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Topic: Project 4 - Phototransistor (Read 2435 times) previous topic - next topic


Jul 16, 2019, 02:55 am Last Edit: Jul 16, 2019, 02:56 am by Bendezium
Hi All,

I've noticed a few details about my kit (no wooden base, only 1 red and 1 black long wire) that make me feel like the contents and components may have been switched up since the manual was printed. I wanted to confirm in my picture, is this a phototransistor?

It kind of looks like what is printed in figure 1,

but nothing like what is printed in the "getting to know your parts" section or on the page prior to figure 1.

I hooked it up in module 4 as if it was one. The LED definitely seemed to change colors as I placed my fingers over them to hide the light, but not as I would have expected once the gels were applied. I did read through the thread of the dude having trouble with the green gels. I couldn't get any where near expected results.

Also I didn't find anything in my kit matching the picture that acts as kind of a gel-mount for the alleged phototransistor. Are these not provided anymore?



A give-away for a CdS photo resistor is the zig-zag appearance of the front face.

Note that a photo transistor is a completely different device.

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