Belles light 2.2

Nevermind on the first part... i isolated it @ the relay throws... but for the second part... still not 100% sure what would be the safest way to mount the light sockets to a metal frame.....

And now reading again i think rubber washers might get to hot ... ? Any thoughts....

Have you seen the chassis that encases the backlight of a LCD/LED TV? Its a sheet metal which is designed to safely conduct heat. The chassis is light and very easy to cut. A hobby knife can score one side and once you have done the other you can literally just bend and/or snap the parts you have cut completely off. I have used this metal to build the enclosure for a speaker

You can literally bend and fold after cutting it any how you want. The sharper the object to cut with he better. Other than that I think Perspex is also safe should you have any lying around

A piece of cardboard should do just fine.

I dont need to know how to cut it... im trying to figure out how to keep it from shorting the circuit and shocking the piss out of me... tvs and stuff like that with metal enclosures have a third prong on the plug that connects the casing to earth ground should the circuit short to the frame... however im using a preexisting power supply that doesnt have an earth ground built into it ... so i was trying to figure out alternatives to safely ground or isolate the frame from the light sockets that will b attached to it... the circuitry itself will be enclosed in a plastic box...

Cardboard.... rly? Smh

Most older lamps use a thin cardboard sleeve to isolate the socket from the socket mount. That being said, if you are using prefab mounted sockets, they should already be properly isolated.

Basically don’t take ANY chances, not if there’s any chance of getting an electric shock. Cardboard is not suitable. A big of damp and it conducts! Perspex would be good, if available. DO earth any metal. I assume you will power from a 3 pin plug.

If you can EFFECTIVELY isolate the metalwork then OK, but washers sound risky. Things can get loose over time and shift - your solution must ensure this cannot happen. Sorry I cannot be more constructive - it’s one of those things where it’s easier if it’s in front of you :-)

..... bit of damp ....

No worrys i understand ... i kinda thought washers were risky too... cant use a 3 prong like i want because the power supply is pre fabbed and no third prong... however they are prefabricated sockets too so maybe its already taken care...

Do you really want to let your daughter touch an unsure homemade electrical device by your mentioned 'using a preexisting power supply i scavaged outta a box of junk' ? ... I suggest that you forget the whole project, or stick to an off the shelf 12v supermarket battery for now. Perspex or cardboard is not much use for heat shielding if that is what you have in mind...and the fire risk is high.... Your level of electronics ability here suggests that you should forget any mains supply and think carefully also about any potential fire risk.

How about redesigning it to run off 5 V and using a USB power supply? I'm with @2ctiby here - using a scavenged PSU is a bad idea unless you know what you're doing, and judging by the nature of your comments about the nature of earth (ground) terminals, you don't.

@tonyinselby. http://everycircuit.com/circuit/5581292160942080 tal ves no sea la mejor opcion pero es la mas barata por otra parte puedes comprar un simple transformador que venden en cualquier sitio de xV:12v.

Perspex was mentioned for electrical insulation rather than thermal. However, I totally agree that caution is called for and safety should be paramount.

@FernandoCPF Lo siento mucho, no hablo español.

First my daughter wont be playing with any lamps period so no worries there... secondly its not a junk power supply its a 12 1A that went to some old router i had hence calling it a box of junk... also the earth grounds on 3 prong plugs are used to ground out metal frames and circuitry should it short internally its a safety precaution ... i been working with electronics for the last 8years... first time fabricating my own but i know more than u guys are giving me credit for... really like the 5v usb idea thanks @tony for the actual help and advice..

@hinds89 .... We can only guess at your electrical ability according to the things you mention. You said that the transformer did not have an earth pin, but you then ask questions about how to earth the unit with a metal backplate. Why would you need an earth at all if there is only a 12v two wire supply from a plug-in-mains transformer? I personally am a qualified inspector of portable appliances (in England) who can be called on to certify factories, hotels, offices and rented premises etc regarding their equipment earthing and insulation. Your uncertainty in the appropriate need for earthing (and its need for testing properly if applied) is bothering me here....sticking to usb or battery in my opinion would be your best bet rather than wiring an untested, unqualified makeshift earth to a mains socket....To properly test a lead which is to be plugged in to a mains socket, a special meter is required....and it should be used before first connecting to the mains. (Google 'PAT tester' ... I use a Martindale HPAT 600).

Not worried ab the power supply... or having a earth ground... and fair enough i shouldve worded my questions better so lemme try again ... i have a metal frame in the shape of an A that i want to attach 8 small bulbs to... what is the safest way to attach the sockets to a metal frame ....? I only brought up the earth ground to state that my power supply doesn't have one so that wasnt an option...

I'm no authority on that aspect (I only test BSI level equipment, and fail it without testing further if it is not marked with a Class number....your mentioned transformer will be marked with a little square meaning it is an unearthed Class II as a matter of interest), but if you are just sticking to non-ground earth and non-mains with a few 12v low wattage bulbs in dry conditions then I would think that anything goes really.... previous mentioned insulation, or new ideas from others are more valid than anything that I can think of, other than perhaps using LEDs for less heat instead of filament bulbs?

Yea i thought ab LEDs too but kinda wanted the soft filament glow... thanks for the input and sry ab the confusion earlier..