I am searching for a darlington optocoupler schematic with 4 pins. Is there someone that is able to make this? Just a standard optocoupler but with an extra transistor inside.
Thank you!
It is possible to make but usually isn’t done. Most of the current ones don’t detail the transistors just the pins. If you do a google search of the form “fritzing part optocoupler” or better yet the form “fritzing part 4n25” (where 4n25 is replaced by the part you want) that should find any existing parts. If there isn’t one you can make one with the generic IC (there is a tutorial on how to do that) although the schematic will be a box with pins no transistors.
Peter
@IC31 Where do you need the extra transistor to be at? A minimal 4 pin one should have
So what do you mean by “Extra Transistor”
Yes indeed. I’ve made a similar optocoupler for someone (8 channel)
As I last recalled, there might be a 4 pin one in Fritzing
The transistor would be replaced by a darlington transistor (assuming the pins match.)
Peter
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Most likely
With the Darlington Pair
I suppose.
I do think there are Fritzing parts for above instances somewhere in the web (I din bother checking)
Are you sure @IC31? The darlington optocouplers I had in my hands had a ‘calibration input’, similar to the part shown by @RAPTOR7762 up here.
It might be worth to post the actual model you are looking to make a part for?
@IC31 I can just modify any of these
As @real-bombinho mentioned please let us know the exact model (I did a google search “fritzing part 4n25” but no hits for darlington optocouplers
SMD thank you very much!
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OK! I may take another 30min for PCB, schematic and breadboard should be easy
These should be the parts you want
SFH619A Optocoupler-THT.fzpz (6.6 KB)
SFH619A Optocoupler-SMD.fzpz (part will be completed in a while…)
Is it possible that one of the diodes is in the wrong direction?
7 please!
Thank you!
Ah yes, I’ll correct it now
@IC31 The corrected THT part
SFH619A Optocoupler-THT.fzpz (6.7 KB)
The SMD footprint is under creation
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I just had this error message when importing the file…
@IC31 You have to go to (right click → remove part)
to remove the old part from MINE
Then, select yes
Yes
Discard
Save
Close Fritzing, restart fritzing and load the new part