A quick project - putting a mini spectrum analyser into a nostalgic case. You can find more information about the pre-built mini spectrum analyzer, in the ebay auction link HERE: http://goo.gl/IxvM3X also check out the designer's latest projects on sale here: http://goo.gl/oIw5WN AFFLIATED LINKS/ADVERTISING NOTICE All links are Affiliated where possible. When you click on links to various merchants posted here and make a purchase, this can result in me earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network & Amazon. I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to AMAZON Sites (including, but not limited to Amazon US/UK/DE/ES/FR/NL/IT/CAN)