How to include Lasers in WLED-Setup?

Questions
1

Hello, dear WLED-community, can plase anybody tell me how to include laser-modules
in a WLED-Setup.
I want to connect it to one of the pins from a ESP32MiniNode and toggle the laser on and off via one of the WLED-interface-parameters.
I found out in the video linked in the following link:

that the on/off-switch can be achieved via setting
“digitalWrite” “high” or “low” in the code.
But unfortunately i´m not good in coding and i dont know how to implement it or how to create such a usermod for wled. I guess another solution would be integrating a relay but i really prefer a solution without a relay because i need a small/lowweightsolution and relays are to big for my project.
I hope someone knows how to accomplish that,
thank you anyway for reading, kind regards!
Tonda

2

You can use some transistors instead of relays, if they are laser pointers they don’t have to be big…

3

thx for reply allreaddy ! can you please give me some infos how to use transistors ? Would you use a usermod for this ?

4

I speak to you from ignorance, because I have not tried any mod, but if it is supposed to be for relays, I think that changing them for transistors will be the same. Look at the image of this link https://i.pinimg.com/originals/6a/af/5c/6aaf5cf6c69d25cb5e6cde1e8682e45a.png, replace the diode and the relay with the laser, I think this would be enough… (as long as the mode works as “high” and “low” on the pins…)

5

Sorry for my noob-question but which components exactly are needed for this setup seen in the picture https://i.pinimg.com/originals/6a/af/5c/6aaf5cf6c69d25cb5e6cde1e8682e45a.png , i guess a ESP32MiniNode, a KY008 Laser Module and what else… a 1K-Transistor ? thank you for your help & kind regards

6

Hello, yes, you need a 1k resistor for the driver of the bd137 transistor. And the laser will be connected as if it were the image relay taking into account the polarity.

7

Could also set it up as an on/off LED.

image

8

thx for your feedbacks , i tested it now with the multi-relay-usermod.
I just connected the laser instead of a relay directly to the pin which i declared as relay-pin in WLED.
i used a macro-button to controll the relay which was a available option from the usermod, called “extern”.
It directly worked. No transistors or resistors were needed in this case. but i´m not sure if the laser glows at it full brightness.

also thx to tonyno i will also test this option.

9

You can still connect it directly to the output, but I (speaking from the arduino side) prefer to heal myself and put a transistor in between, any problem with laser consumption that exceeds the maximum power supported by the output could end badly for that exit or even in micro…

Tonyno: Thanks for that information because I haven’t seen it… (I recently discovered this marvelous project).