How do I power a spectrum analyser?
I would also like to add a feature of adding a feature where when the ambient light is lowered, more lights turn on using another LM3915 chip.
Another feature I would like to add is an amplifier and I want the spectrum analyser to respond to background music via a microphone and a pre-amp.
The circuit I am going to use is:
Finally, I would like to ask If this is plausible and what power supply should I use?
It must be able cope with the power demands of these features.
The power supply has to be from rapid electronics, because my school can only buy from rapid.
Also, I would like to know what power amplifier I should use (25w, 30w, etc).
Thanks! (I don't want to use microcontrollers, because I want to make my spectrum analyser look cool by showing the electronics (microcontrollers look simple)