A) I have a circuit that activates at 1VDC input and deactivates at 12VDC input.
B) I have a 12VDC input that will start at 1VDC and, after a second or two, change to 12VDC. Sometimes it stays at 1VDC. This input is currently connected to A.
C) I have a 12VDC input that will start with an open circuit and, after a second or two, change to 12VDC.
I want to build a circuit that takes B and C as inputs and delivers 1V or 12V to A from either input. This seems like an OR gate to me, something like this:
It looks like the diode model is the easiest but it's been many years since electronics class in high school so I don't understand how the circuit works.
B) I have a 12VDC input that will start at 1VDC and, after a second or two, change to 12VDC. Sometimes it stays at 1VDC. This input is currently connected to A.
C) I have a 12VDC input that will start with an open circuit and, after a second or two, change to 12VDC.
I want to build a circuit that takes B and C as inputs and delivers 1V or 12V to A from either input. This seems like an OR gate to me, something like this:
It looks like the diode model is the easiest but it's been many years since electronics class in high school so I don't understand how the circuit works.
- Combining two 12V inputs will produce 24V, will it not. Why will this diode circuit not pass 24V to the output?
- How do I determine the size of the diodes and resistor?
- What is the size of the resistor and why do I need it?
- Will this circuit pass the 1V input to the output as well as the 12V input? If not, how do I need to modify it?