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Old 01-13-2012, 09:28 PM #1
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Question Noob wants to know the difference between VCC and V+

Well, yeah

Hi

iam the noob who wants to know the difference between VCC and V+
because i cant find anything about it...
and somehow the search function doesnt work for me, it always says sorry, no matches found.

i hope someone can help me (btw iam from Austria [not Australia] and my english isnt perfect, so... sorry for my spelling mistakes^^ )


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Old 01-13-2012, 09:38 PM #2
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Default Re: Noob wants to know the difference between VCC and V+

For 99% of all uses, it is the same thing. V+ = Vcc. The term originates from bipolar transistor circuits where Vcc and Vee were used for + and - of an NPN, and reversed polarity for a PNP. These days one hardly sees all that, and it is really only an issue in multiple power rail schemes. So unless you're working with a multiple rail circuit, Vcc = V+. Besides, it is common engineering courtesty to label other rails by their voltage instead of obscure letters. In other words instead of seeing Vcc Vee Ve Vc Vb you would just label it out to what it really is.
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Old 01-13-2012, 09:48 PM #3
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Default Re: Noob wants to know the difference between VCC and V+

Very good explanation of VCC & V+ thanks for helping
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Old 01-13-2012, 09:59 PM #4
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Default Re: Noob wants to know the difference between VCC and V+

Quote:
Originally Posted by Sigurthr View Post
For 99% of all uses, it is the same thing. V+ = Vcc. The term originates from bipolar transistor circuits where Vcc and Vee were used for + and - of an NPN, and reversed polarity for a PNP. These days one hardly sees all that, and it is really only an issue in multiple power rail schemes. So unless you're working with a multiple rail circuit, Vcc = V+. Besides, it is common engineering courtesty to label other rails by their voltage instead of obscure letters. In other words instead of seeing Vcc Vee Ve Vc Vb you would just label it out to what it really is.

so... if a driver got both connections, Vcc and V+ ?
does it matter which one i choose ?

actually i mean that driver from o-like:

200mW red laser diode driver /150-350mA adjustable | eBay
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Old 01-13-2012, 10:12 PM #5
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Default Re: Noob wants to know the difference between VCC and V+

Silly PCB silkscreening on that driver, but there is a PCB trace connecting both the Vcc and V+ throughholes with no ciomponent between them on either side, so in this case Vcc still equals V+.




Edit; I think the V+ hole is for a spring, as it is purposely at the center of the driver's back end. The Vcc and Gnd are on the sides, which would be used when this driver is placed in a module. I take back my judgement of "silly" and re-label it as versatile.
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Last edited by Sigurthr; 01-13-2012 at 10:14 PM.
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Old 01-13-2012, 10:19 PM #6
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Default Re: Noob wants to know the difference between VCC and V+

ok, thank you guys for your fast answers

i kinda like that forum^^
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