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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The devices you present here do not appear to have that characteristic. Photo diodes have always datasneet me a bit. 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.

Fill in your details below or click an icon to log in: The image sensors pick up IR! Sean Straw May 12, at Not sure if your confusion about which component is which got resolved.

LP3C – Kingbright – Phototransistor 5mm – Opto & LED Products – Texim Europe – LP3C-KIN

This can be useful for driving a darlington or as input to an opamp or inamp. By continuing to use this website, you agree to their use. Thanks for datasjeet this up!

Dimitar Kovachev January 6, at Kenneth Olsen January 4, at 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: Petes March 2, at Leave a comment Comments When forward-biased, the current through the photo-transistor is proportional to the amount of light.


Mostly harmless… Exploring electronics, programming and photography. Probably someone has misplaced them, when restocking.

It was a photo-transistor. You have 2 LEDs in your picture. This is a useful way to verify that an IR remote control is in fact transmitting. Re-doing the math with these particular values gives the expected current for the LED: To drive the LED, it has to be above 1. Skip to navigation Skip to main content Skip to primary sidebar Skip to secondary sidebar Skip to footer Low voltage. Sean Straw July 8, at IR LED and a photo-transistor – which is which? Use your smart phone or camera.

To find out more, including how to control cookies, see here: A LED or a phototransistor?! You are commenting using your Twitter account. Notify me of new comments via email. Dimitar Kovachev February 2, at The LED is blue, the phototransistor is clear.

Yes it did checked with a camera. Leave a Reply Cancel reply Enter your comment here 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. 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. 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.


The final step was to take a digital multi-meter DMMset it to current measurement, 20mA range and complete the circuit:. Email required Address never made public.

Tony L-533c January 6, at Posted by Dimitar Kovachev. LEDs and photo-transistors can be wired in a similar way — using a current-limiting resistor in series. So a LED will light and a phototransistor will not.

This site uses cookies. You are commenting using your WordPress. It was time to do some tests and measurements. All was fine, until the salesman at the local shop told me:. Under certain conditions, they will conduct electricity.

(PDF) L53P3C Datasheet download

Anyway, I purchased them. How would you go around this issue but with a phototransistor and a photodiode? You are commenting using your Facebook account.