Thanks for the reply Grumpy_Mike.
Grumpy_Mike:
- that the 7805 can be used as is to drop the 12v to 5v,
Wrong
Are you saying the 7805 should not be used to drop 12v to 5v, or only when used with 2 capacitors in the circuit to stabilise it ?
Grumpy_Mike:
There is no difference in safety, 12V and 5V are equally safe. Remember a child's train set has 12V exposed rails.Local regulation however is better to minimise line volts drops.
Very true - I have a 12v slot car track in the lounge as we speak.
"better to minimise line volts drops" - are you saying better to run the 12v and avoid the drop to 5v until the last possible point, or have only 1 7805 at the source ?
Sorry to ask, but your reply confused me a little.