Hi all.
Mad idea I know, but it's a request from a guitarist mate.
As noise levels are not critical for his intended use, for power, I
guess I could use a resistor divider with a 9V battery to, generate
±4.5V, with the centre tap to GND on the PCB, and something like a 47uF
cap between the centre tap and 0V on the battery (which is now -4.5V on
the PCB)
I 'll need to attenuate the level after the effect, which will have
quite a lot of gain, in order to approach unity gain. Question is,
keeping a 1K output impedance, how could I alter values in the circuit
to achieve this? I don't understand the circuit , and I guess I could
always do the obvious, and use a voltage divider at the output using
the 1K final output resistor as one half, and a pot or fixed resistor
to GND as the other half of the voltage divider, but I suspect that
might have a big effect on the output impedance - I don't know if
that's a real problem or not. The output will directly drive a guitar
combo input.
Would such a voltage divider make potential problems for a guitarist?
Any thoughts welcome
cheers,
Dave
Mad idea I know, but it's a request from a guitarist mate.
As noise levels are not critical for his intended use, for power, I
guess I could use a resistor divider with a 9V battery to, generate
±4.5V, with the centre tap to GND on the PCB, and something like a 47uF
cap between the centre tap and 0V on the battery (which is now -4.5V on
the PCB)
I 'll need to attenuate the level after the effect, which will have
quite a lot of gain, in order to approach unity gain. Question is,
keeping a 1K output impedance, how could I alter values in the circuit
to achieve this? I don't understand the circuit , and I guess I could
always do the obvious, and use a voltage divider at the output using
the 1K final output resistor as one half, and a pot or fixed resistor
to GND as the other half of the voltage divider, but I suspect that
might have a big effect on the output impedance - I don't know if
that's a real problem or not. The output will directly drive a guitar
combo input.
Would such a voltage divider make potential problems for a guitarist?
Any thoughts welcome
cheers,
Dave