how many amps does a car cd player draw when it’s off?
If all is good it should be less than half an amp. the most you should see is about .8 amps, but thats if it has binking lights and corroded wires and such. basically, no more than .5 amps (500 milliamps)
J
And btw, if it is drawing as much as 500mA it wont be a long time of sitting before that can drain your battery. Some radios go into sleep and should draw no more than .2 A but thats assuming its a fariely new and expensive radio. the older radios tend to draw more and i have heard JVC had a problem with excessive draw in their radios but that was a while ago.
I have an Alpine CDE-102 and am just curious what it requires to maintain the presets. This isn’t for a car it’s for a project.
just to maintain the presents shouldnt be more than .2 amps. Its usually all the added lights and wiring that create the extra draw
J
OK basically i’m using a double relay to switch from one power source to another when I turn off the deck. I have it wired up correctly but i’m still loosing presets. I am thinking it’s the time it switches from one input to the other. If this is so I simply should need a capacitor to maintain the voltage when switching inputs. What size capacitor should I use?
all depends on how your switching the circuit. if its manual switching you may need a larger amp capacitor due to the longer open times. If its a electrical switched circuit the capacitor would need to be smaller. i would say buy a capacitor that has 2-3 amps capacitance just to be on the safe side. I would imagine that would be sufficient but its purely a guess. that more an electrical engineering question and im just a stupid heavy equipment tech lol
Look at capacitor specs and get something with a slower discharge rate, that should give it ample energy during the open time
J