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Questions tagged [optical]

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21 views

Building an optical mouse with stm32 µC and pmw3389 Sensor [on hold]

Currently in the Process of trying to build my own USB HID mouse I bought a STM32F103C8T6, the bluepill. In addition I got an PMW3389, which I got from a partly broken mouse. However the tracking on ...
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2answers
171 views

Anyone got these optical encoders working? [closed]

I got these Optical Encoders from a local vendor and connected it to my arduino in the following order; (+)----> 5v (-)---> Gnd (01)--->2 (02)--->3 But, it burnt and smoked out as soon as I ...
3
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1answer
105 views

SMD LED: How to calculate optical power (in mW) from luminous intensity (in mcd)?

I chose an LED for my application but I need optical power, in mW. In the data sheet, luminous intensity is shown in mcd but I did not find formulas for calculation although there are graphs, etc. ...
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2answers
73 views

I've seen many conflicting answers online: For optical storage, does a pit represent a '1' bit or does a land represent a '1' bit?

I've seen many conflicting answers online so: When reading an optical disk, which one of these is true: A 'pit' represents 1 and a 'land' represents 0 or A 'pit' represents 0 and a 'land' ...
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0answers
43 views

Water level measurement using Optical Mouse Sensor

I wonder if anyone has hacked an Optical Mouse sensor to measure water level in an overhead water tank? Its possible to read frames data from the sensor and if those frames could be processed with a ...
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0answers
38 views

Negative feedback optical amplifier

Why the feedback network is necessary in this optical amplifier ? How the circuit would work without the feedback photodiode ?
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3answers
64 views

Opto switch for detecting translucent polypropylene

I am building a liquid handler (a CNC machine that pipettes small quantities of liquids). The machine switches polypropylene "tips" between pipetting different fluids. Positional accuracy within 0.5mm ...
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1answer
41 views

How come optical data modulation is faster than that of electrical modulation while optical modulation is done by electricity?

why optical data is of high bandwidth that that of electrical copper data bandwidth when we use electrical signal to achieve optical data modulation ?
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2answers
449 views

How does an optical (toslink) to HDMI cable/converter work?

I'm looking at the small Sonos optical audio (toslink) -> HDMI cable in front of me and I don't know how it works (https://www.sonos.com/en/shop/optical-audio-adaptor.html). It has an optical audio ...
1
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1answer
111 views

visible light communication data reception

My project is on visible light communication. I use a 555 timer circuit to modulate data with 200 KHz signal using a 3 watt LED. At the receiver I use a photodiode (PS100-6-CER2PIN First Sensor ...
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2answers
450 views

Using SFP modules from a microcontroller

I'm interested in having an embedded device send data optically. This is for test and measurement, where having conductive cables is problematic since it will perturb the measurement. The device is ...
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0answers
19 views

Reading OID code and translate it into a number

We are using OID technology to make a product for blind people. I'm not very familiar with this technology. But it seems it has a sensor package, and an Image processing chipset. Details here I want ...
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2answers
36 views

what is the performance of an OFDM system in one-path channel (Flat response channel),with no multi path propagation?

i work on modelling a OFDM system in a indoor optical wireless channel (LOS channel), since my channel is LOS there is no multi -path propagation , so the delay spread of my channel is much smaller ...
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1answer
333 views

How to increase (optical) power of arduino circuit with LED? Increasing current with fixed voltage

We have an LED that when connected to an Arduino board provides an optical power of 22.58 mW. The circuit is just the LED in the digital Pin with the Arduino powered by the computer using a USB cable. ...
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3answers
551 views

Circuit design using 2-stage opamp

I am making a medical device that requires to sense very very low intensity blue light. I have attached my circuit design which is a 2-stage amplifier(transimpedance and differential amplifier), but ...
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1answer
874 views

How to test an optical sensor board from printer

I have salvaged an optical sensor board from a HP printer just as the one shown c9101-80190-A to use it other hobby projects. The problem is, I cannot be sure whether it's working or not, as I get ...
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1answer
109 views

Can OID technology return an X, Y coordinate?

We are working with a overseas vendor that is using SONIX OID technology. (according to our vendor we are using OID v2) We are using OID technology from them. A smartpen with OID technology is able ...