Aduino + 445NM LASER !!!!!

[jimdt7]

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:

 

[Jacob32123]

Link

 

[ped]

To do/achive what :s?

 

[Trevor]

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

 

[Jacob32123]

I assumed he wanted to turn it on and off lol

 

[jimdt7]

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]

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]

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]

Could you suggest me on a ttl driver ???

 

[jimdt7]

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]

Here is my code:

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

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

 

[Trevor]

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.

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

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

-Trevor

 

[jimdt7]

How can i build a TTL driver ????

 

[Trevor]

Please use search.

This thread will help: http://laserpointerforums.com/f47/diy-ttl-diode-driver-32732.html

-Trevor

 

[jimdt7]

Ok making the changes now !!!

 

[jimdt7]

Ok i corrected my code !


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