Hi
I have built a big circuit with 3 other circuits and they all require 9V batteries, (one is made for 12V but operates on 9V) i want to get rid of the batteries and connect a 9V Mains plug to stop having to change the batteries as this circuit will be on constantly. I know i cant just connect the adaptor. i have an adaptor that is 9V 350ma, what type of resistors do i need for the circuits to perform just like they would with the batteries. i dont know how much current the circuit will draw, Also i have a relay connected to an oscilator so the relay turns on, off, on, off and makes a noise is there a way to muffle it.
Any suggestions
Thanks, Chris
I have built a big circuit with 3 other circuits and they all require 9V batteries, (one is made for 12V but operates on 9V) i want to get rid of the batteries and connect a 9V Mains plug to stop having to change the batteries as this circuit will be on constantly. I know i cant just connect the adaptor. i have an adaptor that is 9V 350ma, what type of resistors do i need for the circuits to perform just like they would with the batteries. i dont know how much current the circuit will draw, Also i have a relay connected to an oscilator so the relay turns on, off, on, off and makes a noise is there a way to muffle it.
Any suggestions
Thanks, Chris