CD4060 14-Stage Counter Slow Blinker

Blink an LED once every two seconds, every two minutes, or every two hours — without an MCU. The CD4060 builds its own oscillator and counts to 16384.

Difficulty: Breadboard. Estimated build time: about 25 minutes. Estimated parts cost: about US$2.20. 9-part bill of materials with live supplier pricing. A pure logic blinker that can pulse an LED at intervals from a fraction of a second up to many minutes, without a microcontroller and without a 555 + counter chain.