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View Full Version : Powerbook Car Charger - Use Inverter?



mattmac
25th October 2007, 09:37 AM
Hey guys,

Doing some contract work for IBM in country NSW over the next few months and looking for a solution to charge my powerbook as I need to log alot of the trips, expenses etc and I can probably play my music too, maybe hit up a few wifi hot spots!

I have found these inverters:

150w from jaycar with cig adaptor: Click Here (http://www.jaycar.com.au/productView.asp?ID=MI5121&CATID=&keywords=inverter&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=)

150w from belkin with cig adaptor: Click Here (http://catalog.belkin.com/IWCatProductPage.process?Product_Id=291646)

Jaycar one is $50 from the shops or I can order the belkin one $50 from my supplier, is one really better than the other? I Don't really know much about this stuff...

If anyone could help that'd be great. Thanks!

SyncMan
25th October 2007, 02:43 PM
150w from jaycar with cig adaptor: Click Here (http://www.jaycar.com.au/productView.asp?ID=MI5121&CATID=&keywords=inverter&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=)

From a non-tech view point.

I trust Jaycar, they are a good business.

Something went wrong, they should be in a better situation to help.

The Jaycar unit looks and feels neater for a car.

Other than that, who knows.

mattmac
25th October 2007, 02:44 PM
Thanks for your help :) Might go down and talk to them..

IIe2PB
25th October 2007, 09:35 PM
For what it's worth I have a jaycar 300w pure sine wave inverter and it easily charges the macbook pro :)

asphotos
25th October 2007, 10:47 PM
id be looking at the sine wave inverters.. the cheap ones will work, but its not very nice AC.

http://en.wikipedia.org/wiki/Inverter_%28electrical%29

mattmac
25th October 2007, 10:58 PM
Yeah so I just heard... a mate is giving me his 150w jaycar pure sine wave inverter. Should work Ok i guess?

Thanks for advice guys.

IIe2PB
26th October 2007, 06:30 AM
I know this is a bit of trivia, but I have a couple of fish tanks, and we have some long blackouts after storms in Brisbane. So I wanted to get something so that if there was a blackout I could keep them alive until the power came on. I tried all sorts of modified square wave inverters and UPS and none would run the brushless motor. The wouldn't start. I found by putting a small light bulb in I could get them started but when I'd switch them off it would clatter to a stop.

So, bought one of these, and they run smoother and quieter of this than they do off the mains power. Problem solved :)

g5agogo
26th October 2007, 12:54 PM
I think that you would be unlikely to have a problem running the Apple through it's adaptor off a cheap square wave inverter.

Whether a square wave output will be suitable for running a piece of equipment entirely depends on the type of load being attached. Some motors can pose a particular challenge for square wave invertors which can lead to problems starting and or damage, inductive and capacitive loads can cause issues. You can get problems from the rapid rise and fall of the waveform and harmonics, power to voltage ratio etc. but these are unlikely to be problematic for modern ac to dc power packs.