Can't find the good relay

[ElectroNewby]

I'm looking for this View attachment 68425 but with a 120VAC coil.
I don't want those big relays with a base, and I'm sure there are 120vac-coil mini-relays ?
Can't find on ebay ;(

 

[Menticol]

Plug it to mains using a wall wart, 120VAC to 12VDC.

 

[ElectroNewby]

it's actually a good ideau howerver a wall wart takes up a lot of space and I want the whole thing to fit in those metal boxes you use to fit light switches/electrical outlets.

 

[Inquisitive]

You may need to consider an ice cube style. Put it in a 4" x 4" box.

Something like this?

IDEC - RH1B-UAC120V - POWER RELAY, SPDT, 120VAC, 10A, PLUG IN

just a thought.

 

[canadaelk]

In stock at Digikey: https://www.electro-tech-online.com/custompdfs/2012/11/2961516.pdf

 

[Menticol]

If for some odd reason you can't get the relay, try this transformerless emergency light. It even uses the same 9V battery that you wanted.


View attachment 68430

 

[()blivion]

The OP *COULD* try his hand at a "transformerless power supply". They are simple, small, and he/she won't have to buy a new relay. However...

THEY ARE QUITE DANGEROUS IF YOU DON'T KNOW EXACTLY WHAT YOU'RE DOING. IF YOU TRY IT AND KILL YOURSELF, OR BURN YOUR HOUSE DOWN, OR ANYTHING ELSE BAD HAPPENS, IT'S NOT MY FAULT. YOU CAN'T SUE ME FOR TELLING YOU.

Edit: Transformerless power supply's are also wasteful and can't power very big loads. Better options are available, this one is just simple.

 

[ElectroNewby]

The OP *COULD* try his hand at a "transformerless power supply". They are simple, small, and he/she won't have to buy a new relay. However...

THEY ARE QUITE DANGEROUS IF YOU DON'T KNOW EXACTLY WHAT YOU'RE DOING. IF YOU TRY IT AND KILL YOURSELF, OR BURN YOUR HOUSE DOWN, OR ANYTHING ELSE BAD HAPPENS, IT'S NOT MY FAULT. YOU CAN'T SUE ME FOR TELLING YOU.

Edit: Transformerless power supply's are also wasteful and can't power very big loads. Better options are available, this one is just simple.

You're right, precautions must be taken when building stuff. But well, what could happen with your schematic if it's plugged in parralel.. will take its own current and won't burn, right ? ;P
Would not opt for this tho, but thanks it might come handy for another application one day!

Here's what I'm doing:
View attachment 68466
One super bright LED, a 9V battery, a resistor, a switch (used on the 9V side) and a relay. All safely mounted in a switch box.

In stock at Digikey: https://www.electro-tech-online.com/custompdfs/2012/11/2961516.pdf

This is actually the exact thing I was looking for.
The coil side says nominal values are 120V and 5mA, so I won't actually see any rise on my electricity bill..great !

 

[ElectroNewby]

I'm trying to find the relay on ebay but have no luck
On digikey, it's like 20$ to ship here (Canada) ;(

 

[panic mode]

what do you need for contacts? what type of load you are switching?

 

[ElectroNewby]

9V DC 20mA max

 

[panic mode]

it is not very common to use 120V to control something that runs from 9VDC, usually it is DC circuit controlling AC loads...
this is very small load, normally you would power it from AC. when power is not present, device does not work. can you elaborate a bit more? what kind of device you are building? what is the application?

 

[canadaelk]

So why not an opto isolator like an H11AA1 with a 4700/5W resistor on the AC input? E

 

[ElectroNewby]

Oh, I didn't realised I didn't say what it was for.

I just want to have a super bright LED to turn on automatically in case of a loss of power.
The LED is mounted as on the picture, the switch is to turn it off (if we decide to light candles or something).

So this is why the relay... when losing AC, the relay makes contact so the LED lights the room.

 

[4pyros]

You should run this off a transformer for isolation. You can use a small one and it should be fused.

 

[ElectroNewby]

Like using an adapter to control a small relay 12V relay (coil) ?

 

[Inquisitive]

Why not just use the right tool for the job?

https://www.exitlightco.com/product/EL-MW.html

 

[ElectroNewby]

It's too intrusive, my led lights the whole living room enough to see where you walk and you don't notice it, it's gonna be right next to the other light switches.

But thanks for the suggestion, I might want one one day
Oh also, the fun of doing it.

 

[panic mode]

https://www.google.com/search?q=nig...357c36b61e0a9d&bpcl=38093640&biw=1241&bih=615