I what to use 30 or so microcontrollers as timers all hooked up to the same 24 VDC power line spaced 30 or so feet apart in one continuous chain. To control what we call a mine run. I want them all to have power all the time and wait for a signal to start a user selectible time delay. The 1st one will get a signal from a firring sytem, wait .05 to 1 sec. and send a signal to the next timer to start and so on.
I am thinking of using a form of a bias tee. With inductors passing DC down the line and isolating the control signal, but I am not shur of the best way to couple a signal to and from the microcontroller to the DC line. Can I just use a cap from the DC line to a microcontroller pin? Will I need a transister to drive it? Will I need to use a transformer?
Any thoughts on this holiday break?
Is thare a better way?
Marry Christmas.
Andy
I am thinking of using a form of a bias tee. With inductors passing DC down the line and isolating the control signal, but I am not shur of the best way to couple a signal to and from the microcontroller to the DC line. Can I just use a cap from the DC line to a microcontroller pin? Will I need a transister to drive it? Will I need to use a transformer?
Any thoughts on this holiday break?
Is thare a better way?
Marry Christmas.
Andy
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