All Questions
Tagged with laser phototransistor
8
questions
3
votes
3
answers
3k
views
How to transmit data with a laser beam? [closed]
I am working on a project about data transmission with lasers. The project is very young so I can modify my current planned setup if necessary.
This is the actual planned setup:
Every raspberryPi ...
- 43
22
votes
1
answer
2k
views
Optical audio transmitter can't handle speech
This is a question relating to my project on an optical audio transmitter.
I wired up a very simple device in which I use an audio signal transformer (EI14) to modulate the intensity of a laser beam (...
- 255
2
votes
1
answer
468
views
Cost Effective Laser Detection
I am a novice / hobbyist and I have a project in mind that involves detecting where a laser is aimed at on a relatively large scale (300+ sensors). I've found circuits that would work on a small scale ...
- 23
0
votes
1
answer
365
views
Is there a digital input that registers light? / Can only ADC pins register signals from an LDR?
I have been building a traffic light over the past year as a GCSE project. Initially, what was unique about it was that, the pedestrian interface would light up when it was dark outside. Subsequently, ...
- 17
1
vote
1
answer
587
views
How does a Watt (1mW from a laser) relate to Amps (20mA max current rating for collector of a phototransistor)?
How does a Watt (1mW from a lasermodule) relate to Amps (20mA max current rating for collector of a phototransistor) ?
I want to know if the 1mW output from the laser is within or outside the range ...
- 13
0
votes
1
answer
272
views
Detecting Multiple Lasers
I'm looking to design a game where players fire a gun at a target using LASERS or IR. The target only registers a hit when a certain amount of players (say 3) are hitting the target consistantly for ...
- 91
4
votes
4
answers
2k
views
Large Active Area phototransistors? And can solar cells be a replacement
Me and my friends are trying to build a laserharp driven by arduino as a learning exercise. Currently we are using a phototransistor to interrupt the laser light and play music.
However the ...
- 283
1
vote
1
answer
745
views
How do i build a laser based tachometer?
I want to build a tachometer that has to be somewhere around 1 meter from the rotating shaft.
I'm still to build a prototybe based on IR diode and phototransistor, but I'm afraid, I would get too ...
- 5,571