Hello all. I'm new to the forum, so thanks for having me.
I'm doing my senior project and am having a heck of a time with what I thought would be a simple sensor circuit. Basically I have 6 photoresistors that are normally getting hit by light from laser diodes. When the beam is broken, the resistance goes up. I've got the output from the photoresistors inputted to the clock pin on a 4027 dual JK flip flop. I've got J tied to 6V VSS, and K, Set, and Reset tied to ground. I can get one side of the JK working just fine. The problem is when I wire up the second side of the JK, I get nothing. The Q output stays low no matter what. When the beam of light is broken, nothing happens. Even when I try a second 4027, it won't work. I can only get one of my JK's to work correctly. No matter what I've tried, I can't get more than one sensor to work. I've got Vss and ground decouple using a 100 μF cap. My power supply is a BK precision regulated bench supply.
I've uploaded a circuit diagram. Any help with this would be much appreciated. Thank you.
I'm doing my senior project and am having a heck of a time with what I thought would be a simple sensor circuit. Basically I have 6 photoresistors that are normally getting hit by light from laser diodes. When the beam is broken, the resistance goes up. I've got the output from the photoresistors inputted to the clock pin on a 4027 dual JK flip flop. I've got J tied to 6V VSS, and K, Set, and Reset tied to ground. I can get one side of the JK working just fine. The problem is when I wire up the second side of the JK, I get nothing. The Q output stays low no matter what. When the beam of light is broken, nothing happens. Even when I try a second 4027, it won't work. I can only get one of my JK's to work correctly. No matter what I've tried, I can't get more than one sensor to work. I've got Vss and ground decouple using a 100 μF cap. My power supply is a BK precision regulated bench supply.
I've uploaded a circuit diagram. Any help with this would be much appreciated. Thank you.
Attachments
-
157.9 KB Views: 26