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Electronic Circuit Simulator in the Browser
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Could you make a PNP Optocoupler in the Active Building Blocks? #595

Open spaddyconnelly opened 3 years ago

spaddyconnelly commented 3 years ago

You have an NPN version. Was wondering if you could make a PNP. This would be helpful for a demonstration for me.

Thanks!!

pfalstad commented 3 years ago

I'm having trouble finding any information about PNP optocouplers. Do you have a particular device in mind, so I could check out the datasheet?

spaddyconnelly commented 3 years ago

Hello Paul,

I got the auto reply for attaching too large of datasheets. Here was my message below without attachments.

Sorry for the late reply but big thanks for getting back to me! What I was thinking of is something we use in the automation industry which technically would be called proximity/photo sensors or photointerrupts, but the idea is the same. We use them for sensing the physical limits of travel for mechanical stages. Here are some screenshots of how most manufacturers give the schematics for either NPN or PNP type. I've attached the .pdf's as well. However for a good list you can search this link on Digikey: https://www.digikey.com/en/products/filter/optical-sensors-photointerrupters-slot-type-transistor-output/548

For some specific sensors you can see they sell both NPN/PNP types which you can see both in the datasheet pictures. Note some of these newer ones have dual outputs to sense two distances, but that's not necessary. Here are some that have that particular type of datasheet: https://www.digikey.com/en/products/detail/panasonic-industrial-automation-sales/PM-K44-C3/3897056 https://www.digikey.com/en/products/detail/omron-automation-and-safety/EE-SX950-W-3M/4986424

Thanks again for reaching out to me and I look forward to using your site!! Shawn Connelly

On Sun, May 9, 2021 at 2:51 PM shawn connelly @.***> wrote:

Hello Paul,

Sorry for the late reply but big thanks for getting back to me! What I was thinking of is something we use in the automation industry which technically would be called proximity/photo sensors or photointerrupts, but the idea is the same. We use them for sensing the physical limits of travel for mechanical stages. Here are some screenshots of how most manufacturers give the schematics for either NPN or PNP type. I've attached the .pdf's as well. However for a good list you can search this link on Digikey:

https://www.digikey.com/en/products/filter/optical-sensors-photointerrupters-slot-type-transistor-output/548

[image: image.png]

Note: some of the newer limit switches have two loads (or can track two distances within the switch) but this isn't necessary. [image: image.png] [image: image.png]

Generally they're 5 or 24V and draw roughly 30-50mA max.

Thanks again for taking the time to reach out to me and I look forward to using your tool online! Really glad I found it. And sometimes wish I had found this tool if it existed back when I was in engineering school! Shawn Connelly

On Wed, May 5, 2021 at 10:54 PM Paul Falstad @.***> wrote:

I'm having trouble finding any information about PNP optocouplers. Do you have a particular device in mind, so I could check out the datasheet?

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ormaaj commented 3 years ago

CMOS optos also exist FOD3184

I think all of these can be modelled with simple subcircuits.