<p>➀ This article introduces a DIY project for building a two-digit counter using a 7-segment display and a 555 timer.</p><p>➁ The counter increments from 00 to 99 with each clock pulse and resets after reaching 99, featuring separate control for units and tens digits.</p><p>➂ The project explains the circuit design and working principle, involving components like LM555 timer, CD4033 decade counters, and 7-segment displays.</p>