I'm new to the exciting world of electronics. My basic understanding is that it is Current (i.e. flow of electrons) which "powers" components - they have no concept of voltage.
If this is the case, then why do we say that the mbed (or any component) requires x Volts to run? What if there's high resistance causing a reduction in Current before "power" reaches the component? Surely then the Voltage is technically the same, but there is less Current to actually "power" the component.
On another forum I heard someone say that the mbed in particular pulls on average 25ma. Why then would it need anywhere near 5V to run?
I = V/R
R is likely to be extremely low on a small wire. So with 5V, there's way more current produced than actually needed.
Obviously there must be a fundamental misunderstanding of the topic, causing my confusion. If somebody could help "correct" it, I'd greatly appreciate it.
Thanks.
If this is the case, then why do we say that the mbed (or any component) requires x Volts to run? What if there's high resistance causing a reduction in Current before "power" reaches the component? Surely then the Voltage is technically the same, but there is less Current to actually "power" the component.
On another forum I heard someone say that the mbed in particular pulls on average 25ma. Why then would it need anywhere near 5V to run?
I = V/R
R is likely to be extremely low on a small wire. So with 5V, there's way more current produced than actually needed.
Obviously there must be a fundamental misunderstanding of the topic, causing my confusion. If somebody could help "correct" it, I'd greatly appreciate it.
Thanks.