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4-bit TTL ALU

A project log for One Transistor FlipFlop

Flip-Flop design with just one transistor. Nice for transistor-CPU's ! The principle can also be used for vacuum tube flipflops.

roelhroelh 08/15/2018 at 20:460 Comments

If you are interested in flipflops, building CPU's might also be of interest to you.... I started a new project, a 4 bit TTL ALU with only 7 TTL IC's.  It fits on a 1 x 1 inch PCB.....

And the next project is a TTL CPU on one square inch !

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