Pro/Forums - View Single Post

bigben2k · 07-18-2002, 08:35 AM

Here's some math:

P=VI (power=voltage * amps)

V=RI (voltage=resistance * amps)

Knowing these two equations is the fundamentals of electronics.

You can then extrapolate P=RI^2. Since you know that R=0.19, and that I=20, P will be 76 Watts. Most resistors are available in 1/4 (most common) and 1/2 Watt (common), so you'll have to do a little digging, and I can tell you off hand, it's going to be hard to find. I'd start with suppliers of automotive audio equipment.

Allelectronics sells a 1 Ohm, 75 Watt, flat ceramic type resistor, for $3.50 .

You might consider figuring a way to alter the PSU instead, it'd probably be cheaper than trying to dissipate 76 Watts.

07-18-2002, 08:35 AM	#7
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	Here's some math: P=VI (power=voltage * amps) V=RI (voltage=resistance * amps) Knowing these two equations is the fundamentals of electronics. You can then extrapolate P=RI^2. Since you know that R=0.19, and that I=20, P will be 76 Watts. Most resistors are available in 1/4 (most common) and 1/2 Watt (common), so you'll have to do a little digging, and I can tell you off hand, it's going to be hard to find. I'd start with suppliers of automotive audio equipment. Allelectronics sells a 1 Ohm, 75 Watt, flat ceramic type resistor, for $3.50 . You might consider figuring a way to alter the PSU instead, it'd probably be cheaper than trying to dissipate 76 Watts. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101