Spectrum Analyzer Development - First Test

a LM358 (dual opamp). This video shows a basic level meter built using a LM3915 with a LM3900N (quad opamp) for a preamp (all I have at the moment). The parts (the LM3915's, and various capacitors and LM358's) are in an order waiting for digikey to get the LM3915's in stock again, so once I get the parts I'll post a video with a breadboarded 7 band spectrum analyzer. Also for anyone interested, the song playing is the 1994 remix of December by The Four Seasons. ( youtube.com ). I ...