Time-It Compact

Overview

Engineered and assembled a fully synchronous, high-precision digital stopwatch using discrete TTL/CMOS logic ICs on physical breadboards, operating entirely on hardware gate logic without any microcontroller software code.

Key Features

• ◆4 units of 74HC160 decade counters and 74HC4511 BCD-to-7-segment decoders driving synchronous MM:SS timing array
• ◆Hardware lap capture using 74HC157 multiplexers and 74HC175 registers, locking display while background counters run
• ◆Start/stop state machine with 74HC76 JK flip-flops preventing push-button contact bounce from disrupting timing
• ◆Comprehensive logic trees with 74HC08 (AND), 74HC04 (NOT), and 74HC02 (NOR) for reset, timing gate, and mode control
• ◆Clock distribution network calibrated with oscilloscope for 1 Hz oscillator precision

Skills

Gallery

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