This is a quiet simple question but I really don't get it. I've just started with electronics not a while ago and I'm experiencing problems with the different types of ground (signal ground, chassis ground, earth ground) in DC circuits. As to what I knew, the ground was a wire that linked a circuit to the earth to discharge any current if something would got bad. Now, when I started looking at circuit schematics, I noticed the little arrow pointing down meant signal ground, I assumed it was the negative of the DC circuit. Then came time to hook my circuit to a 5V current regulator to provide it with 5V current from a 9V battery. The problem is the regulator (LM7805) has three legs: Input, Ground and Output. Where am-I supposed to connect those to? Anyways, if anyone could explain to me what all this means, or perhaps refer me to a website with would provide me the information I need. Thanks.
Also, I came across this example circuit:
Input + --------------------LM7805-----------------Output +
|
|
Input - -----------------------|--------------------Circuit(Signal) Ground
Would this perhaps solve the issue? To my knowledge, there is something wrong as there is a direct connection between a 9V negative and 5V negative since we're talking DC. Maybe I'm wrong and everything is right since all grounds are referred as to 0V, but its the DC part that gets me confused.
Anyways, hope someone will understand and shed light on this for me, because I'm rather lost. Thanks again.
Also, I came across this example circuit:
Input + --------------------LM7805-----------------Output +
|
|
Input - -----------------------|--------------------Circuit(Signal) Ground
Would this perhaps solve the issue? To my knowledge, there is something wrong as there is a direct connection between a 9V negative and 5V negative since we're talking DC. Maybe I'm wrong and everything is right since all grounds are referred as to 0V, but its the DC part that gets me confused.
Anyways, hope someone will understand and shed light on this for me, because I'm rather lost. Thanks again.