Case study / 2026
ESP32-S3 Smart GST Calculator
Battery-operated smart GST calculator hardware for merchants, built around ESP32-S3, a four-inch display, a 35-key matrix keypad, local storage and wireless thermal-printer connectivity.
Engineering contribution
Role & scope
- Role
- Embedded Hardware & PCB Design Engineer
- Year
- 2026
System architecture, schematic capture, PCB design and production-file handoff for a battery-operated product.
Technical highlights
- ESP32-S3 with Wi-Fi connectivity
- 35-key matrix and 4-inch TFT interface
- USB-C charging and efficient 3.3 V rail
- Manufacturing-ready BOM and assembly data
Tools & skills
Altium DesignerESP32-S3USB-CSPIWi-FiBattery systemsInterface designDense placementDFM
Scope in context
Engineering concepts.
These visuals explain the project’s hardware scope. They are concept presentations, not photographs of fabricated client hardware.
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