Hi everyone,
First off I apologize if the subject heading of this post is misleading, for some reason I'm having difficulty articulating my question...
I'd like to use three different microcontrollers, each with their own timers, to activate a single load. Each one is basically a fail-safe should the previous one not work as planned. They are all powered from different voltage sources. I'm just wondering how to connect them all together in such a way that they won't damage each other. Here's a my best block diagram in text form:
A - - |
B - - | LOAD
C - - |
If any of the three goes high, the load is activated. Again, they're all powered from different voltage sources. Oddly enough it doesn't really matter what the voltage of the load is (sounds weird I know).
This seems like some very basic stuff but I'm difficulty wrapping my head around it for some reason. Even if someone can let me know how to research this kind of circuit, it would be most appreciated.
First off I apologize if the subject heading of this post is misleading, for some reason I'm having difficulty articulating my question...
I'd like to use three different microcontrollers, each with their own timers, to activate a single load. Each one is basically a fail-safe should the previous one not work as planned. They are all powered from different voltage sources. I'm just wondering how to connect them all together in such a way that they won't damage each other. Here's a my best block diagram in text form:
A - - |
B - - | LOAD
C - - |
If any of the three goes high, the load is activated. Again, they're all powered from different voltage sources. Oddly enough it doesn't really matter what the voltage of the load is (sounds weird I know).
This seems like some very basic stuff but I'm difficulty wrapping my head around it for some reason. Even if someone can let me know how to research this kind of circuit, it would be most appreciated.
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