Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Noob wants to know the difference between VCC and V+

GigaNerd

GigaNerd

0
Joined
Jan 13, 2012
Messages
14
Points
0
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^^ )
 





Sigurthr

Sigurthr

0
Joined
Dec 11, 2011
Messages
4,364
Points
83
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.
 
GigaNerd

GigaNerd

0
Joined
Jan 13, 2012
Messages
14
Points
0
Sigurthr said:
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.
Click to expand...


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
 
Sigurthr

Sigurthr

0
Joined
Dec 11, 2011
Messages
4,364
Points
83
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+.

13110717001.jpg



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.
 
Last edited:
You must log in or register to reply here.




Top