|
Will two 10ohm 10 watt resistor in (series and/or in parallel) increase or decrease load compared to one 10ohm 10w resistor?
With two, it should be 5ohm which is less resistance but more load but when they are together, is it 20w or 5w or still just 10w? And does more wattage add more load? |
A single 10 ohm resistor on 5V results in 0.5 amp and 2.5 watt of power dissipation.
2 in parallel reduces resistance and increases load, 5 ohm, 1 amp, 5 watt. 2 in series increases resistance and reduces load, 20 ohm, 0.25 amp, 1.25 watt. The 10 watt on the resistor is a maximum rating, the actual power dissipated depends on the voltage applied to the resistor. In both the series and parallel cases the 2 resistors have a combined 20 watt rating, but that will occur at different voltages depending on parallel/series hookup. As mentioned earlier if ran at full rating the resistor will get quite hot, best to run well below the maximum rating. |
Cool! Makes sense with the calculations next to eachother like that!
So isn't it better to have two 10w10ohm resistors in parallel to have less heat than one 10w 5ohm resistor? |
Originally Posted by FlyingFish1
(Post 13180212)
Thanks!
Who wants to hear something funny? Just blew up the second PSU about an hour ago -_- I don't understand what happened though I didn't short anything out like I did with the first one. I turned on the PSU, then I plugged in the positive out banana lead and then when I plugged in the negative output banana lead it went bang and the PSU cut off. Man I hope my charger is ok! Now I need a new antenna and a new PSU. So mad! I was really hoping to run the new 5S this arvo as power came back on from the cyclone. |
I connected the battery banana's once I turned on the PS with the charger connected. Which it says to do in the manual so I thought I'd try it. Charger is a ok. Just did a storage discharge fine on the first 17a PC PSU. Obviously because it requires no power.
|
Originally Posted by FlyingFish1
(Post 13180344)
Cool! Makes sense with the calculations next to eachother like that!
So isn't it better to have two 10w10ohm resistors in parallel to have less heat than one 10w 5ohm resistor?
Originally Posted by FlyingFish1
(Post 13180387)
I connected the battery banana's once I turned on the PS with the charger connected. Which it says to do in the manual so I thought I'd try it. Charger is a ok. Just did a storage discharge fine on the first 17a PC PSU. Obviously because it requires no power.
|
No luck, neither power supply is gonna work :(
Back to the drawing board... |
Just bought this
http://www.ebay.com.au/itm/HP-DL380-...uhb=1#viTabs_0 Will be converting with this method http://www.ultimaterc.com/forums/sho...d.php?t=174225 Thanks for all the help, will report back in a few days, hopefully it all works out and I can run my new 5S lipo. |
| All times are GMT -7. It is currently 11:30 PM. |
Powered By: vBulletin v3.9.3.9 Patch Level 3
Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.