Car Battery And Alternator Monitor Circuit


Posted on Oct 11, 2012

The monitor is a simple voltage comparator in which a car battery serves as the battery for operation. The input voltage to the comparator is set by adjustment potentiometer PI, which must be adjusted so that the green LED L2 is on when the alternator is operating properly and red LED1 is on when the alternator is inoperative.The circuit operates as follows: When the alternator operates properly, the battery voltage is higher and PI is set so that transistor Ql causes Q2 to be off. That results in Q3 and Q4 being fully on, thus applying current to green LED L2. If the battery voltage is lowered (alternator inoperative),


Car Battery And Alternator Monitor Circuit
Click here to download the full size of the above Circuit.

transistor Ql is turned off. That allows transistor Q2 to turn fully on, applying current to red LED LI, indicating trouble. Once Q2 is on, it causes Q3 and Q4 to go out of conduction.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

stable guitar FM transmitter
RGB LED Controller with PIC18F25K20
tda2005 car audio amplifier circuit diagram project
Running Message Display
Descrete Multistage Light Sequencer
fully automatic emergency light
diy project actual good canon 5d audio
adding audio to arduino projects
Monostable 555 Multivibrator Working Principle and Circuit diagram with Animation
Door bell circuit using NE555
Photo Meter Assesses Ambient Light Schematic
7400 SIREN
Multiplication circuit in broadband video band used



Top