V2 – 74LS192 Cruise System
Uses a 74LS192 up/down counter approach with display driver, comparator, green/yellow range logic, and flashing red warning.
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Circuit Explanation
The 74LS192 up/down counter allows speed to be both increased and decreased. A display driver decodes the count to a 7-segment display, while the 74LS85 comparator generates the cruise warning. Dedicated range logic drives the green LED for speeds 0–5 and the yellow LED for speeds 6–9, with the NE555 flashing the red LED at the set speed.
Components Used
Schematic Preview
Proteus Project Files
V2 74LS192 Cruise System Proteus Project
V2/cruise.pdsprj
Proteus simulation
cruise.pdsprj
Proteus 8 Professional simulation project for V2 - 74LS192 Cruise System.
Open using Proteus 8 Professional.
Circuit Schematic PDF
V2 74LS192 Cruise System Circuit Schematic
V2/cruise.PDF
Circuit schematic
cruise.PDF
Exported circuit schematic PDF for V2 - 74LS192 Cruise System.
Truth Tables
V2 74LS192 Cruise System Truth Tables
V2/cruise_74ls192_truth_tables_updated.pdf
Truth table
cruise_74ls192_truth_tables_updated.pdf
Truth-table PDF documenting the logic used in V2 - 74LS192 Cruise System.
V2 74LS192 Cruise System Truth Tables
V2/cruise_truth_tables.pdf
Truth table
cruise_truth_tables.pdf
Truth-table PDF documenting the logic used in V2 - 74LS192 Cruise System.
Word Report
V2 74LS192 Cruise System Word Report
V2/project_v02_ga1_report.docx
Word report
project_v02_ga1_report.docx
Editable Word report for V2 - 74LS192 Cruise System.
PDF Report
V2 74LS192 Cruise System PDF Report
V2/project_v02_ga1_report.pdf
PDF report
project_v02_ga1_report.pdf
PDF report for V2 - 74LS192 Cruise System.
Limitations & special logic notes
Carry/borrow chaining between counter stages and out-of-range states still need additional correction logic, which is refined in V5.