74HC393 Dual Binary Counter Clock Divider

Slice a single 555 clock into eight progressively slower frequencies using a dual 4-bit binary counter — the cleanest way to see how a counter chain divides a base frequency by powers of two.

Difficulty: Breadboard. Estimated build time: about 35 minutes. Estimated parts cost: about US$3.60. 8-part bill of materials with live supplier pricing. A clock-divider chain that takes one input frequency and produces eight outputs at /2, /4, /8, /16, /32, /64, /128, /256 of the original.