Miniature Monitor Help

[Mr_Burns]

Hi,

 

I bought a 3.5" from ebay, 9-35v.

 

I then bought a 4.5" at 12v

 

Neither of them came with a plug and transformer so I reused other adaptors with similar voltage ranges.

 

I had them both working for a while but once incorporated into my panels, they dont work.

 

I am no electrician so I fked around with various plugs and adaptors and possibly reversing polarity, the biggest was a Dell laptop transformer (19v) and the least was a 1a 5v modem Power supply.

 

As probably expected with all this noncence, neither work.

 

Being as though the max voltage I ever ran through them was less than 20, (I havnt got a clue about amperage), is it likely I have fried something and should throw them away?

 

Is there anyway to test these little monitosr?

[MTFDarkEagle]

Hi,

 

It's quite possible you burnt through something.

I don't know how one could test these monitors, best contact the manufacturer.

[JG14_Smil]

You can never assume your polarity is marked correctly. I had a power supply that had wires marked wrong before. Get a Multi meter and learned how to test the polarity.

 

Back when BS first came out I messed with a small monitor and ended up letting the smoke out of it. I vowed to find easier ways and now use a panel over a larger monitor.

[Mr_Burns]

Thanks for your replies - they were only cheap so i'll prolly wizz them.

 

Beggining to think a touch screen is the future, i enjoy building panels and practicing electronics with switches and solder and stuff but I just dont have the finess.