czwalga00gt
New Member
I have a device that needs to hold 9.5 volts during cranking or it will shut off. The catch is that the device has to work in order for the car to start.
When the battery has a low charge (still enough to turn the car over), the car still will not start because it's not getting a crank sensor voltage coming from the conversion module i'm using.
So, I want someone to double check my thinking here.
I'm going to put a diode running to the module, then a capacitor in parrallel with the module, then a resistor between the cap and module.
Just trying to figure out the values needed to power the module for 1 second.
The modules draws, 500mA at 12v. P= 6 watts.
P=v^2/r
r=24ohms
t=F*r
1=F*24
C=.05~ F
When the battery has a low charge (still enough to turn the car over), the car still will not start because it's not getting a crank sensor voltage coming from the conversion module i'm using.
So, I want someone to double check my thinking here.
I'm going to put a diode running to the module, then a capacitor in parrallel with the module, then a resistor between the cap and module.
Just trying to figure out the values needed to power the module for 1 second.
The modules draws, 500mA at 12v. P= 6 watts.
P=v^2/r
r=24ohms
t=F*r
1=F*24
C=.05~ F