I'm going to take a 5V 500mA power supply and pass it through a digital potentiometer AD5235 and then step it up through an op-amp with a gain 2 to get up to 10V output and put that into voltage based meanwell dimmer controller.
I'm a little confused on how to handle grounding with this. They are circled blue. Can I "ground" the -5V from the pot, and the -10V from the dimmer and the opamp together without damaging the pot by connecting them on the power supply -5V terminal of the wall wart I'll be using?
Also I have a couple questions about the pin meanings:
- WP – Optional Write Protect. When active low, WP prevents any changes to the present contents
- PR – Optional Hardware Override Preset. Refreshes the scratchpad register with current contents of the EEMEM register. PR is activated at the logic high transition.
- RDY – Ready. Active high open-drain output
What is active low vs just low, why the verb active?
What do Logic high transitions and active high open-drain output mean exactly?