Ghani Lawal- Checked out op-amps recommended by https://tools.analog.com/en/filterwizard/:
- All IC's cost $5-10 for 1, contain 2 op amps per IC, all but one is surface mount, the one that isn't surface mount, LT1459 requires a supply current of one uA per op-amp and a min supply voltage of 2.2 volts... Would be perfect, but cost is too high, about $100 worth would be required
- Will use LM324:
- Single supply range: 3V-32V
- Dual Supply range: +/-1.5 to 16V
- Supply current: 1.5 mA (not sure if that's per IC or per op amp)
- 4 op amps/IC
- Price 1:$0.70!!!!
Op-Amp Update
A project log for Music Spectrum and dB Visualizer
Receive input from a 3.5mm jack, divides the music into 7 frequency bands, shows the loudness of each frequency band in DB using LEDS.
Discussions
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