Charging a capacitor
07-21-2006, 02:27 PM
#22
50 Watt CAFz'r
Join Date: Jun 2006
Posts: 78
Originally Posted by abnormal72
You can use any value resistor that has a power rating suitable for 14 volts
for example you can use a 10000 ohm 1/4 watt resistor which are about 10 cents a piece or a more expensive power resistor with a lower resistance and higher power rating
The difference being is a larger resisitance takes longer for the cap to charge
for example you can use a 10000 ohm 1/4 watt resistor which are about 10 cents a piece or a more expensive power resistor with a lower resistance and higher power rating
The difference being is a larger resisitance takes longer for the cap to charge
07-21-2006, 07:02 PM
#24
50 Watt CAFz'r
Join Date: Mar 2003
Posts: 359
Originally Posted by Grimmis1027
I can just imagine how long it would be with a 10K resistor too...I could find out, but it's another story (using calculators to calculate ohm's law in a mag years ago...)
t=10000*1FARAD
T=10000 SECONDS or 166.6 minutes or 2.7 hours
2.7 hours * 5 time constants=13.8 hours, this is a long time .
