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Old 1st March 2011, 02:17 PM   #1
graygem is offline graygem  United States
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Default Can 555 circuit supply enough neg voltage

Can a 555 negative supply circuit, like the one below I pulled from another schematic, supply enough negative voltage to a LM324 and a AD736JN? I'm using a 9v battery for power. The LM324 needs supply current of 3mA and the AD736JNZ 200uA. The Circuit I got it from was supplying 1 TL072. The schematic I'm trying to build is using a MAX680 charge pump from 2 - 1.5v cells supply, but the MAX680 is a little too expensive.
Thank you

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Old 1st March 2011, 05:19 PM   #2
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This should supply 20ma. Lots of info on the web. Andy
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