SV: usb power? (on mac)
Archiver
Posts: 46,084
Greetings!
Yes it should be doable.
I don't remember which pin is what, but one of the pins is Gnd, and
another is +12V
So get a cable, cut it open and measure.
Then add a decent 5V regulator (A 7805 and couple of caps) and you
should be all set.
As a matter of fact, some people mount relays on this connector, to
switch on/off their monitors as this pin gets power as soon as you
switch the computer on.
:-)
Trygve
Opprinnelig melding
Fra: Matt Gilbert [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=RGiUpIhbOe2kJ5UP58X94eSuYqgiweKFajYeDbiZ15PqQnqx4GmlMO_uDMN3SF3zcYVRclxMnXepZhk]gilb_jm@y...[/url
Sendt: 13. juni 2004 19:05
Til: basicstamps@yahoogroups.com
Emne: [noparse][[/noparse]basicstamps] usb power? (on mac)
hey all,
does anyone know if you could set up a stamp to use power from the usb
jack instead of a 9 volt on a mac? anyone tried this?
thanks,
matt
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Yes it should be doable.
I don't remember which pin is what, but one of the pins is Gnd, and
another is +12V
So get a cable, cut it open and measure.
Then add a decent 5V regulator (A 7805 and couple of caps) and you
should be all set.
As a matter of fact, some people mount relays on this connector, to
switch on/off their monitors as this pin gets power as soon as you
switch the computer on.
:-)
Trygve
Opprinnelig melding
Fra: Matt Gilbert [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=RGiUpIhbOe2kJ5UP58X94eSuYqgiweKFajYeDbiZ15PqQnqx4GmlMO_uDMN3SF3zcYVRclxMnXepZhk]gilb_jm@y...[/url
Sendt: 13. juni 2004 19:05
Til: basicstamps@yahoogroups.com
Emne: [noparse][[/noparse]basicstamps] usb power? (on mac)
hey all,
does anyone know if you could set up a stamp to use power from the usb
jack instead of a 9 volt on a mac? anyone tried this?
thanks,
matt
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
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Comments
Guess my memory is playing up again...
(It's like a good cheese; mouldy :-)
How stable is that 5V?
:-)
Trygve
Opprinnelig melding
Fra: Al Williams [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=NhN4-cs63Bc_NVLDGr25BLe-xkOREb1xvLI8Ha1S0iLlLGGOp6ltkKgIJql4zdLEcXG2isMvjihPVL1wcA]alw@a...[/url
Sendt: 14. juni 2004 14:44
Til: basicstamps@yahoogroups.com
Emne: RE: [noparse][[/noparse]basicstamps] usb power? (on mac)
I don't know about the mac, but I do this all the time on the PC.
However, the power is +5V, not +12V. Every cable I've ever cut has red
for +5 and black for ground and I solder a 2 pin female header on it and
that's 5V.
Regards,
Al Williams
AWC
*Easy RS232 Prototyping
http:/www.awce.com/rs1.htm
Original Message
From: Trygve Henriksen [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=RpY2FKuR2chtVRTujpOQjHjSrfjjXXlaNp3QNZRaQFA6sSTY1hgCMYzkvx3-RrcKD47zYKiRExXqZEe-cpOFMg3XH6rp]trygve.henriksen@v...[/url
Sent: Monday, June 14, 2004 4:05 AM
To: basicstamps@yahoogroups.com
Subject: SV: [noparse][[/noparse]basicstamps] usb power? (on mac)
Greetings!
Yes it should be doable.
I don't remember which pin is what, but one of the pins is Gnd, and
another is +12V So get a cable, cut it open and measure. Then add a
decent 5V regulator (A 7805 and couple of caps) and you should be all
set.
As a matter of fact, some people mount relays on this connector, to
switch on/off their monitors as this pin gets power as soon as you
switch the computer on.
:-)
Trygve
Opprinnelig melding
Fra: Matt Gilbert [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=eyznLa33eFciUfDxEWIdPZOMGQaTgbVDmTRQXocCGHktL8eMFinvmgkxQ7YOOEIld023yLa9rZBvoOs]gilb_jm@y...[/url
Sendt: 13. juni 2004 19:05
Til: basicstamps@yahoogroups.com
Emne: [noparse][[/noparse]basicstamps] usb power? (on mac)
hey all,
does anyone know if you could set up a stamp to use power from the usb
jack instead of a 9 volt on a mac? anyone tried this?
thanks,
matt
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject
and Body of the message will be ignored.
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