Quote:
Originally Posted by Clondike Clad
I was looking at the LRL and now i see the Photo transistor is being used as a pickup on the scope but what is the detector part is picking up.
also why not up the gain on the scope to see the change in voltage.
Why the photo transistor?
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As the detector was not much stages and as the point is in the screen, the more rapidly at hand was a phototransistor and a beep generator (this is common in electronic LRL. And usual in workbench).