I've multisim 14.2. I not succeeded in make a phototransistor or photodiode to work.
I've tried a circuit like this
But no way to work.
Any clues? I don't know how to do it.
Thanks a lot.
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\$\begingroup\$ Did you read the documentation? \$\endgroup\$– CL.Commented Oct 3, 2020 at 20:47
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\$\begingroup\$ why do you believe that the LED shines on the phototransistor? \$\endgroup\$– jsotolaCommented Oct 3, 2020 at 21:00
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1\$\begingroup\$ The problem was the limitations of my multisim version. I've tried another version and I got it working. Thanks \$\endgroup\$– GuilhermeCommented Jun 10, 2021 at 12:54
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1 Answer
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The problem is that you're trying to use an LED, you need to use a PhotoDiode instead.
If you download and search the Multisim Component Guide for Photo, you'll find the following explanation for both the Rated Photo-Diode and Rated Photo-Transistor:
The photodiode emits a source of infrared light which is detected by the phototransistor. These devices are intended to be used in pairs. You must specify a light channel in each of these paired parts (photodiode and phototransistor). This is done in the Value tab of the component’s properties screen. Each diode must have a different value for its light channel, however, the phototransistor can share the same value with several other phototransistors.
