12V input DC/DC Converters off-the-shelf and custom

Connection diagram The charge current depends on both the car voltage and the state of charge of the battery. When the car is running the blue curve applies. Questions and Answers 1. My application needs more pass-through current, what can I do? We have a new module with power up to watts. Click here for details. When the module turns off because both batteries are below their set points when does the module turn back on. The module turns back on only when the car’s voltage is restored to the proper charge voltage. A new auxiliary battery won’t turn the module back on.

wiring a computer fan to cool amplifier

There is still quality control and standards manufacturers and importers have to meet in order for product to be allowed to be sold here. You can bet your butt that if Walmart sold one of these and it hit the news that it caused a fire, the very next day, all that product would be off the shelves and that supplier blacklisted. By ordering direct from China you are bypassing those checks and balances that filter out a lot of these dangerous goods from the more reliable goods.

I’m not so naive to believe it’s fool proof and none of it makes it into North America, but by ordering direct, based on price, you’re not exactly skewing the odds in your favor. I guess you have to do your research.

Hooking Up 2 12 Volt Batteries In Parallel 12v Battery Cable Extender Hooking Up 2 12 Volt Batteries In Parallel Tips And Tricks For Used Car Buying Can Laptop Batteries Be Rebuilt Dewalt Battery Rebuild In Syracuse Ny Effects Of Bad Cell In Car Battery Hooking Up 2 12 Volt Batteries In Parallel Price Of Car Batteries Going Up Tips And Tricks.

Car Audio Capacitor Installation There is often a lot of confusion on how to wire a car audio capacitor a. There are two terminals on a car audio capacitor. A positive and a negative. The negative terminal is connected to ground. See the diagram below. If you have a third smaller terminal it is probably the remote turn on for a digital display. This will cause your amplifier’s power supply to be cut off. The power capacitor acts like a small battery power storage so it is connected as shown in the diagram.

The downside of this type of connection is you don’t know if the power capacitor fails since the amplifier will continue to work with or without a working power capacitor. Ideally the power capacitor should be as close as possible to the amplifier. Within a couple of feet is acceptable. This keeps any cable losses to a minimum. To learn more about how car audio capacitors work click here.

Here’s how to wire two capacitors in a system.

How to charge the battery with a dc power supply?

The voltage and polarity of the power supply must match. Amps and watts have some flexibility. Both units are The short answer is that you may be able to use that watt power supply with your new machine, which came with a watt supply, if a couple of conditions are met. Become a Patron of Ask Leo!

So, it is very important that it have a good supply of power. You should use a heavy gage wire, routed to the vehicles + positive battery post. It should run directly to amplifier for proper power distribution and maximum current draw if required.

Kool Kats Fly RC!! Originally Posted by abenn Even though you measured or it specifies How far it drops depends on the charger and on how many amps the load is. Your Multiplex may be more sensitive than your GWS so far as input voltage is concerned, or it may simply be taking more amps so that the car charger voltage is dropping further. I used to use a car charger connected to a smallish car battery as my 12v source for my plane charger. But when charging a large battery I would eventually get an “input voltage error” message as the car battery ran down and the car charger was unable to keep up with it.

My solution was to buy a ProPeak stabilised 20A supply unit http: Its voltage will not vary significantly whatever amps you ask it to deliver within its limit.

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Personal mobile devices are increasingly becoming more than just devices for voice communication as they have a multitude of features including connectivity, enterprise, and multimedia capabilities. Another growing application area for personal portable devices is entertainment. Portable music has improved significantly since the days of the cassette tape; a collection with hours of music can now fit inside a shirt pocket. In addition, gaming devices provide portable entertainment.

Portable gaming devices were pioneered by Nintendo with the Gameboy.

Using PC power supplies in things other than PCs. Before considering using a PC power supply in something other than a PC, you’d better read about overloading, crossloading, and minimum loading in PC PSUs. Grrrrrrr!

The final article covers all the other O2 Details , options, and a detailed circuit description. These guys have solid numbers, math, measurements and science on their side. Many have published multiple books, papers, technical articles, etc. Their work has been extensively peer reviewed and has stood the test of time. So, rather than go off and try to re-invent the wheel as many DIY and audiophile designers seem bent on doing, I liberally took advantage of their well proven research.

So to all of the guys above: An amazing number of audio designers apparently think they know more about audio performance than the component manufactures and sometimes the guys in the paragraph above as well.

