Groups > sci.electronics.design > #432991

Re: Optotriac resistor selection

Subject	Re: Optotriac resistor selection
Newsgroups	sci.electronics.design
References	<JQpRz.12757$AI2.10239@fx04.iad>
From	bitrex <bitrex@de.lete.earthlink.net>
Message-ID	<dTpRz.12758$AI2.12727@fx04.iad> (permalink)
Organization	frugalusenet - www.frugalusenet.com
Date	2016-10-30 13:13 -0400

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On 10/30/2016 01:11 PM, bitrex wrote:
> I have a MOC3010 optotriac (from da junk box) that I'm trying to use to
> switch about 100VAC from a small inverter brick to a length of EL wire
> about a meter long.
>
> Right now I'm driving the internal infrared LED through a 1k resistor
> from a 3.7 volt supply. The meter shows that the chip is drawing about
> 3mA of current compared to when the pins are disconnected, so I'm
> assuming the LED is turning on, but it doesn't appear to be enough to
> fire the triac when it's hooked up to this load.
>
> Can anyone suggest a more appropriate value, or a way to calculate such?

Ah, wait, I found down at the bottom of the datasheet the MOC3010 needs 
max 15mA, min 8 mA to latch the output at 3 volts. Damn, that's a lot 
for a battery powered app. Time to find a better part...

Thread

Optotriac resistor selection bitrex <bitrex@de.lete.earthlink.net> - 2016-10-30 13:11 -0400
  Re: Optotriac resistor selection bitrex <bitrex@de.lete.earthlink.net> - 2016-10-30 13:13 -0400
    Re: Optotriac resistor selection Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2016-10-30 13:23 -0400
      Re: Optotriac resistor selection bitrex <bitrex@de.lete.earthlink.net> - 2016-10-30 13:35 -0400
        Re: Optotriac resistor selection Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2016-10-30 13:39 -0400
          Re: Optotriac resistor selection bitrex <bitrex@de.lete.earthlink.net> - 2016-10-30 13:45 -0400
          Re: Optotriac resistor selection John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-30 10:52 -0700
            Re: Optotriac resistor selection bitrex <bitrex@de.lete.earthlink.net> - 2016-11-01 12:29 -0400
              Re: Optotriac resistor selection Lasse Langwadt Christensen <langwadt@fonz.dk> - 2016-11-01 09:42 -0700
    Re: Optotriac resistor selection "Benderthe.evilrobot" <Benderthe.evilrobot@virginmedia.com> - 2016-10-30 21:39 +0000
    Re: Optotriac resistor selection Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2016-10-31 02:50 +0100
      Re: Optotriac resistor selection "Benderthe.evilrobot" <Benderthe.evilrobot@virginmedia.com> - 2016-10-31 19:41 +0000
  Re: Optotriac resistor selection John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-30 10:28 -0700
    Re: Optotriac resistor selection bitrex <bitrex@de.lete.earthlink.net> - 2016-10-30 13:36 -0400
      Re: Optotriac resistor selection John Larkin <jjlarkin@highlandtechnology.com> - 2016-10-30 10:49 -0700
        Re: Optotriac resistor selection bitrex <bitrex@de.lete.earthlink.net> - 2016-10-30 13:54 -0400
          Re: Optotriac resistor selection Winfield Hill <hill@rowland.harvard.edu> - 2016-10-30 11:33 -0700
  Re: Optotriac resistor selection "Dave M" <dgminala@mediacombb.net> - 2016-10-30 12:47 -0500
  Re: Optotriac resistor selection Jasen Betts <jasen@xnet.co.nz> - 2016-10-31 05:30 +0000
  Re: Optotriac resistor selection piglet <erichpwagner@hotmail.com> - 2016-10-31 07:56 +0000
    Re: Optotriac resistor selection bitrex <bitrex@de.lete.earthlink.net> - 2016-10-31 05:36 -0400
  Re: Optotriac resistor selection Frnak McKenney <frnak@far.from.the.madding.crowd.com> - 2016-10-31 06:38 -0500
    Re: Optotriac resistor selection bitrex <bitrex@de.lete.earthlink.net> - 2016-10-31 08:59 -0400
      Re: Optotriac resistor selection Frnak McKenney <frnak@far.from.the.madding.crowd.com> - 2016-11-01 08:34 -0500

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