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5-16 VDC Linear DC Voltage Power Supply Kit
is there a way to safely test if this is assembled properly?
I ordered and assembled one of these power supplies, and as soon as i plugged it into the wall there was a loud pop and one of the parts blew off. I will be ordering another one as i don't give up that easily, but if this trend continues I will have spent as much as a pre-built power supply!
The first thing you should do is study and diagnose what went wrong with the power supply you just built. Some basic techniques are:-- Examine everything with a magnifying glass.-- Use an ohm-meter to detect shorts.-- make sure you were obeying the instructions properly with respect to input voltages. -- this is a regulator, not a full stand-alone supply. You need an off-line transformer in front of it with a maximum voltage of around 24vAC. (preferably no more than 16v). DC can also work in a pinch.A more useful part for U2 is the LM317.
Date published: 2012-04-16
Will this handle a 3 amp load?
I'm building a project that has a 12vdc motor that operates @ about 2.3 amps with a peak draw on startup of 3.0 amps. I will use the 5v output to power an LCD display/counter. Is this unit heavy enough to withstand these loads?
This power supply is basically a battery eliminator and as such it lacks the capacity to handle a motor load of 2.3 amps continuous. This power supply might be sufficient to power your LCD display, depending it's size. Smaller displays require fractional amp current but large color displays can require 1 - 2 amps and this would also be too large of a load for this power supply.PE does carry a power supply that is part # 120-532 (below) this supply would be sufficient to handle your motor and could be regulated by various methods if the 12 VDC output is too large for your motor.
Date published: 2012-04-12
where do i find instruction manual
This was supposed to be included with my order, but was not. I am a a beginner and don't know where to begin.
There isn't really an "instruction" manual available for this device, per se. One can think of it as a "paint-by-numbers" sort of thing. There is a list of parts, here:http://www.parts-express.com/pedocs/manuals/320-324-sure-electronics-ps-lp11111-manual.pdfThe PCB is marked on the top side to indicate the location of each component. Using the parts list to identify the individual components, one would simply place the leads for each component through the holes in the corresponding location on the PCB, very carefully apply solder from beneath, clip off the excess leads, and voilà! You can also refer to the pictures on the product page if you're unsure of a certain component, as to where it should be placed, or how it should be oriented.
Date published: 2012-04-16
I have a 18 volt ac transformer would this work good on this and give me enough amps to run a small amplifier
If you are using 2x 4 ohm speakers for 2x5W you'll need to push 2x5W = 10W = P = I^2 x R = I^2 x 4. So I = (10/4)^-2 = 1.58A. For 2x 8 ohm speakers for 2x5W you'll need to push I = (10/8)^-2 = 1.12A. The latter will probably be more do-able since the voltage regulators of this TO-220 type will be able to push about 1A.
Date published: 2012-06-01
What is this? Does this come with a wall wart?
Does it convert AC 120v to DC? If I just wanted to create a control circuit with a SPST switch and an led indicator to signal 3 DPDT relays, do I need something like this? (PS the relays are used to switch A/B speakers) Would I want to use this if I anticipate trying to at some point add IR receiving capabilities instead of the switch? Thanks.
No, a wall wart is the power supply. It contains the transformer, diodes filter caps,etc. This kit is more sophisticated and is variable. You assemble it and it plugs into an AC outlet with an electric cord.
Date published: 2013-03-14
Can this unit just be hardwired to a power cord and plugged into a socket? Or is the 120 v too high a load? Does one need a 16V wall wort to power this? Or does it take the place of the wall wort?
The input for this power supply is 7-25 VAC or 7-30 VDC.
Date published: 2013-08-22