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Recent content by StuartB

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    Laser Driver TTL confusion.

    Ok Paul, thanks very much. I was thinking it would just connect to an Arduino running GRBL with the TTL+ connected to pin 11 on the Arduino which would supply the 0 to 5v PWM signal, and the TTL- connected to a Ground on the Arduino, using the seperate TTL- pad on the driver board and not the...
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    Laser Driver TTL confusion.

    That's correct but irrelavent really. As I am more concerned about why there are 2 "TTL -" pads, and not the orientation of the images. They are continuous, but the "-/gnd" for the supply and the "LD -" are not. I also found the description for the Board: Laser diode driver board Voltage: 5V...
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    Laser Driver TTL confusion.

    Hi. May be it's my age but I'm a bit confused with a laser diode driver I just bought. This is the one: In the image on the left it shows "TTL -" on the bottom right pad of the board next to the Laser Diode "-" In the image on the right it shows the back of the board and shows "TTL -" that...
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    Hi From Uk.

    Thanks very much Alien Laser.
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    Hi From Uk.

    Thanks MattyDC
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    Hi From Uk.

    Thanks very much for a very warm welcome. I've already learned a lot from here, but no doubt there is still much more. I just hope all the new stuff going in does'nt push any of my old stuff out. :)
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    Adjusting Current With Multimeter?

    Ok. Thanks very much, you've convinced me. If I had a spare one I could sacrifice I might give it a go, but I only have the one.
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    Hi From Uk.

    Although I have posted here before, I forgot to add a post here, bit rude I know. I live in Leicestershire in the UK. I'm 59 married with 5 kids and 7 grandkids. Retired Driver. Hobbies are electronics (any kind) and repairing pc's/phones/tv's/powertools/or anything that breaks really, even...
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    Adjusting Current With Multimeter?

    Thanks for the reply. It's actually a multiturn pot (the blue one with the gold screw) not a 1 turn, so it would only increase the current very gradually. I don't see how it could hurt the laser diode but was'nt sure. I asked because I've never seen anyone using the multimeter method. To me it...
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    Adjusting Current With Multimeter?

    Just wondered if: With the current turned all the way down to start with and the voltage set somewhere between min and max of the diodes rating, is it ok to adjust the laser diode current using a multimeter in series with the diode, instead of using a string of diodes and resistor, or does it...
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    Best way to connect dummy load.

    Hi BowtieGuy. Thanks for the welcome. I did see the dummy load set procedure but wanted to check here as well. The voltage trimmer is because the driver can be used for other things as well as laser driver. If anyone is thinking about buying this type of driver board they should check the...
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    Best way to connect dummy load.

    Thanks for clearing that up. I'm greatful for any help I can get. The more I know the less chance I have of getting it wrong. I have made a laser engraver using the method that a lot of people use, especially on Instructables website. I used the LM317 method of a constant current device for...
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    Best way to connect dummy load.

    Thanks very much Diachi. May be I should'nt have called it a constant current driver. It's one of these: 2A Laser Diode Driver for 405, 450, 520, 635 and 660nm Diodes TTL Modulation, 12V (V2) - OdicForce
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    Best way to connect dummy load.

    Hi everyone. Just joined the forum and this is my first post. I've been watching the forum for quite a while now and decided to join as there seems to be a wealth of information here and a lot of knowledgeable helpful people. I would like to ask for a little info about setting up a dummy load...




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