I'd like to build this Atmospheric Charge Monitor: **broken link removed**
It measures the atmospheric electrical charge using an LM3914 with a TL071 in front. But it states that typical atmospheric charge is 100 millivolts and raises to several volts in a storm. Why do I need the TL071 then? Can't the LM3914 measure 100 millivolts and up on it's own anyway?
It measures the atmospheric electrical charge using an LM3914 with a TL071 in front. But it states that typical atmospheric charge is 100 millivolts and raises to several volts in a storm. Why do I need the TL071 then? Can't the LM3914 measure 100 millivolts and up on it's own anyway?