Kingbright LP3C: available from 8 distributors. Explore Sensors on Octopart: the fastest source for datasheets, pricing, specs and availability. L53P3C Kingbright Phototransistors PHOTOTRANSISTOR WATER CLEAR datasheet, inventory, & pricing. LP3C from Kingbright Corporation. Find the PDF Datasheet, Specifications and Distributor Information.

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Photo diodes have always confused me a bit. When a LED is forward biased, it emits light while the datasheeet switches and amplifies the colector-emitter current if the base-emitter junction is forward biased.

By continuing to use this website, you agree to their use. The image sensors pick up IR!

To drive the LED, it has to be above 1. Sean Straw May 12, at Use your smart phone or camera. Both pt and led as with photodiodes are composed of pn junctions and should theoretically light up when forward biased to greater than their turn-on voltage.

This site uses cookies. Anyway, I purchased them. Notify me of new comments via email. All was fine, until the salesman at the local shop told datashheet.


L53P3C Datasheet(PDF) – Kingbright Corporation

You have 2 LEDs in your picture. 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. So a LED will light and a phototransistor will not. The LED is blue, the phototransistor is clear. Thanks for writing this up! How would you go around this issue but with vatasheet phototransistor and a photodiode?

Datasheet Photo Transistor L53P3C

Kenneth Olsen January 4, at Under certain conditions, they will conduct electricity. Dimitar Kovachev January 6, at To find out more, including how to control cookies, see here: This can be useful for driving a darlington or as input to an opamp or inamp. A LED or a phototransistor?!

Posted by Dimitar Kovachev. Skip to navigation Skip to main content Skip to primary sidebar Skip to secondary sidebar Skip to -l53p3c Low voltage. Leave a comment Comments Petes March 2, at Re-doing the math with datasheer particular values gives the expected datashet for the LED: Dimitar Kovachev February 2, at This is a useful way to verify that an IR remote control is in fact transmitting.


LEDs and photo-transistors can be wired in a similar way — using a current-limiting resistor in series.

Fill in your details below or click an icon to log in: Mostly harmless… Exploring electronics, programming and photography. The final step was to take a digital multi-meter DMMset it to current measurement, 20mA range and complete the circuit:.

Probably someone has misplaced them, when restocking. Sean Straw July 8, l-53p3d 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.

datashedt Not sure if your confusion about which component is which got resolved. The devices you present here do not appear to have that characteristic. It was a photo-transistor.

When forward-biased, the current through the photo-transistor is proportional to the amount of light. You are commenting using your Twitter account.