logic circuit

I would like to create an electronic circuit able to switch ON a relay (12V dc) when two contacts are open and switch it OFF only when both of them are closed. When this relay is switched on it starts heating of water in a buffer. And, of course, it stops heating when switches off… I mean, one...

Hi, I found below schematic in a theorie book. The given logic formula is: L=a . b . (b + c . d) (where b means b-not) I highly doubt that the logic formula and schematic correspond. Is the correct logic formula L=a . b . c . d for given schematic? Is L=a . b . (b + c . d) incorrect...

Hello everyone, I have a problem and I thought I should post it here because I can't quite get the hang of it. I was tasked to make a circuit that is made of only NOR-gates. Seemed simple at first but then the restrictions came in. The circuit needs to be made out of 4 NOR gates with 2 inputs...

How will the output of a combinational logic circuit change once the input is withdrawn? It will definitely change, how will it change?

Hello. This is JK flip-flop. I have to convert it into D flip-flop, that it does the same what JK does. Then I have to draw a logic circuit of D flip-flop. I don't know what to do, can you help me?