters and I've done Hall's with pnp's before so I'll get it eventually.

    Thanks bro d
    Let's see if this works:
    Opto SSG.jpg
    let me know if I made any mistakes, I tested it out on an old Adam's type motor before uploading...
    Kind Regards - Patrick A.

  9. #19
    Thanks Patrick A.,
    I didn't want to grieve you with endless "silly" questions.
    Will do the rewrite in a few days and report.
    Thanks again,
    bro d

  10. #20
    Hi Guys,

    This file is a corrected version of the IR trigger for ssg.

    I can only speculate as to why it worked the other way. Bad clip lead, mistaken, etc.

    It's running now with 2, 5 strand coil @24v.

    The ground connection from the emitter of T2 has been removed.

    Thanks,

    bro d

    edited ir ssg trigger.jpg

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