How do i adjust voltage to 13.8V DC? I see a small variable resister to the left of the V+ terminals.
181388
VR1 is used to adjust the voltage output. Put a meter on the outputs and adjust the VR1 POT.
181389
to the left of the terminal strip is a variable resistor for adjusting voltage, I have 2 of these units, each goes from around 10.5v up to 14.8v per my DMM.
181390
Just adjust that resister to the correct voltage and it'll hold it extremely well.
181391
Called a trim-pot. Blue with an X slot. Clockwise to increase voltage and inverse to decrease. Incredibly sensitive to the slightest touch. Flip the unit over. See the four tiny screw holes in the corners? M3 thread standoffs will thread into the threads. The unit -must- be elevated to let the bottom vent holes breathe. Be sure the ground terminal is used. My units cases emit 17 to 39 volts potential if left ungrounded. Hope this helps.
181392
Use a flat screwdriver for the resistor you pointed out. I cranked mine up to 13v with no issues. I use about 15 amps for a ham radio transceiver.
181393
yeah, that would be extremely annoying :) I have mine running a PC case fan that blows on it while its on, then the built-in fan never runs, and PC fan is MUCHO quieter.
181394
That would be it! I have mine at 14.8V small phillips head scredriver does the trick, make sur your have your load applied while checking the voltage at the device for voltage drop.
1880696
A brass screw on top of the Blue post sticking up adjusts the voltage, Need a meter to get the right output....very easy.
270634
There should be a switch and the settings marked on the side of the battery enclosure. You have to look closely to see the settings.
685904
I just used a 12v adapter I had lying around. I cut the end off and used a multimeter to make sure the polarity was correct and hooked it to the board. Please, do be careful about the where you put the positive and negative. I remember reading on the net that this device won't protect itself from reverse polarity on the dc voltage. Meaning, the circuit board will be ruined.
2213337
Look closely at the back of the handle.. Small round item with voltages marked in black. You'll probably need a small or medium flat tip screwdriver. (I think Alicia might've misunderstood..)
2245200
My kill-a-watt reader reads 7W at 122.5V, which is also in line with what other reviewers have mentioned, so, the 9W designation is correct, 13W is definitely out of line.
1664161
Use a multi meter to measure the voltage at the output terminal while you are adjusting the voltage. The input voltage just need to in the range of the specifications.
1555303
Sounds like the input voltage is wrong (ie, the adapter is putting out the wrong voltage).
663933
In practice these things are pretty robust. As long as you do the adjustment while there's no output load (just your meter connected) and don't exceed the maximum rated input voltage, you're unlikely to fry it.EDIT: It sounds like one blew up on you, sorry to hear that. This is surprising to me, since the LM2587 has undervoltage lockout. I bench tested this for my application (dropping the input voltage until the thing turned off) successfully several times under 10W load.
802832
mine only has 24v output. there is a small pot that can be used to adjust for fine tuning.
2165541
This is probably too obvious and may not be helpful, but you need to adjust the current as well as the voltage. When I first started using this power supply, I had a similar concern, but found that adjusting current before voltage helped. Sorry if this is not helpful.
185470
Hello, there's customer not measuring voltage use high voltage and damaged the bulbs ,DC12V Bulbs Burned when last long time input high voltage , we received some Burned bulbs so have to add a notice to recommend, some new RV over 13.5v or 14V ,can select our GRV brand AC or DC 12~24V LED bulbs if not sure the input voltage,thanks!
917131
I suspect if you could adjust how much voltage is going to it, you could make it adjustable, but I have no idea how you would go about adjusting the voltage. I use a computer controller that turns it on and off as needed to maintain a set temperature.
2231649
I use a generic one, with interchangeable connection pins and variable voltage (but fixed 3A). Set it to 9V, center pin positive connection, and you're ready to go. I'm pretty sure you can find one here.
1221680
Hook up negative wire to terminal. Than touch the resistor to terminal and hold the other side of the resistor to the battery positive wire till the cap. Reads your battery voltage .. around 12 volts.. when it reads battery voltage than hook up the positive wire to cap. Terminal
1340726
Hi, I see it marks on the bottom of the lamp: DC adapter 4.5V 1.5A Hope this helps you. Adapter not included in the box.
853541
Well, current will depend on the draw of what you are connecting it to. you could put an inline resistor if needed. To control the voltage, you just turn the pot screw until the meter reads the voltage you want. you could do 12 or 18 volts with a turn of the screw driver. basically, this should do exactly what you want.