Questions tagged [photosensor]
The photosensor tag has no usage guidance.
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203045/break-before-make-spdt-relay-out-of-2-spst-relays
I have question concerning: "make before break" relay instead of the posting "break before make" relay. (see post 203045 originally drawn with IC 74HC02 Quadruple 2-Input Positive-...
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Choose a photodiode with sensitivity matching a computer screen
I am showing a rectangle on a computer screen that needs to activate a digital (0/1) photodiode/photo detector that should only be activated when the white rectangle is shown on the screen.
I have ...
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Can TSOP1130 work also at 850mn?
In the sheet, they test it with a 940nm IR LED. There are no clear specifications for the wavelength (range) it works with.
But I have 850nm LEDs (powerful ones).
Will it work the same, or will it ...
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Determining the maximum input power of a photosensor for a given laser power input
I need to measure the average power of a 1550nm pulsed laser output using a photodiode. The datasheet of the Thorlabs FDG03 photodiode can be found here (or if these links fail, the product page with ...
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How to have photo interrupter drive a MOSFET when interrupted? [closed]
How do I get a photo interrupter drive a MOSFET when interrupted?
I don't currently know what MOSFET I'm going to get.
The battery is going to be two Energizer max 9V connected in series.
The load is ...
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I want to detect IR beam of 1064 nm from my rangefinder that will be at least 1200 m away
This question is different from IR sensors not working in sunlight because the principal difficulty is distance and because the sent signal can't be changed in any way
All the sensors I am using are ...
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Need theoretical understanding of basis of IR sensor design
Below is a cutout of the IR sensor part from a heart rate sensor schematic. I need to understand how this part has been designed, what is the basis of the choice of the two resistor values R1 and R2, ...
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Characterizing a PIN photodiode's 3 dB bandwidth
I'm currently attempting to characterize a PIN photodiode's 3 dB bandwidth. The photodiode input is a laser source that is being modulated by an ESA RF output that performs a frequency sweep from 0-1....
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Choosing the right LED IR and the photodiode for optical beam sensor
I need to design an optical beam sensor for about 15-20 cm of distance - any obstacle between an emitter and a detector would trigger an interrupt for a microcontroller.
I was thinking about using a ...
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Pulse sensor issues and How to get -5V from Arduino
So I'm trying to make a pulse sensor using TCRT5000 IR sensor and arduino UNO (giving out 4.8V really from 5V pin) (Baud Rate 19200), and I'm supposed to get a pulse plot like this
But I'm getting it ...
- 532
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Understanding opamp amplifier (simple) behavior - Having trouble understand basic opamp operation
I'm trying to understand the operation of opamps, especially how to amplify a voltage as illustrated in the images from a (for example) photoelement so these can be used a the following comparator.
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Reading 100s photodetectors
I'm trying to measure light intensity at a lot of points in a project. I have about 250 photo detectors (BPX 65). When I had just 1, I tried connecting it to an Arduino board. But I'm not sure, what ...
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Photodetector for short laser pulse
I'm looking at building a detection system for fast laser pulses (532nm wavelength for 250 ps duration). It seems to me that this will require a very fast photodiode with sub nano-secind rise time. ...
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1940s phototube collector material / datasheet for a tube
I have browsed countless pages on Google but cannot find a datasheet that tells you the material/element of the collector plate (the semi-circular plate in the tube) in a phototube (not a ...
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Procedure to express radiantion intensity of a LED in watts/cm^2 , given luminous intensity or total radiant power [closed]
I am calculating Responsivity of a PN junction photodiode by irradiating radiation from LED sources. For this purpose, I have two LEDs, one UV and another green LED. Note that LEDs are placed close to ...
