Hi,
This circuit was recently suggested in another thread:
"Try this, If you have room for 3 more components you could use 2 5 volt zener diodes and a resistor to limit the current. The resistor and the diodes are connected in series so that both diode will drop 5 volts, the GND is connected to the center point of the 2 diodes then you will get +- 5 volts at the other ends of the diodes. The 12v volts used is very marginal for running the 2 zeners but it may work, 15v would be much better also the resistor will determine how much current is available to the circuit and how much power it will draw from the power supply. You probably will not need more than 20ma for the circuit. If you are using 12v try a 68 ohm resistor to start."
What I'm trying to do is create a bi-polar supply from a + 12 V dc supply. This circuit was suggested, but I'm not sure if it will work or not. (I can't get it to work on a board anyway)
I think the original poster thought I was using a 12 V AC supply, but I'm not it is 12 Vdc.
Does anyone know what circuit he's referring to?
This circuit was recently suggested in another thread:
"Try this, If you have room for 3 more components you could use 2 5 volt zener diodes and a resistor to limit the current. The resistor and the diodes are connected in series so that both diode will drop 5 volts, the GND is connected to the center point of the 2 diodes then you will get +- 5 volts at the other ends of the diodes. The 12v volts used is very marginal for running the 2 zeners but it may work, 15v would be much better also the resistor will determine how much current is available to the circuit and how much power it will draw from the power supply. You probably will not need more than 20ma for the circuit. If you are using 12v try a 68 ohm resistor to start."
What I'm trying to do is create a bi-polar supply from a + 12 V dc supply. This circuit was suggested, but I'm not sure if it will work or not. (I can't get it to work on a board anyway)
I think the original poster thought I was using a 12 V AC supply, but I'm not it is 12 Vdc.
Does anyone know what circuit he's referring to?