Quote Originally Posted by robertg View Post
Again a probably another rookie mistake...Solution was to increase the VDD to 4V! minimum. (software does recommend 4.5V) but 4 seemed to work fine.
The programming spec document for the 12F508 states that the min VDD for programming and bulk erase is 4.5V, so I'd increase that just to be safe.
https://ww1.microchip.com/downloads/...Doc/41227E.pdf