Hi ,
To revive this thread:
its a good idea to power the arduino from as low as possible to reduce heat and wasted power.
I would still like to arrive at an elegant solution which would enable me to have one power supply
for the project as this will allow me to switch on and off with one switch as opposed to having two
separate supplies i.e. one for arduino and one for the bulb -12 volts, and I assume needing two switches
to operate.
Is there some simple way to provide a minimum 4.5 volts for the arduino by a step down of the 12 volt
bulb supply which I will have to provide anyway.
Hope I have made this clear.
Any suggestions welcome.
keef