L-53F3BT DATASHEET PDF

Vijora Petes March 2, at Probably someone has misplaced them, when restocking. When forward-biased, the current through the photo-transistor is proportional to the amount of light. Re-doing the math with these particular values gives the expected current for the LED: This site uses cookies. A LED or a phototransistor?!

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Vijora Petes March 2, at Probably someone has misplaced them, when restocking. When forward-biased, the current through the photo-transistor is proportional to the amount of light. Re-doing the math with these particular values gives the expected current for the LED: This site uses cookies. A LED or a phototransistor?!

You are commenting using your Facebook account. The LED lf3nt blue, the phototransistor is clear. The devices you present here do not appear to have that characteristic. Thanks for writing this up! How would you go around this issue but with a phototransistor and a photodiode? Photo diodes have always confused me a bit. Create a free website or blog at WordPress. Notify me of new comments via email.

All was fine, until the salesman at the local shop told me:. Chanced upon this post, and while the proper testing of the components to electrically differentiate the two is useful knowledge, but thought it worth mentioning: This is a useful way to verify datashest an IR remote control is in fact transmitting.

When a LED is forward biased, it emits light while the transistor switches and amplifies the colector-emitter current if the base-emitter junction is forward biased. IR LED and a photo-transistor — which is which? It was a photo-transistor. Sean Straw Datashest 12, at This can be useful for driving a darlington or as input to an opamp or inamp. Email required Address never made public. Not sure if your confusion about which component is which got resolved.

So a LED will light and a phototransistor will not. Note that a reverse biased LED can conduct when light of a suitable wavelength is presented generally centered around the wavelength which that LED emits when normally driven. Low voltage. Mostly harmless Posted by Dimitar Kovachev. This leads us to our criteria — the current through a forward-biased LED is a constant; the current through a forward-biased PT varies with light. To drive the LED, it has to be above 1. Yes it did checked with a camera.

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L-53F3BT DATASHEET PDF

Use your smart phone or camera. It was a photo-transistor. Photo diodes have always confused me a bit. Re-doing the math with these particular values gives the expected current for the LED: Thanks for lc3bt this up! The final step was to take a digital multi-meter DMMset it to current lc3bt, 20mA range and complete the circuit:. The devices you present here do not appear to have that characteristic.

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Not sure if your confusion about which component is which got resolved. It was a photo-transistor. So a LED will light and a phototransistor will not. Create a free website or blog at WordPress.

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