One of the more famous of these devices is the 74181, a cascadable 4-bit arithmetic logic unit, or ALU. An ALU is the heart of a microprocessor, performing its operations. The 74181 appeared in ...

The majority of embedded CPUs are limited to operations on 32- and 64-bit ... Public key cryptography requires complex mathematical operations on very large numbers (from 160 to 4096 bits, or more).

This 2-bit adder was a lot of work to build. It uses a total of thirty-six 555 timers and it does have the option of adding or subtracting numbers. It’s a rather unorthodox use of the part ...