{"id":760,"date":"2014-08-24T17:58:25","date_gmt":"2014-08-24T21:58:25","guid":{"rendered":"http:\/\/freemansgarage.com\/blog\/?p=760"},"modified":"2019-09-16T21:34:58","modified_gmt":"2019-09-17T01:34:58","slug":"diy-ground-loop-isolator","status":"publish","type":"post","link":"https:\/\/www.freemansgarage.com\/index.php\/2014\/08\/24\/diy-ground-loop-isolator\/","title":{"rendered":"DIY Ground Loop Isolator"},"content":{"rendered":"
\"Ground<\/a>
Ground Loop Isolator<\/figcaption><\/figure>\n

Eliminating buzzing and high pitch squeals in your home audio equipment can be a pain. 90% of it is probably the result of a “Ground Loop” as was in my case. This situation can occur when you have two or more electronic devices interconnected by either video or audio cables and they develop a slight electrical difference in their grounding with the power system. The voltage difference can be heard as a buzz or squeal in the speakers and if its large enough, it can damage your equipment. I ran into this problem when I connected a PlayStation 2 video game system to my home stereo and a DLP projector. I could hear a horrendous squeal in my speakers that was as loud as the normal games sounds. Surprisingly, the noise was not between my PS2 and the stereo. It was from the projector. The voltage was back feeding from the video ground of the projector through the PS2 audio grounds and then to my stereo. Crazy…
\nTo eliminate this, you need to somehow separate the grounds so that there is no fighting for ground between the electronics. This is accomplished with a “Ground Loop Isolator”. These can be purchased for less than $15 online or from an electronics store. Today is Sunday, everything is closed, and I don’t feel like waiting a week for an online order.
\nIt is possible to make one if you have enough junk around the house like I do. I had everything I needed to build one in various boxes around the basement and it took me about 30 minutes to assemble.<\/p>\n

What you need:<\/p>\n