After getting bored using my £1 red laser diode (purchased at a fair) pointing at things and then shelving it for years, I recently wondered what else I could do with it? Is it possible to use it for communication, can I get it to speak? To keep it simple and basic, I'll need to design a modulator and driver circuit. Then make a receiver using similar principles, to drive some sort of analogue device - a meter. Potentially, this remote control device could operate over some distance. This video is part 1 of probably 2.
0:0 Introduction
3:03 Setup
5:12 Beam in the dark
6:51 Circuit explanation
11:46 Oscilloscope pictures
12:35 Optical Tx and Rx board pictures
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The microphone used in this video is of my own design: • My Sweetcorn? KZfaq ...
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Contact me: beamerelectronics@gmail.com
#Beamer #electronic #laser
Links:
NE555 datasheet: www.diodes.com/assets/Datashe...
78L05 datasheet: www.ti.com/lit/ds/symlink/lm7...
Notes:
* I failed to mention that the laser beam's brightness is also proportional to the pulse's repetition rate and width.
* In the video, I said the little 100mA series regulator is a L7805, it should be 78L05.
* This type of proportional control system doesn't have feedback from the receiver back to the transmitter.
* The reverse protection diode (D4) will only fully protect if there's an inline (supply) polyfuse of about 100mA.
* In parts, the sound quality of this video isn't as good as I would like - I'm looking into this.