cu_fisier

website/versioned_docs/version-acs_cc/project/2026/roberto.lotan/index.md

@@ -0,0 +1,87 @@
+# Shot Maker
+A smart system that automatically prepares drink shots based on user selection.
+
+:::info
+
+**Author**: Lotan Roberto-Gabriel  \
+
+**GitHub Project Link**: https://github.com/UPB-PMRust-Students/acs-project-2026-Adamura1
+
+:::
+
+## Description
+
+Shot Maker is an automated system that prepares drink shots based on user input. The user selects a drink type from a display interface. Based on this selection, the system calculates the required quantity for each ingredient.
+
+Liquids are dispensed into a glass using pumps or valves. A weight sensor continuously measures the amount poured, and the system stops dispensing when the target weight is reached. For multi-ingredient drinks, each component is added proportionally.
+
+## Motivation
+
+The project aims to automate drink preparation while ensuring precision and repeatability. It explores embedded control systems applied to real-world tasks.
+
+## Architecture
+
+- **Input Layer**: touchscreen interface for selecting drink type  
+- **Processing Layer**: computes target weight and ingredient ratios  
+- **Actuation Layer**: controls pumps or valves  
+- **Measurement Layer**: load cell monitors real-time weight  
+- **Output Layer**: final drink in the glass  
+
+### Flow Summary:
+- User selects drink  
+- System computes ingredient weights  
+- Pumps dispense liquids  
+- Load cell measures continuously  
+- System stops at target weight  
+
+## Log
+
+### Week 20-26 Apr
+- Defined functionality  
+- Identified main components  
+
+### Week 27-3 Apr
+- Wired the STM32 Nucleo board
+- Flashed the first Rust firmware via probe-rs
+
+### Week 4-10 Apr
+- Implemented HX711 driver and pump PWM
+- Calibrated tare and pouring tolerance
+
+## Hardware
+
+- STM32 Nucleo-U545RE-Q microcontroller
+- SSD1306 OLED 128x64 (I2C)
+- Load cell 1 kg + HX711 amplifier
+- 3x 12V peristaltic pumps
+- 3x N-channel logic-level MOSFETs + 1N4007 flyback diodes
+- 2x momentary push buttons
+- 12V / 5A power supply for the pumps
+- 5V step-down regulator for logic
+
+### Schematics
+![Schematic](schematic.svg)
+### Photos
+
+### Bill of Materials
+
+| Device | Usage | Price |
+|--------|-------|-------|
+| STM32 NUCLEO-U545RE-Q | Microcontroller (main control unit) | ~120 RON |
+| HX711 Load Cell Amplifier | Converts load cell signal to digital | ~10 RON |
+| Load Cell 1kg | Measures weight of the liquid | ~35 RON |
+| Peristaltic Pump 12V x3 | Dispenses liquids | ~50 RON x 3 |
+| MOSFET IRLZ44N x3 | Controls pumps from microcontroller | ~5 RON x 3 |
+| SSD1306 OLED 128x64 (I2C) | User interface display | ~25 RON |
+| Power Supply 12V 5A | Powers pumps | ~50 RON |
+| Breadboard | Prototyping | ~15 RON |
+| Jumper Wires | Connections | ~10 RON |
+| Silicone Tubing | Liquid transport | ~15 RON |
+
+TOTAL: ~450 RON
+
+## Links
+
+* [About Rust](https://docs.rust-embedded.org/book/)
+* [Youtube](https://youtu.be/Z7GkGeZrb2Y)
+* [Youtube2](https://youtu.be/2DopvpNF7J4)