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Step 3Materials
Solid-state relays – These are optically coupled triacs with a logic-compatible input. While not a relay in the traditional sense, they do perform the same job. I used Crydom D1225’s for AC switching and D2D12’s for DC. You can find these for $25 on eBay, or it is straightforward and cheaper to build your own from schematics on the web: here or here for example. Also, check out Crydom's CX240D5R. Digikey has them for approximately $12.
Grounded extension cords – One for each AC relay; one should be at least 6 feet long with the others as short as possible because you’ll be cutting them.
Terminal block
Wire – #16 AWG for AC, #22 AWG solid-core for DC and signals.
Breadboard
LEDs
Resistors, 470 – 1k Ohm
24 pin DIP connector
25 conductor ribbon cable
25 contact male D-subminiature connector
Non-conductive base and cover material (I used wood and acrylic)
Wood screws
Cable ties
Stand-offs
Tools
Hand drill and drill bits
Multi-meter
Wire strippers
Hot glue gun – optional
Grounded extension cords – One for each AC relay; one should be at least 6 feet long with the others as short as possible because you’ll be cutting them.
Terminal block
Wire – #16 AWG for AC, #22 AWG solid-core for DC and signals.
Breadboard
LEDs
Resistors, 470 – 1k Ohm
24 pin DIP connector
25 conductor ribbon cable
25 contact male D-subminiature connector
Non-conductive base and cover material (I used wood and acrylic)
Wood screws
Cable ties
Stand-offs
Tools
Hand drill and drill bits
Multi-meter
Wire strippers
Hot glue gun – optional
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