Need a little help here... not sure why I can't wrap my head around this.
I'm swapping out my Mean Well ELN-60-48P drivers for some LDD 1000HW drivers. I thought it would be pretty easy to hook these up but I started poking around for some wiring diagrams just to double check myself and I've found 4-5 of them and they're all different, so now I'm totally confused.
The VCC+/- and the LED+/- are simple enough and I understand that the power supply and the Arduino will need to share a common ground. What's confusing me is the PWM pin. I assumed (I know, I know...) that I could just hook the PWM pin straight from the Arduino to the LDD pin, but I'm reading where people are frying their boards (or just the pins) and if the Arduino gets disconnected, the LDD will output max voltage to the LEDs so you should put a pull-down resistor between the PWM pin and ground, then others are saying to protect the Arduino, you could put an NPN transistor in between, and then others are saying you should add diodes...
Can someone explain to me what is the most preferred way to hook these up, and why?
Would this work?
Edit: Here's the original (larger) diagram: https://donnie.co/aquarium/arduino-ldd.png
I'm swapping out my Mean Well ELN-60-48P drivers for some LDD 1000HW drivers. I thought it would be pretty easy to hook these up but I started poking around for some wiring diagrams just to double check myself and I've found 4-5 of them and they're all different, so now I'm totally confused.
The VCC+/- and the LED+/- are simple enough and I understand that the power supply and the Arduino will need to share a common ground. What's confusing me is the PWM pin. I assumed (I know, I know...) that I could just hook the PWM pin straight from the Arduino to the LDD pin, but I'm reading where people are frying their boards (or just the pins) and if the Arduino gets disconnected, the LDD will output max voltage to the LEDs so you should put a pull-down resistor between the PWM pin and ground, then others are saying to protect the Arduino, you could put an NPN transistor in between, and then others are saying you should add diodes...
Can someone explain to me what is the most preferred way to hook these up, and why?
Would this work?
Edit: Here's the original (larger) diagram: https://donnie.co/aquarium/arduino-ldd.png
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