darryl said:
Okay, I give up. I've been researching this for days. Electronics are so confusing to me for some reason.
Found this:
http://www.allelectronics.com/cgi-bin/item/MK-44/305/10_CHANNEL_LIGHT_EFFECT_GENERATOR_.html
I think I can assemble it, but can't find any info on how to wire the relays neccesary to switch on 120v lights. I understand they are basicly a switch but what do I mount them on and in what way do I wire them?
Another alternative is to wire up 12v LED spots and not even use 120v spot lights, but I don't think these will be bright enough to light up the front of my house. Maybe a combo of LEDs for individual props and realys for spots on house.
Any diagrams or explanations? Thanks in advance.
Darryl,
What are you trying to do? I understand you want to turn on 120VAC Spotlights. What are you trying to control them with? You usually use a relay if you want to turn on an AC source with a DC control. Example: turn on 120 VAC lights with a 12 VDC control. If this is what you are trying to do, you would want to use an "
Ice Cube Relay" with a "
Panel Mount Relay Socket".
There are a few important things to know about relays in general. The coil type, the contact type, and the contact rating.
The coil is what "energizes" or "turns on" the circuit. A 12 VDC coil will require a 12VDC source conntected to the coil to "turn on" the relay. A 120 VAC coil will require 120 VAC connected to the coil to "turn on" the relay.
The contact type, is what type on circuit you want to have. There are many types. SPST (Single Pole Single Throw), SPDT (Single Pole Double Throw), DPST (Double Pole Single Throw), DPDT (Double Throw Double Pole), etc. A "Single Throw" N.O. (Normally Open) circuit is probably the most common. The circuit is N.O. (Normally Open) and when the relay is "turned on" (coil voltage applied), the circuit (relay contacts) closes and turns on. There is such a thing as a "Single Throw" N.C. (Normally Closed) relay. The circuit is "Normally Closed" or "On' when the relay is "Off" (No voltage applied to the coil of the relay) and when the relay is turned on (voltage applied to the relay coil) the circuit (relay contacts) turns off. A "Double Pole" relay has both a N.O. (Normally Open) contact and a N.C. (Normally Closed) contact. Double Pole relays are much more flexible, but usually a little more expensive.
The last important thing to know about a relay is the Contact Rating. This tells you what type of "load" you can connect to the contacts. A 120 VAC 5 Amp contact rating means you can connect at most a 120 VAC voltage circuit with a 5 Amp draw (600 Watts). A 12 VDC 10 Amp contact rating means you can connect at most a 12 VDC cirucit with a 10 Amp draw (120 Watts). These are usually used in automotive applications.
The relay link I gave you above, is a Four Pole Double Throw Relay with a 12 VDC coil. With this relay, you can contol up to four spot light circuits with a 12 VDC coil voltage. The contact rating is 5 Amps at 240 VAC/28 VAC meaning you can connect a 1200 Watt AC load (at 240 VAC) or a 140 Watt DC load (at 28 VDC). You can connect a 120 VAC load to this relay. The 240 VAC rating means you can connect at most 240 VAC. The current rating will not change however. You can only connect a 600 Watt load at 120 VAC.
The panel mount relay socket will allow you to connect the socket to a panel (or a piece of wood) and then use screw terminals to connect to the relay.
I know this may be a little confusing, but I hope this helps.