Print Page - How much power can I draw off the +5 rail without problems?

Title: How much power can I draw off the +5 rail without problems?
Post by: dabone on March 07, 2009, 04:36 AM

I'm looking to add a internal wireless serial terminal server to my 128, it will need about 700mW of power.
I am using a 3.3volt regulator to power it, and was hoping to draw the input 5v from the computer.

Now my flat 128 power supply is rated for 4.3a on the 5v, but I've read that some are only rated for 2a.
(I figure the c64 is right out with a stock power supply.)

Can I draw the required load without hurting a standard supply?

I'm also running a uiec from Jim Brain internally already.

Thanks,
dabone

Title: Re: How much power can I draw off the +5 rail without problems?
Post by: RobertB on March 08, 2009, 06:33 PM

Quote from: dabone on March 07, 2009, 04:36 AM
I'm looking to add a internal wireless serial terminal server to my 128, it will need about 700mW of power.

You should be able to power it without problem.

QuoteI'm also running a uiec from Jim Brain internally already.

IIRC, the most power that a uIEC takes is 40 milliamps.

Truly,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug
Notacon 6 / Blockparty 3 on April 16-19
http://www.notacon.org , http://www.demoparty.us

Title: Re: How much power can I draw off the +5 rail without problems?
Post by: darkatx on March 10, 2009, 12:17 PM

Like Big R said - you're fine - it should be more than enough.... ;)

Commodore 128 Alive!

Commodore 128 => Herdware => Topic started by: dabone on March 07, 2009, 04:36 AM