Hi
I am having trouble working out a solution to a control problem. What I have is four (4) inputs needing to control six (6) outputs.
The inputs are, "Zoom", "Focus", "Menu" and "Common".
The outputs are, "In", "Out", "Near", "Far", "Menu" and "Ground".
The two inputs, "Zoom" and "Focus", have momentary switches (normally open) "In", "Out", "Near" and "Far" in that order, corresponding to them. Input "Menu" has a switch aptly named "Menu" and there is no switch with "Common".
Pushing a switch determines the input combination. Example, I push "In", input "Zoom" is 12v DC and input "Common" is ground. All other inputs stay at 0v DC. However there is about 150mV DC on each. Now I push the switch corresponding to "Out", input "Zoom" is now ground and input "Common" is 12v DC, all others are as described as before.
Inputs "Zoom", "Focus" and "Common" have three states each,
12v DC, 0v DC and ground.I have tried using diodes, transistors (NPN, PNP) and have looked at logic combinations until I see 1's and 0's in my sleep. So I have turned to those of you who are more capable then I to solve this problem
Thank you in advance for any insight you may be able to give me.
Thanks, rollajarhead