trackhound
New Member
I am using a digital panel meter to measure the output voltage from a wideband fuel monitor fitted to a car. I need to measure accurately to within 0.2 volts on the panel meter. I am trying to measure a voltage range from 0.7 to 2.0 volts.
I need to ensure the there is a constant 12v power supply to the panel meter in order to ensure an accurate reading.
I am using a 7812 voltage regulator. The voltage on the car's charging circuit varies from 12.7v to 14.1. However the output of the regulator ranges from 11.3-11.7 volts and does not remain constant at 12 volts. I have double checked my wiring and it is correct.
Any ideas/suggestions? Thanks.
I need to ensure the there is a constant 12v power supply to the panel meter in order to ensure an accurate reading.
I am using a 7812 voltage regulator. The voltage on the car's charging circuit varies from 12.7v to 14.1. However the output of the regulator ranges from 11.3-11.7 volts and does not remain constant at 12 volts. I have double checked my wiring and it is correct.
Any ideas/suggestions? Thanks.