Asked in Uncategorized
How can you tell if a power supply is good using voltage?
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Asked in Computer Keyboards
Can you use a 10 volt power supply for a 9 volt keyboard?
Can you use a power supply with more amps and not fry the unit?
you will need to be allot more specific on what you are trying to do here. what is the difference in amps. what is the device Generally speaking it is good practice to only use the power supply that the device is rated for. the biggest issue you will have is this Power = voltage * current (simple version) if the power supply you had was 12v at 1 amps then you ca supply 12Watts of power if the power supply you had was 12v at 10 amps then you can supply 120Watts of power Just because you can supply 10 amps, and all you need is one, means your power supply is bigger than it needs to be. The device will draw what it is intended to draw. Just make sure the voltage matches.
How would you measure the voltage drop across the relay coil?
The voltage drop across a relay coil will be the same as the coil supply voltage. If you are trying to see if the coil is good or not, remove one of the voltage supply leads and check for continuity by using an ohm meter across the coil leads. A reading will tell you that the coil is intact and not open.
Asked in Physics
Do poor conductors produce more heat then the relatively good conductors?
-- If you force the same current through a good conductor and a poor conductor, the poor conductor will dissipate more heat. -- Of course, in order to force the same current through both of them, you'll have to apply more voltage across the poor conductor. -- Therefore, the product of the (supply voltage) and (current) will be greater for the poor conductor. -- The product of (voltage) x (current) happens to be power . . . -- Meaning that you'll have to supply more power to the poor conductor. -- Voila! The extra power you supply is exactly the greater heat dissipation. Once again, you didn't get something for nothing.
Is it possible for a volt drop across the coil to be higher than the supply voltage?
Absolutely. At resonance, if the circuit has a very low resistance in comparison to its inductive and capacitive reactances, then the voltage across the reactive component of the coil can be many times larger than the supply voltage. Good news for electronics engineers; bad news for power-systems engineers (check out 'ferroresonance').
Asked in Computers, Computer Hardware, Home Electricity
How do you know how many hz your power supply has?
In America it should be 60hz. But you can hook up a power meter to the line and find out the real frequency and voltage of the common household or office power line. You may be surprised at the number of spikes and drops in voltage and frequency in a household line. A good UPS can some times tell you as well.
Asked in Computer Hardware
Is the OCZ StealthXStream Power supply good enough for a gaming computer?
Asked in Motherboards
Dave, By the descri?
Dave, By the description of the initial troubleshooting, have you taken the following steps? I apologize if they bave been answered: 1. Have you swapped the power supply with a known good power supply? 2. Have you tested the voltages on the power supply itself? It is possible to test the power supply voltage with a multimeter and the clever use of a paperclip, I can explain more if you wish to pursue this. Additionally, while it is possible to replace items at the component level, e.g. voltage regulators, capacitors, etc, It as Louis R has mentioned, rarely worth the money or time spent. If you have 100% ruled out that the power supply is not the, or at least part of, the problem. I wouldn't recommend repairing in this case. My main reasoning is, that if the power supply did fail and now the motherboard is acting strange, there may be more damage to it than you can see.
You suspect that a power supply is faulty but you use a multimeter to measure its voltage output and find it to be acceptable Why is it still possible that the power supply may be faulty?
Yes, it can be faulty. Some damaged power supplies show good output voltages on the voltage range of a multimeter but, when you connect them, they don't work properly. One possible reason is that maybe an IC in its voltage regulator has a high resistance between the common and the output. You cannot see this by shunting a voltmeter onto it. You have to place a typical load onto the output to test it.
If the voltage in a restive is double the power will be?
In a resistive load circuit, the power = multiplication of voltage and Current. By increasing the voltage power will not be increased. Power is defined by the load as per its design. If the voltage is higher the load current will reduce. However running a load at double the rated voltage is not good for the device. Insulation may fail.
Asked in Computers
What does power supply on a computer do?
A computer power supply takes the AC power coming from a wall socket, and then converts it into lower-voltage DC to power all the components inside. Almost every component of a computer will connect directly to the power supply, with the exception of smaller parts such as fans, which can pull power through the motherboard.
Asked in Electrical Engineering
Why power quality is needed?
Asked in American Cars, Car Batteries
How much voltage does an automobile battery usually supply?
Asked in Electrical Wiring, Physics
What is the difference between voltage and signals?
That's a pretty good question. In computers a change in voltage level is usually the data signal. There are many industrial applications where a change in current is used as a signal. In fact ANY change in voltage or current can be used. Data signals are very weak (high impedance) compared to power supply voltage and currents.
Asked in Computer Hardware, Holocaust, Marijuana
What is the most efficient way to determine whether your power supply is bad?
There are 2 easy ways to check, but both require some extra equipment. The first, and easiest, is to use a power supply tester. If and when you have one, unplug the power, emove the power supply connector from the mobo, plug that into the tester, and the results should be immediate. Most of the testers have different colored LEDs to indicate the results. The second is to connect a different power supply of the same or greater voltage to your computer, if you have one. If your problem goes away, then it was the PSU, if not, keep troubleshooting. Good luck Bob
Asked in Technology, Computers
What component is key to a long life for a computer?
Current will flow as long as the power supply is good and there's a power-control device true or false?
Asked in Computer Hardware
Why is stable power supply needed in a computer lab?
Asked in Electronics Engineering, Electronics
Which material we need to show a 9 volt power supply?
Well it depends on several things, does it need to be AC or DC? how much amperage must it be able to supply? For a very basic power supply you could us: A Step-down transformer A bridge rectifier (4 diodes of sufficient voltage and amp rating) Two capacitors; one at 1000uF and one at 0.01uF A 9 Volt voltage regulator (LM7809 is good) Depending on transformer and rectifier, this'll deliver 9V at up to 1A