Hi,
I like to build a simple PIC Based Variable power supply.
First I thinking on using LM317, + a digital POT (10k) + PIC MCU to control the output voltage of LM317.
However, I worry the idea may not work , because the digital pot may only take 1mA max only, but the LM317 may need 5mA from the adj to ground.
Is there any other way I can control LM317?
Thank you,
Victor
P/s: reason choosing LM317 is because it 's great performance, and cheap.
I like to build a simple PIC Based Variable power supply.
First I thinking on using LM317, + a digital POT (10k) + PIC MCU to control the output voltage of LM317.
However, I worry the idea may not work , because the digital pot may only take 1mA max only, but the LM317 may need 5mA from the adj to ground.
Is there any other way I can control LM317?
Thank you,
Victor
P/s: reason choosing LM317 is because it 's great performance, and cheap.