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Good day, this is a quick one.
I need help building a relay which can be activated off a very low voltage, I'm talking 1.5vdc-5vdc range of activation.

We have some item's which presently light an LED and we would like to light 120vac item's with the signal.

I've got plenty of background in soldering and such but never got into the design side, So assembly is no issue.

A diagram and part's list for what I need to order off www.digikey.ca would be all I need.

Please let me know price for this design.

Thank You

All you need is a microcontroller and a 120vac switch :D you MUST wear rubber gloves or you might die from electrical shock (even if its not plugged in) by the capaciters... here is a list of parts/stuff:

loose search terms: https://www.google.com/search?q=120v+relay&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
exact spec match: http://www.digikey.com/product-detail/en/ORWH-SH-105H3F,000/PB1134-ND/1739524
http://www.pcslighting.com/simpleworx/products/receivers/plug-in-modules/pmr-ac

tutorial: http://blog.thelifeofkenneth.com/2010/01/switching-120vac-with-5v-digital-logic.html

Let me know how that goes :D and if you need more information I'm a pro at this stuff, plz tip :D

Not much for caps in that tut.
I have those. Built that. But was unsure if it could be switched by 1.5vdc. I know the power for the relay needs to be 5v or greater. But can the switching side of the relay be as low as 1-1.5v?

Thank you. I could never find a tutorial fir what I built. Was looking for s ready to use device. The legs on those little relays. Are so tiny. Lol

Bump this up, I'm trying to find the part number for these screw down terminals, the blue ones that take three wires? preferebly a larger type that can take house wire, and a smaller version for small wires?

http://i.ebayimg.com/00/s/NzM3WDczNw==/z/sgkAAMXQu8ZRPTiQ/$T2eC16ZHJF0E9nmFStGeBRPTiP7Rsg~~60_12.JPG

There's a very large selection of terminals of that style. Here are ones that look similar:

http://www.digikey.com/product-detail/en/1776244-3/A97997-ND/1826860

For larger gauge wire, try something like these:

http://www.digikey.com/product-detail/en/796740-3/A98276-ND/1827129

If you're still looking for information regarding the relays... the voltage needed to switch the relay (the control side) is called the "coil voltage", and you can search relays on digikey by this property. The electricity you run through the relay (not the coil) can be at any voltage/current, AC or DC, within the specified ratings of the relay.

The relay linked by Xenland is a nominally 5V rated relay. If you look at its datasheet, its coil can be controlled by voltages as low as 3.5V. If you need voltages lower than that, the lowest voltage power relays on digikey currently in stock appear to be these:

http://www.digikey.com/product-detail/en/TX2-LT-1.5V-TH/TX2-LT-1.5V-TH-ND/2709469

You can drive their coils with voltages as low as 1.125V.

Another important property of relays is whether they are form A, form B, or form C. Form A relays are normally open, Form B relays are normally closed, and Form C relays have 3 pins: a common, a normally open, and a normally closed pin. To understand the terminology, normally open means that the relay does not conduct when the coil is unpowered, and conducts when the coil is powered. Normally closed means the relay conducts when the coil is unpowered, and does not conduct when the coil is powered. Make sure you know which you need for your application and how to wire it up correctly.

Let me know if you need any assistance with your design.

Thank you sir, that relay may be what I need and save me all the word, hmm
As for type's I was aware of the type never knew what they were called,heading to your thread now as I have a few circuit designs I may want built.

Glad to help. I will reply to your post on my thread ASAP. Thanks for your interest!