Is it advisable to try to discover a place to make a ground connection on a board with a...

Is it advisable to try to discover a place to make a ground connection on a board with a separate AC power supply?

Helpful? Please support me on Patreon: https://www.patreon.com/roelvandepaar

With thanks & praise to God, and with thanks to the many people who have made this project possible! | Content (except music & images) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing | Music: https://www.bensound.com/licensing | Images: https://stocksnap.io/license & others | With thanks to user Jeremy (electronics.stackexchange.com/users/32926), user Andy aka (electronics.stackexchange.com/users/20218), and the Stack Exchange Network (electronics.stackexchange.com/questions/126379). Trademarks are property of their respective owners. Disclaimer: All information is provided "AS IS" without warranty of any kind. You are responsible for your own actions. Please contact me if anything is amiss at Roel D.OT VandePaar A.T gmail.com