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Transistor relay with NO and NC?

Does anyone know how to make a solid state relay with a NO contact and a NC?
Does anyone have a schematic?
Thanks.

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Padlock7 years ago
Easy enough. Use two transistors (or SSRs). Attach the base of one transistor directly to the input (with a resistor, if needed), and another, to a NOT gate, and then to the input. (Again, with the appropriate protection.) I'll make a schematic...
Padlock Padlock7 years ago
Pardon my spelling mistake, paint doesn't have a spell check.
Schematic.jpg
thermoelectric (author)  Padlock7 years ago
Ah, thanks. I don't mind the spelling mistake, lol
Take note that common MUST be ground, or at least lesser than the input voltage.
Padlock Padlock7 years ago
Correction: Lesser than the input, NO, and NC voltages, (if present). That means that it won't work with AC, and when put in a electrical path the common must be attached to ground. Put bassically, the current must follow the path of the arrow in the transistor. This also means that the input voltage will be using the common as ground. I'm working on another, more complicated version w/ mosfets that would allow AC, and such.
Padlock Padlock7 years ago
Scratch the MOSFETs, it's easier to do it like this:
Schematic.jpg
thermoelectric (author)  Padlock7 years ago
Ahh, cool
lemonie8 years ago
What is a NO and what is an NC?

L
Normally Open and Normally Closed. Interesting question, I'd say it could be done with gates.
thermoelectric (author)  whatsisface8 years ago
Oh, I'll have to look into gates....
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