Single Bit ALU

188

01:48:34

Supports logical AND, logical OR, addition, subtraction, greater than, less than, and equal to. From the top left to bottom left, you have input A, B, and Carry. Below this is the B inverter. All of these are switched off by default. Manual switches are used to change mode. The first switch at middle top switches between logical AND and logical OR. The switch after this switches between the logical operators and addition/substraction. By default, addition is used. Switch on the B inverter and the Carry bit for substraction. At the top right is the comparator. The first switch coming off of this switches greater than and less than. The switch after this switches between greater/less than and equal to. The final switch switches between logical operators/adder and the comparator. Green is the result output bit and purple is the carry output bit.

published 11 years ago

Sine_eyed

11 years ago

It's a Swiss army circuit! An all-inclusive cruise to the bahamalogics lol. Ok I'll be serious now- looks like you put some time into this to get it the way you wanted. It's nice- good job keep it up! Now, where's those damn tweezers again?...

Antonius

11 years ago

Thanks man! I had intended for it to be a 4-bit ALU with voltage controlled switching for mode selection, but there wasn't enough room. The 4-bit version would include multiplication and division (done by bit shifting). You can easily expand on this 1-bit module by connecting them together though.

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