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1  Using Arduino / Installation & Troubleshooting / LINUX IDE freezes when started on: January 04, 2013, 06:11:35 pm
IDE will cause a system freeze when started.

OpenJava will not work @ least version 1.7 dose not.
IDE will cause a system freeze when started.
I removed Openjava & I installed Oracle 1.7.0_12 and it works better but still freezes up often
Also I used 1.03 version of IDE.

$java -version
java version "1.7.0_12-ea"
Java(TM) SE Runtime Environment (build 1.7.0_12-ea-b08)
Java HotSpot(TM) 64-Bit Server VM (build 24.0-b28, mixed mode)

Experimental:  JNI_OnLoad called.
Stable Library
Native lib Version = RXTX-2.1-7
Java lib Version   = RXTX-2.1-7
2  Using Arduino / General Electronics / Re: 2 Power supplies on: January 03, 2013, 10:00:00 am
OK thanks I won't run my ic's @ 6V
Why dose the Arduino board require this to run?  Seems odd

Tieing grounds together is what I needed to here, but I thought this would be dangerouse because there might be current flow between the two all the time.
3  Using Arduino / General Electronics / 2 Power supplies on: January 03, 2013, 02:17:46 am
Is it ok to supply your breadboard with one PW supply and the Arduino with your your computers USB port.

I want to run  a output pin to the base of a NPN transistor.
The transistor is powered by an external PS to the collector through the load.

An input pin also uses a ground from the external PS to see a LOW.

Can most ICs work with VCC  @ +6-7V so I can just use the same external supply for the Arduino and the bread board?
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