In SX Microcontrollers, SX/B Compiler and SX-Key Tool, johncouture wrote:

Hey all,
 

In defining the specifications for a class using the SX tech board or a breadboard, I need to get some power for the 7805 chip on the board.

 

1) Can I use a the power present on the USB port?  (similar to how I charge my cell phone)

 


2) The 12vdc(?) that is present on an RS-232 port?

 
2) The 12vdc that is inside the powersupply of a pc? (in other words, opening the case and connecting to one of the power connectors)
 

Again, just doing simple circuits for teaching/demonstration, not like we are powering overhead cranes or anything.

 

The reason I don't want to use wall warts is the darth of outlets on the desks (each desk has a PC).  In worse case I'll buy a "Y" cable or power strip but that takes up a lot more room.

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