Optocoupler Cockup Advice

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retepsnikrep
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Optocoupler Cockup Advice

Postby retepsnikrep » Sat Oct 13, 2012 8:15 am

I have made a mistake on a recent schematic for PCB production :oops:

I now need a 4 pin npn optocoupler with pins 3/4 reversed from the standard configuration of the emitter on P3 and collector on P4.

I need the reverse emitter on P4 and collector on P3 to save my pcb's !! A right PITA

Any ideas on a part number/model?

Specs not critical but pinout is :shock: Looking through farnell didn't give any obvious clues.
Regards Peter

Two MK1 Honda Insight's. One running 20ah A123 Lithium pack. One 8ah BetterBattery Nimh pack.
One HCH1 Civic Hybrid running 60ah A123 Lithium pack.

GregsGarage
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Re: Optocoupler Cockup Advice

Postby GregsGarage » Sat Oct 13, 2012 10:49 am

Shame you didn't mess up both sides, you could just mount them on the bottom. :shock: Maybe a AC line monitor opto. I found these, but they appear to only be surface mount (maybe need a daughter board).
http://www.datasheetdir.com/HMHA2801+download
Greg Fordyce

Daewoo Matiz
http://www.evalbum.com/4191

GregsGarage
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Re: Optocoupler Cockup Advice

Postby GregsGarage » Sat Oct 13, 2012 10:55 am

Greg Fordyce

Daewoo Matiz
http://www.evalbum.com/4191

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retepsnikrep
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Re: Optocoupler Cockup Advice

Postby retepsnikrep » Sat Oct 13, 2012 3:55 pm

Wrong way round on the output those Greg, I need pin 3/4 reversed.
Regards Peter

Two MK1 Honda Insight's. One running 20ah A123 Lithium pack. One 8ah BetterBattery Nimh pack.
One HCH1 Civic Hybrid running 60ah A123 Lithium pack.

GregsGarage
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Re: Optocoupler Cockup Advice

Postby GregsGarage » Sat Oct 13, 2012 4:38 pm

Solder them in upside-down, that is mount the optos on the underside of the pcb and solder the legs from the top. That will reverse the output pins and with the dual led inputs it will still work fine. It will look a bit strange, just claim it is a design feature. :lol:
Greg Fordyce

Daewoo Matiz
http://www.evalbum.com/4191

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dillond666
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Re: Optocoupler Cockup Advice

Postby dillond666 » Sat Oct 13, 2012 6:22 pm

Brilliant idea Greg :D

Cock ups are never welcome, but it's comforting to know other people make them too!

D

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Re: Optocoupler Cockup Advice

Postby GregsGarage » Sat Oct 13, 2012 7:20 pm

dillond666 wrote:Brilliant idea Greg :D


Sometimes I worry about these "brilliant ideas", maybe I've had too much practice sorting out my own cockups. :mrgreen:
Greg Fordyce

Daewoo Matiz
http://www.evalbum.com/4191


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