HOW TO:use opus with a laptop...... - Page 2

turbocad6 · 08-28-2006, 02:30 PM

& which are you doing, the p1900 or the opus?

Spaghetti · 08-28-2006, 02:37 PM

I got the Opus 150 which I got cheap off ebay - ex emergency service I do believe. There was a huge batch of 'em and some of us UK'ers snapped 'em up for £50 each. Bargain!

turbocad6 · 08-28-2006, 02:39 PM

cool, that's pretty cheap, hey, why do you have a + sign next to your name at the bottom of the thread/ active users area?

Spaghetti · 08-28-2006, 02:40 PM

Huh? No idea - I don't see it!

turbocad6 · 08-28-2006, 04:01 PM

on my screen I see a litle + after your name, seen it in other threads too...

????

Spaghetti · 08-28-2006, 04:13 PM

I've seen it on one other person - I've wondered about it too. Still can't see it next to my name though!

blessani · 08-28-2006, 08:11 PM

Thats a pretty interesting way of doing this, but there are more subtle options kicking about. Just for search reference, I made a software shutdown controller for laptops http://www.mp3car.com/vbulletin/software-software-development/83060-laptop-half-arsed-shutdown-control-system.html . Its pretty comprehensive and I'm adding more by the day

drPheta · 09-01-2006, 01:57 AM

Does the Carnetix P1900 need to "sense" that the pc has turned on, like the opus does?

Quote:

now the trick here is to have the laptop "tell" the opus that it has turned on... when the power supply knows the laptop has turned on it will imediately power up all it's rails.... everything comes up & remains up for the whole cycle..

the way to have the laptop do this is to tap into a usb cable plugged into the laptop... just open up a cable between the laptop & the usb hub... inside all the insulation & ground shield you should find 4 wires.... red, black, green & white....

the black & the red are 5v - & +... these should be tapped & extended out of the harness... then carefully re-wrap & replace sheilding at the splice.... a thin strip of tin foil wrapped to connect the interupted shield does the job here...

this red & black from the usb of the laptop should now be used to trip a 5v relay... this will power up as soon as the laptop responds to the "on pulse" from the opus & turns on..... this relay should be used to connect a ground from the opus togeather with a green wire that is at the main atx mb connection from the opus.... this green wire going to ground is what tells the power supply that the system has powered up... causing the power supply to fully power up.... walla..... done...... simple & effective....

turbocad6 · 09-01-2006, 02:18 AM

for sure..

& blesani, software may be more subtle, but hardware is more reliable I think...

not to take anything away from your awsome program, don't get me wrong, but a startup/shutdown controller directly wired has to be a more solid solution I would think...

amowolves · 06-25-2009, 07:31 AM

Hi Newbie here sorry for the dumb question but will theis relay work for the usb to opus trickery?

http://www.maplin.co.uk/Module.aspx?ModuleNo=37525

also how do i wire a relay up? i.e how do i know which pins the four wires connect to?

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