5W 445nm Laser Diode Driven by PWM

Schematic: github.com/eve...
I picked up a 5W laser diode with some spotty documentation. It has a 2 wire pulse width modulation (PWM) input and a 3 wire transistor-transistor logic (TTL) input. Using an Arduino, I threw together a simple 5V PWM output, that successfully varied the laser power output.
The short blip at power-on is due to either a high PWM output when the arduino initializes, or the floating TTL input.

[@sidneydrouet1323]

Thank You for sharing. Greatfully appreciated.

[@eyelook2jesus]

Thanks for showing this. I am trying to get a similar setup working.... No luck yet

[@GeoffintheGarage]

Thanks, and good luck! Are you using the same banggood 5w laser?

[@GeoffintheGarage]

I finally got a chance to revisit this project and put together a little more documentation. If you are still working on it, maybe this will help: github.com/geoffworks/LaserPWM

[@ravalrifaisal8450]

sir can u give..... how this schema... please... and thx u sir

[@darkracer1252]

that looks like it's pwm controlled not pwm driven.

[@flajunior8]

Hi, i need tô make, can you send or explain the schematic ?

[@GeoffintheGarage]

Sorry for the long delay in replying, I finally got a chance to revisit this project: github.com/geoffworks/LaserPWM

[@hi-techelectronics5118]

How we can make a pwm circuit

[@GeoffintheGarage]

Sorry for the long delay in replying, I finally got a chance to revisit this project: github.com/geoffworks/LaserPWM

[@hi-techelectronics5118]

@@GeoffintheGarage thanks

[@nayomeanga4339]

can you please share the circuit diagram

[@flajunior8]

Can you make a circuit?

[@GeoffintheGarage]

Sorry for the long delay in replying, I finally got a chance to revisit this project: github.com/geoffworks/LaserPWM

[@narindersingh8248]

Hi can u send me the wiring of this

[@narindersingh8248]

To attach with CNC controls

[@GeoffintheGarage]

@@narindersingh8248 Sorry for the long delay in replying, I finally got a chance to revisit this project: github.com/geoffworks/LaserPWM

[@papsmcgee]

I'm trying to set up a driver that looks similar to yours. What did you wire the third wire on the power input to? When I leave it alone I get full power all the time. I also tried connecting to ground which sort of works but 255 is off and 0 is full power.

[@GeoffintheGarage]

I'm not sure what I had the third wire connected to, either free floating or ground. I can double check this weekend and post back.

[@papsmcgee]

@@GeoffintheGarage I'd appreciate that.

[@GeoffintheGarage]

Just looked over some notes. I left the third wire free floating. If it helps, the Arduino sketch I used was a copy of the stepper motor driver that comes as an example in the Arduino install.

[@papsmcgee]

@@GeoffintheGarage thanks for looking into that for me. I'll check out the sketch.

[@nayomeanga4339]

hi, can you please share me a pic on how you set up a driver. It really helps me a lot