i have a 12 volt 4 amp power supply, made or sold by cpi of houston texas.the #is unc 4000. need schematic or?
86464
I'm afraid there are none such available except by the company that sells it. Try them, or do it yourself.
341482
Ok break it down:\n1) A power supply converts AC power (110 in the states) to some other required voltage. For this (lab) project I'd presume a DC regulated voltage from, say 1.5 to 15V something like that.\n\n2) Digital and programmable means you'd control the output voltage with some sort of digital signal like up/down buttons, a keypad, or a PC hookup.\n\n3) You are supposed to use an 8051 to accomplish this.\n\nSo there are several ways to do this. One way would be to have the 8051 accept a command to set the voltage and produce a PWM signal. Let's say the PWM signal is a 5V output switched from 0 to 100%. You can use an RC filter to produce 0V to 5V from this signal. If your instructor is nice, you could argue that this meets the criteria -- especially if you use it to drive a pass transistor to develop some serious current (but your voltage is now 0V to 4.3V because of the BE drop).\n\nBut I'd instead use an op amp with gain X3 (plus a little extra) so that I got from 0 to 15.7V and then use the pass transistor. Another idea would be to use the voltage to drive a simple current source which would program a LM317 voltage regulator.\n\nWeb searches on things like LM317, PWM, and "pass transistor" are your friends here.
186229
Here are some sites that may help.  Both have circuit examples utilizing LVDT's.  Hope this helps.
705994
If its a part number, a simple google search with this number should show results...otherwise bring it to a local computer store and ask them what you have. Dont worry about feeling stupid. This is actually a very intelligent question.
129665
A power supply needs a "load" to run,,I.E.  all that stuff in the computer box.  Some have internal fuses that will blow and you have to open the supply box to check,,There is a 110/220 switch that may have been moved,, I have never had one that I had to mess with jumpers,,  yes, a factory defect is possible,, cold solder joints on large components are quite common coming out of the factory..
247015
I heard that at least once upon a time you could only get Dell power supplies that work with Dell Computers. I know this was definitely true for Compaq. If you got the replacement part from Dell it would most likely cost a fortune. Open the case and find out the wattage. Is the case a Micro ATX, or an ATX (Basically itty bitty case or big case) Is the power supply up near the top like "normal" computers or weird and sideways.\nI would saya if the power supply is 250 watts or more and is in a standard computer spot it probably is a standard ATX power supply. you can look on Newegg.com for a bunch.
689831
Go to the APC site and enter your exact configuration and they their site will tell you exactly what you need to order. \n\nI ran your approximate configuration and got this answer\nAPC Smart-UPS XL 2200VA 120V + (2)SU48XLBP Battery Unit\n$1900 as the best option. They also had a less expensive recommendation. But you need to run the configuration yourself, because you did not provide all of the information that is needed to configure the UPS.\nBut you
827069
The meter should have some literature with it.\n\nWrite to the manufacturer and ask for it.
117708
P/N: 43-56P01-160 = http://www.laptoprepairco.com/itemdetails/itemdetails.asp?ref=741&category=cables\n\nP/N: 43-56P01-170 = http://www.laptoprepairco.com/itemdetails/itemdetails.asp?ref=1146&category=cables\n\n\nthey are two parts of your laptop lcd. contact your manufacturer for details
123471
Go to ThomasNet.com, which is a comprehensive directory of industrial manufacturers and suppliers. Searching for "electrical supplies" yield 6,379 results, and each result includes company description, contact information, website address. Browse through the results and contact the companies that you think would provide you with what you need.\n\nHope this helps
821020
Each should be marked with a Vector Group Reference.\nThis gives phase angle and lead or lag angles. \nThese should be matched before connecting them.\nAfter connection the load should be introduced to the board in synchronism with the supply.
1185964
Have you the original lead?...if so you'll be able to get the power rating etc and see if your local electrical retailer can help.
736596
It depends on the current.  You want to drop 6 V across the resistor to get the voltage to the load to 6 V.  The voltage drop across the resistor is V = R*I.  The resistor value you need is R = V/I.  Once you know the resistance, you need to determine its power rating.  The power dissipated in the resistor is P = V*I, where V is the voltage across it and I is the current through it.  Or, you can use P = (I^2)*R.  You should choose a power rating at least 1.5 times the power you've calculated so it doesn't run too hot.
275873
The Heath AC voltmeter is illustrated in the link.  Click on the diagram to enlarge it.
932368
you will have to change the propriatary power supply out also\nwww.tigerdirect.com
865571
That should be a $450 -$550 amp new.  You should be able to get $250 - $300 since it is clean and hardly used.
700354
Since you have no contact info, I have no other choice...\n\nIn reference to http://answers.yahoo.com/question/index?qid=20061115060801AAEHWQA&r=w&pa=FZptHWf.BGRX3OFMhzdTUCYEW59bygAIQoCa4DY8zIlrypTkPQ--&paid=answered#NbUvWju8VzmdRHfXRHQU\n\nYou suggested to the asker to wire his sub to 1 ohm when it clearly states in his question "500 watts X 1 @ 4 ohms". You do realize you told him to blow his amp up by wiring it that way.