HOW TO BUILD SOLID STATE RELAYS
We would like to point out that in no way are we responsible for the operation of these circuits and they are for you to look at and think about. This is strictly the way we build them. And as always when working with line voltage use extreme caution to prevent shock.I am not responsible if you get shocked.
The diagram is the wiring for a solid state relay that I use. I have had no problems with them. I have used 7.5V and 9 V transformers for the power.
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Bottom left photo shows two ssr's that are connected to a flasher. I put a led on the one input to watch it switch. The right hand bottom photo shows the under side of two differant perf boards from Radio Shack. The terminal blocks came from Radio Shack. These make it much easier to connect and disconnect. The perf boards are from Radio Shack. The optos and triacs I got from All Electronics. These triacs are 6 amp although some are 12 amp.
You can trigger a triac without using a optocoupler. Of course you do not have the isolation feature. The only time I do this is when I want to trigger the triac with 120Volts. This may be done for various reasons. Maybe you want to use the controller from a set af chase lights to control more than one set of chase lights.The diagram shows the wiring connections to the triac. It is VERY important that you follow the power in and power out. Power in is on M2 and power out is on M1. Since a triac can direct current in either direction if you cross these two you will have a continous on triac and may even destroy it. Notice that I use terminal blocks to make it easier to connect wires. I have 2 ssr's on 1 pc board.This is 1/2 of the dual board from Radio Shack. The triacs are from All-Electronics.
DIAGRAM OF 110 VOLT TRIGGERED TRIAC
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