Hi there,
I've been trying to work out the correct way to wire up the following circuit (a 19LED vu circuit that uses LM3915/3916 and a TL072 op amp on the input):
In the past I have only really worked with DC power that is positive and ground, and I am a little confused about the 12+/-... I understand that opamps like the TL072 require split power like this, and such circuits need both the +12 -12 as well as 0v as a reference?
I have a power supply that can give + and - 12vdc, and i then connected ground to 0v and also connect the signal ground to 0v, but the circuit does not perform as it should.. Is how I am wiring it like this correct? Or am i completely wrong? I have tried to google about -/+ vcc supplies like this without much luck..
I hope this makes sense!
Thank you
I've been trying to work out the correct way to wire up the following circuit (a 19LED vu circuit that uses LM3915/3916 and a TL072 op amp on the input):
In the past I have only really worked with DC power that is positive and ground, and I am a little confused about the 12+/-... I understand that opamps like the TL072 require split power like this, and such circuits need both the +12 -12 as well as 0v as a reference?
I have a power supply that can give + and - 12vdc, and i then connected ground to 0v and also connect the signal ground to 0v, but the circuit does not perform as it should.. Is how I am wiring it like this correct? Or am i completely wrong? I have tried to google about -/+ vcc supplies like this without much luck..
I hope this makes sense!
Thank you