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SmartBOB controllers and dedicated accessories / Re: PMDX-424 PWM control for Laser
« on: February 24, 2020, 09:41:01 PM »
You are correct that I have a separate 12VDC 5amp power supply. My wiring is as follows
Red - to external 12V supply's V+ terminal
Black - to your external 12V supply's GND terminal
Yellow - to PMDX-424 J12 pin 2 (labeled "Output 1")
In the pics you can see I am getting 5V on the yellow IN REF TO the ground you are calling " PMDX-424 J12 pin 5 ("LGND")" . I was wondering how they were grounding the PWM.
I will go back and tie the external 12v power supply GND to the Ground pin on J12. I guess I was scared hooking up a powerful power supply to the 424 output GND,
Just to make sure I have attached a wiring diagram I am using and have marked your suggestion in RED. I am just worried about hooking 12v GND to the output GND.
I won't be able to try this until Friday night when I get back to the shop. When I was measuring the yellow wire voltage in ref to J12 GND, i was getting 5V at 100%, 2.5 at 50%, 0.5 at 10% So the board output1 is correct.
12strings, thank you very much for your input . Very clear, very knowledgeable and welcoming.
Tripp
Red - to external 12V supply's V+ terminal
Black - to your external 12V supply's GND terminal
Yellow - to PMDX-424 J12 pin 2 (labeled "Output 1")
In the pics you can see I am getting 5V on the yellow IN REF TO the ground you are calling " PMDX-424 J12 pin 5 ("LGND")" . I was wondering how they were grounding the PWM.
I will go back and tie the external 12v power supply GND to the Ground pin on J12. I guess I was scared hooking up a powerful power supply to the 424 output GND,
Just to make sure I have attached a wiring diagram I am using and have marked your suggestion in RED. I am just worried about hooking 12v GND to the output GND.
I won't be able to try this until Friday night when I get back to the shop. When I was measuring the yellow wire voltage in ref to J12 GND, i was getting 5V at 100%, 2.5 at 50%, 0.5 at 10% So the board output1 is correct.
12strings, thank you very much for your input . Very clear, very knowledgeable and welcoming.
Tripp