the best thing is to use red ultra bright led. so when you hit them with laser they produce a voltage. amplify it with an lm741 read the array with pic. so you can reveal the detection and also what led you have hit. made the scan in multiplex (with an analog switch) and you can have a "display" where you write pointing the laser on the leds. this is fun. i'm trying to do this for a rotating display. this would be even more interesting.
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biggest waste of time and money that I have ever seen. What is this? Some school project? WOW you build a big everything that has already been built and sold in a store for half the price. Blinking lights, Great PAL>
@silverpizza100 Just because something is available in a shop doesn't mean someone might not want to build his own version. I've built many things that are commercially availbe because I wanted to understand how they work. A store bought one is probably not customisable. His is. Store bought items don't always fill everyone's needs. For some people it's all about the learning. For you it's obviously all about the criticism.
@silverpizza100 That was a pretty shitty comment. Buying something from the store doesn't teach you anything. Anyone that ever started learning about microcontrollers starts by blinking LED's. It's a cheap way to learn how to work with microcontrollers, but you wouldn't know that. There's an education gained by 'blinking lights', but then again, you probably wouldn't understand that either. Being a douche for no apparent reason? Ya, you've got that down perfectly.
First of all Kudos! I just wanted to \know if ambient lighting would trip the photoresistor circuit? Are all photoresistors the same sensitivity perhaps the circuit can tell intensity from the ADC? Where did you get the emitter your using? I notice the beam of light is visable. Is this a special part you picked up? Questions questions!
@KingCyrix Quite a few lasers produce visible beams. It looked like it might be a laser line maker which makes a line of light on a surface rather than a dot.
@rroge5 I was gonna say... you don't need a programmable microcontroller to do THAT, just a phototransistor (not resistor), and a basic adder circuit.
This can detect any visible laser or LED, because the sensor it's using is a photoresister. So the resistance changes across it with different light intensities.
The laser is hitting a photoresister that is in a voltage divider circuit. The resistance changes with the intensity of light. That variable voltage is then sent into my microcontroller through an Analog to Digital converter and in my program I could pick the threshold that I thought worked.
it doesnt really detect anything, its resitance decreases as light intesity increases. you have to change the resitance of the other resistor in the voltage divider to change the intensity that the resitance in the photoresistor becomes low enough to trigger the microcontroler to be on. obviously a laser is very intense light so the Photoresistor can be set to need a very high intensity to allow the voltage out to be high enough.
I'm using a photo-resistor in a voltage dividing circuit. That adjustable voltage is then sent to one of the A/D pins on my microcontroller and I can use the value in software to record hits.
the best thing is to use red ultra bright led. so when you hit them with laser they produce a voltage. amplify it with an lm741 read the array with pic. so you can reveal the detection and also what led you have hit. made the scan in multiplex (with an analog switch) and you can have a "display" where you write pointing the laser on the leds. this is fun. i'm trying to do this for a rotating display. this would be even more interesting.
djtonyxxx5 4 months ago
what the heck is a microcontroller????
pebopablo123 5 months ago
Can this turn on women too?..
MysteryGameMan 1 year ago 9
This comment has received too many negative votes show
biggest waste of time and money that I have ever seen. What is this? Some school project? WOW you build a big everything that has already been built and sold in a store for half the price. Blinking lights, Great PAL>
silverpizza100 1 year ago
@silverpizza100 Ignorant people always criticize what they don't understand. Thanks for proving that thought.
Soulrider2012 1 year ago
@silverpizza100 Just because something is available in a shop doesn't mean someone might not want to build his own version. I've built many things that are commercially availbe because I wanted to understand how they work. A store bought one is probably not customisable. His is. Store bought items don't always fill everyone's needs. For some people it's all about the learning. For you it's obviously all about the criticism.
leglessinoz 1 year ago
@silverpizza100 That was a pretty shitty comment. Buying something from the store doesn't teach you anything. Anyone that ever started learning about microcontrollers starts by blinking LED's. It's a cheap way to learn how to work with microcontrollers, but you wouldn't know that. There's an education gained by 'blinking lights', but then again, you probably wouldn't understand that either. Being a douche for no apparent reason? Ya, you've got that down perfectly.
lycosa2001 9 months ago
First of all Kudos! I just wanted to \know if ambient lighting would trip the photoresistor circuit? Are all photoresistors the same sensitivity perhaps the circuit can tell intensity from the ADC? Where did you get the emitter your using? I notice the beam of light is visable. Is this a special part you picked up? Questions questions!
KingCyrix 1 year ago
@KingCyrix Quite a few lasers produce visible beams. It looked like it might be a laser line maker which makes a line of light on a surface rather than a dot.
leglessinoz 1 year ago
give me that laser! =P
molinobeer 1 year ago
"FUN"?
madassgamer08 1 year ago
haha i Like it
DennisJohannes 2 years ago
That's just fun! Well done!
ArduinoWill 2 years ago
it is pretty cool congrats
zodhr 2 years ago
this can be done also with cheap easy to buy components btw.
rroge5 2 years ago 3
@rroge5 I was gonna say... you don't need a programmable microcontroller to do THAT, just a phototransistor (not resistor), and a basic adder circuit.
moeburn 4 months ago
Can It Detect Any Other Color Laser. Also, Can It Detect LED Light?
lXlNismo11lXl 3 years ago
This can detect any visible laser or LED, because the sensor it's using is a photoresister. So the resistance changes across it with different light intensities.
ModManKev 3 years ago
Photoresistor. it can detect any sort of visible light. I assume it's PbS(I think it can also detect IR radiation).
cldream 2 years ago
Are you measuring the light intensive or what?
NaagLugYaajUaSi 3 years ago
The laser is hitting a photoresister that is in a voltage divider circuit. The resistance changes with the intensity of light. That variable voltage is then sent into my microcontroller through an Analog to Digital converter and in my program I could pick the threshold that I thought worked.
ModManKev 3 years ago 2
cool thought.
What is the lower light can that photoresister detect? if you turn on the light in the room, would that cause the noise?
lichtakira 3 years ago
it doesnt really detect anything, its resitance decreases as light intesity increases. you have to change the resitance of the other resistor in the voltage divider to change the intensity that the resitance in the photoresistor becomes low enough to trigger the microcontroler to be on. obviously a laser is very intense light so the Photoresistor can be set to need a very high intensity to allow the voltage out to be high enough.
ilostmypie 2 years ago
scuse ,found.....
endeffector 4 years ago
man where i fiund this schema? great project.
endeffector 4 years ago
Nice :) What microcontroller did you use?
dorfire 4 years ago
Check out my laser 1 :P
3Mike64 4 years ago
Laser Tag! Cool.
PoPoNellie 4 years ago
what did you use to receive the light signal?
massivewangman 5 years ago
I'm using a photo-resistor in a voltage dividing circuit. That adjustable voltage is then sent to one of the A/D pins on my microcontroller and I can use the value in software to record hits.
ModManKev 5 years ago