www.logiccircuit.org

Thank you Eugene. Making that mistake was worth getting the link for that excellent web site.

Yes, step by step, learning and stumbling along the way.

I am receiving a complaint about oscillation when I power up a textbook example of a D Latch circuit.
Any suggestions?

John

Here is a circuit for your educational enjoyment. It is based on information that was found at http://library.thinkquest.org/25111/alu.shtml (with some reorganization).

The 1-bit ALU supports the following functions:

0: a AND b
1: a OR b
2: NOT b
3: a PLUS b

The test harness shows how each of ...

Woo Hoo! An inadvertent solder bridge!

Thanks Eugene! I'll post the correct circuit shortly.

One suggestion: How about making the color of wires different from the color of the components? It would make this type of error stand out and it would be easy to implement.

Thank you Eugene.

I have followed your directions so it looks like I am suffering from a misunderstanding that hopefully you can cure.

Thank you for your time.

Regards,
John

Eugene,

I am getting the following message when I power on my circuit.

LC Confusing Error Message.JPG

The named circuit runs fine in a standalone test so I suspect the problem is how I am using that circuit.

The identified circuit is the following:

component circuit.JPG

which is being ...

Attached is a CircuitProject file for a 4-Bit Shifter. The design is based on the circuit illustrated at http://library.thinkquest.org/25111/binmath.shtml.

Eugene,

You have done a wonderful job here. I find LogicCircuit to be an excellent tool for learning and experimenting. The ability to create logical ciruits and then drag and drop them into other circuits makes it so easy for a beginner like me to start with small understandable circuits and build ...