How to Install Your Own LED Light Strips

Ask Question Step 3: I decided to not cut up my PSU cables as i may need the computer it came from at some point, you will need to find the pins shown in the pic, they are on the connector that was originally on your motherboard, the cables should be green and black, any black ground connector will do the trick. Now a quick check, turn on your PSU and if the fan spins you’re all set for the next step. Add Tip Step 4: Wiring Your Amp So you have your amp ready?

The JTB Power Solution is a power management tool that allows you to use the typical RV hook-up (30 amp main service with auxiliary 20 amp circuit or GFCI) to power appliances in your RV. The JTB Power Solution is automatic, so there are no switches or meters to monitor.

The answer ended up being a bit long, so I’m giving it its own page, rather than putting it in one of my serried ranks of letters columns. Something as beautiful as my original DIY UPS would, of course, be cheap at any price, but the thing itself didn’t cost me much. I had almost all of the bits sitting around already, and a local battery place gave me the slightly used fancy battery. This knowledge, of course, doesn’t help someone who’d like to build something like that for themselves.

But that piece is five years old, now; the build-from-scratch price today would be cheaper than it was then. And, because proper UPSes or SPSes , anyway are now also cheaper than they used to be, there are some good options out there for happy hackers who’d like to get a good standby power solution together on the cheap. But you can make a practical standby power unit on the cheap, if you start with a standard UPS with dead batteries.

Today, lighter, cheaper and more efficient switchmode inverters are standard electronics-store products. You don’t have to worry about an inverter’s output waveform for computer-powering purposes, because computer power supplies don’t care.

Chapter 1 – Introduction to Power Management in Portable Personal Devices

Scissors or knife for cutting the power cable Optional: The power supply that we are using is manufactured by the company that makes the LED strips we’re using and is designed specifically for the strips we are using. As you can see in this picture it is a 12V 18W supply with a 3 wire input. Those three wires are the standard AC power connections you find in most homes at least in the U.

Those lines are ground, live or hot , and neutral.

This 24v power supply made an amp that I already loved sound even better and gave it even more power. It now plays as loud as I could want from an amp especially when paired with my subwoofer through the speaker level inputs.

PC PSUs are awfully picky about what kind of load they’re willing to power. If there’s anything weird about them then the manufacturer tells you. And usually there’s nothing weird. And the crummier ones can only run a certain range of PCs. Real PSUs are general purpose devices which try very hard to supply a dependable voltage regardless of the load. That’s why real PSUs at least the good ones are much more expensive.

PC PSUs are actually very impressive at delivering watts on the cheap and cramming it into a small space at a very low price. So suppose that you build electronics projects and you would like to use one of those relatively inexpensive, diminutive PC PSUs rather than the larger, more expensive “real” PSUs. As long as you can deal with the PC PSU’s persnickety loading requirements then it’s easy enough to use one. The ATX power supply design guide gives the general specs.

Keep in mind that cheapy PSUs don’t always follow them to the letter. And lots of them don’t follow the VA per rail limit. The ATX connectors are easy to get. The 4 pin 12 volt , 8 pin EPS 12 volt , main 20 pin , and main 24 pin are all Molex mini-fit jrs.

Convert an ATX Power Supply Into a Regular DC Power Supply!

Charging with a Power Supply Learn how to charge a battery without a designated charger. Batteries can be charged manually with a power supply featuring user-adjustable voltage and current limiting. I stress manual because charging needs the know-how and can never be left unattended; charge termination is not automated. Because of difficulties in detecting full charge with nickel-based batteries, I recommend charging only lead and lithium-based batteries manually.

Lead Acid Before connecting the battery, calculate the charge voltage according to the number of cells in series, and then set the desired voltage and current limit.

Use the stereo RCA jacks to connect directly to a CD player, connect your smartphone wirelessly via Bluetooth®, or go completely old school and hook up a turntable to the phono inputs. Add a subwoofer by connecting to the RCA preamp outputs for even more room shaking sound.

Head Unit Has No Remote Wire A relatively common problem is installing an amplifier with a factory head unit or other head unit without a remote turn on wire or a burned out circuit. So the amplifier doesn’t stay on 24 hours a day you need a way to turn it on and off remotely. Hence the term “remote turn on wire”. Almost every aftermarket head unit has a remote turn on wire. Some manufacturers call it a power antenna wire.

But regardless of the label all it does is output a positive 12 volts when the head unit is turned on. It should be noted that some head units have both a remote turn on wire and a power antenna wire. It’s important to use the right wire for your amplifier and other electronic equipment. In the case of both remote and antenna wires the power antenna wire will only output 12 volts when the radio is on.

How to power a car amplifier with a laptop charger