squizzytaylor

I am pretty sure someone asked a similar question recently,however........can anyone recomend a 240ac- 12volt dc power supply to run a charger and tyre truer off (not at the same time before someone asks!)
The local Jaycar sold me a 4amp switched ac unit and it was ok up to 1amp charge only.
Any thoughts/recomendations much appreciated.

gt

snoopy

Squizzytaylor,

I'd take the power supply back to Jaycar and get STOCK-CODE: MP3112.
13.8v 18Amp switchable powersupply.

Doctor Tamiya

Jaycar (& Metro Hobbies) sell a 15 amp power supply that can run your charger and tyre truer at the same time for around $170.00 .

If you sell your tire truer and use use rubber tyres...problem solved !

(...please forgive me... Victorian humour here..... )

squizzytaylor

Thanx guys!

gt

Ooj

Hi, it was me that asked about the other power supply question. I recently tried out a computer power supply and it was fine in terms of voltage and amps. However, you have to have a decent one to do this though (I used the AOpen 300W psu from my dually workstation) . I am going to buy my stuff overseas now so I will be getting a proper power supply from integy. The 14A SHE is a good buy in hong kong for about $120 versus paying $80-$100 for a good computer power supply which has to be modified.

NOFX

iTrader: (25)

make sure she is 240 volts oog..befor you buy one..otherwise poof...smoken.

this is PAINY in NOFX's control panel

speed

good buy in hong kong for about $120 versus paying $80-$100 for a good computer power supply which has to be modified. [/B][/QUOTE]

I payed $2 for my power computer power supply at the dump.
It do not compear to the ONE i just brought ready to go.
Save the extra dollars its worth it.

sausage_link

120 dollars

u can pick up power supplies for 40-50 bucks

also your not surposed to use them for that, it can cause troubles i heard someone say

aussiedanny

if ya want one of the best, this is what i recommend ,




variable output voltage from 3 to 15VDC
switch mode power supply will deliver up to 40 amps
avaiable from Jaycar electronics

Ooj

Quote Sausage link
"120 dollars

u can pick up power supplies for 40-50 bucks

also your not surposed to use them for that, it can cause troubles i heard someone say"

I totally agree with the trouble you get with the 40-50 dollar computer PSU. The same problems also occur in computers. They usually only pump out 11v and have huge spikes in amps. I was just trying to show that if you do have a decent server/workstation computer power supply and are willing to sacrifice it, it will work just as well; and yes those kind of power supplies do cost $100+ and are not the type you often see in many computers. I just suggested these kind of power supplies as an alternative because they work and are within a competitive price range compared to a proper one. Also if you know what you are doing, you can get used ones very cheaply.

sausage_link

ahh ok
i thought u just meant a standard 300 watt pc powersupply

hawker

hey there

i picked up a whole bunch of computer power supplies for $5 each at a local second hand computer store, just make sure the ratings are 8 amps or more at 12v and you are all set, mine were all rated at 12 amps or higher and work great.

Ooj

Hawker, can you check the numbers with a voltmeter/ampmeter while the power supply is powering the charger? I think 8 amps max for the 12v rail is a little too low. Most old power supplies have a 15-25A max and they rarely produce a constantly clean output. thats why server grade psu's and motherboards have such huge capacitors. However, if you have got it working good, I am very jealous becauase it cost you $5. If so, what brand and model is it?

hawker

i'll try to get a reading for you next race meet, but it seems to be clean flow of power, i get better run times charging from the power supply than from a battery, the power supply model number is:

Brand: IPEX
Model number: ST-230WHF

that has a 12amp output

you need to get the old style ones with the big push button switch on it because the newer ones have there on/off function controlled by the motherboard.

Ooj

You can use an ATX, WATX etc type PSU. All you have to do is short or wire a switch between pins 15 and 16 on the motherboard header......i think. From memory, they should be the middle two pins.

Did you mean a 12v output? It should be something like 12V 20A?

Also if you want more voltage, you have the option to wire up the +12, -12, +5, -5, +3.3 and -3.3 lines in any way you want so you can get a bit more or less power. I.E using the +12 and -5 will give you 7v