An expert who has achieved level 3 by getting 1000 points
An expert that got 20 achievements.
An expert that got 10 achievements.
An expert that got 5 achievements.
Re: wanting to install a mp6212 cd player in my tool box...
For proper operation, you will need 12V.
Some vehicles wont start unless there aer 8V.
Minimally 8VDC, but 12V recommended for proper internal amplifier operation. Purchase a used PC Power supply, and wire directly to the hard drive power pug. Inverters are also available.
BTW Amps are a measure of AC Current, not DC. DC is measured in Volts.
An Electrical appliance rated to work on AC will not work with DC, and vice versa.
You will need an invertor of some type to change the signal and wavelength.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
You need to know in advance exactly how much current will be used and not just the maximum.
Resistance = voltage / current, so if you want to drop 9 volts at 1 amp, you'd use a 9 ohm resistor, but if it uses only 1mA, 9,000 ohms will be necessary. Most voltage converters use regulators which are much more complex than a single resistor.
I have been installing car audio for over 40 years.A small adapter like you use to charge a phone,Doe,s not have enough amps in it to run the deck (Properly) When you crank up the vollume, The deck will cut out, You Can buy a bigger 12 Volt power supply from radio shack or the source that will power it (Properly) It should be at least 3 amp output .
A voltmeter is NOT the correct tool to check for an "ignition-off draw". A voltmeter will show 12 volts if ANYTHING is operating.
There are some things that are SUPPOSED to keep operating when the vehicle is shut off. These include, but are not limited to: > Powertrain Control Module keep-alive memory > Radio preset memory > Clock > Security/ alarm system > Remote control recievers (door locks, etc.)
What you need to know is how many AMPS are being drawn from the battery when the vehicle is shut off. This is done by using a shunt bar connected between the battery terminal and the battery cable connector.
Set the ammeter to the lowest setting (usually 2 or 5 amp scale) Connect the ammeter leads accross the shunt bar. Turn off all electrical accessories, ignition switch, etc. and wait for a minimum of 45 minutes for all of the computer systems to go into "sleep" mode. Then open the shunt bar and read the amperage.
The "rule of thumb" is 300 milliamps (or 0.3 amps). This is where you have a problem. Anything less than this is not a problem and is not the cause of your dead battery. My experience is that most vehicles built in the last 15 years or so, will usually measure around 150 milliamps if there is no aftermarket equipment installed. Please note that even this 150 milliamps will measure as 12 volts if measured with a volt meter. A 2 amp draw will also measure as 12 volts....However, a 2 amp draw will kill your battery overnight and the 150 milliamp draw won't.
Just get a generic charger from EBay. They may be available elsewhere. Get a 12 volt 500-600 milliamp one or if you know the exact milliamps for your charger, use that number. Here's a link to one on EBay.
What I did with mine is check eBay for a 12 volt, DC LCD monitor adapter. These normally have sufficient amperage to handle these players.
I did a search on eBay today using search phrase:
"new power supply ac adapter for LCD monitor 12v 5a"
and came up with one for about $14.00 with shipping. You will need to check the plug when you get it and, if it does not fit, get one from Radio shack or, as I did, cut one from an old adapter I had laying around.
Most of these units require that the positive side goes to the center conductor of the plug (check the diagram on the player case over the plug to be sure) so make sure you set it up the way the diagram shows or very bad things will happen to your player.
You may be able to find a 12 volt adapter at Radio shack or somewhere else but these units need (according to the specs) about 1 amp from the supply to work and charge correctly. You "may" be able to get by with an 800 milliamp supply but I have not tested this.
They run @ 12 volts 850mA. So an adapter with center pin positive at around 1A(1000mA) would give it enough "headroom". This means it would run cooler and last you longer. Amperage consumption is determined by the power it is producing, how loud you are playing the setup.
This monitor requires a power supply with a POSITIVE tip polarity. Monitor requires 12 Volt DC @ 3.3 Amps output. Make sure voltage is 12 Volts DC [absolute requirement]
Power Supply can have greater than 3.3 Amp capacity. More amp capacity increases price, so I wouldn't go for more than 5 Amps [minimum 3300 milliAmps, 5000 milliAmps will be more than adequate].
Put a surge protector on your computer and monitor to extend their life....better yet, a power conditioning battery backup system, that can supply constant voltage, to compensate line voltage when A/C, furnace, or other major appliance kicks on.