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Aduino + 445NM LASER !!!!!

jimdt7

jimdt7

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Hello i recenlty bought an arduino uno. I want to connect it to my 1W 445nm laser. Its a xj-140 diode with a NJG-18 driver. How can i connect it to my arduino ??:thinking:
 





Trevor

Trevor

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Get a driver with TTL modulation.

Use digitalWrite() quickly to modulate the laser. Apply some logic to make sure you're modulating your driver/laser within specifications.

-Trevor
 
jimdt7

jimdt7

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I was thinking of just turning it on and off !! But what extras will i have with a TTL modulation driver ?? Can these provide 1A ???
 
Jacob32123

Jacob32123

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A TTL driver is a driver that has 2 wires that when connected the laser is on and disconnected the laser is off. They are good if you plan to pulse the laser fast.
 
Trevor

Trevor

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The Arduino will not supply power. The driver will supply your power. The Arduino will provide a signal voltage that will instruct the driver to be either on or off.

The driver will have a separate input for the signal from the Arduino.

-Trevor
 
jimdt7

jimdt7

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So if i understand correct, i will connect the TLL cables to the arduino and the battery to the driver. Wright ?? I will probalby buy a cheap red diode to test the TTL. I will set the TLL cables as outpu tat the aruino right ??? Let me write the code and then post it!
 
jimdt7

jimdt7

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Here is my code:

Code: 
void setup(){
  pinMode(12, OUTPUT); // SETS PIN 12 AS TTL +
}

void loop(){
digitalWrite(12, HIGH);
delay(500);
digitalWrite(12, LOW);
}
 
Trevor

Trevor

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Yeah that sounds right. I'll take a look at your code once you get it done.

You can find a TTL driver in a lot of places, or you could build one yourself.

EDIT: You'll want to add a second delay.

Code: 
void setup(){
  pinMode(12, OUTPUT); // SETS PIN 12 AS TTL +
}

void loop(){
digitalWrite(12, HIGH);
delay(500);
digitalWrite(12, LOW);
delay(500);
}

-Trevor
 
Last edited:
jimdt7

jimdt7

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Ok i corrected my code !


The TLL cables are two so one is positive and the other negativ-ground !
 
Last edited:
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