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+# 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)
diff --git a/website/versioned_docs/version-acs_cc/project/2026/roberto.lotan/schematic.svg b/website/versioned_docs/version-acs_cc/project/2026/roberto.lotan/schematic.svg
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+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 900 560" font-family="Helvetica, Arial, sans-serif" font-size="13">
+  <defs>
+    <marker id="arr" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse">
+      <path d="M0,0 L10,5 L0,10 z" fill="#333"/>
+    </marker>
+    <style>
+      .mcu { fill: #e3f2fd; stroke: #1565c0; stroke-width: 2; }
+      .pump { fill: #fff3e0; stroke: #e65100; stroke-width: 1.5; }
+      .sense { fill: #e8f5e9; stroke: #2e7d32; stroke-width: 1.5; }
+      .ui { fill: #f3e5f5; stroke: #6a1b9a; stroke-width: 1.5; }
+      .pwr { fill: #ffebee; stroke: #b71c1c; stroke-width: 1.5; }
+      .title { font-size: 18px; font-weight: bold; fill: #111; }
+      .label { font-size: 14px; fill: #111; font-weight: bold; }
+      .sub { font-size: 11px; fill: #555; }
+      .wire { stroke: #333; stroke-width: 1.4; fill: none; }
+      .pwr-wire { stroke: #c62828; stroke-width: 1.8; fill: none; }
+    </style>
+  </defs>
+
+  <text x="450" y="30" text-anchor="middle" class="title">Shot Maker</text>
+
+  <!-- MCU -->
+  <rect class="mcu" x="350" y="220" width="200" height="100" rx="8"/>
+  <text x="450" y="260" text-anchor="middle" class="label">STM32 Nucleo</text>
+  <text x="450" y="280" text-anchor="middle" class="sub">U545RE-Q</text>
+
+  <!-- OLED -->
+  <rect class="ui" x="70" y="90" width="180" height="70" rx="6"/>
+  <text x="160" y="130" text-anchor="middle" class="label">OLED 128×64</text>
+
+  <!-- Buttons -->
+  <rect class="ui" x="70" y="200" width="180" height="70" rx="6"/>
+  <text x="160" y="240" text-anchor="middle" class="label">2× Buttons</text>
+
+  <!-- Load cell + HX711 -->
+  <rect class="sense" x="70" y="310" width="180" height="80" rx="6"/>
+  <text x="160" y="345" text-anchor="middle" class="label">Load Cell</text>
+  <text x="160" y="362" text-anchor="middle" class="sub">+ HX711</text>
+
+  <!-- Pump 1 -->
+  <rect class="pump" x="650" y="90" width="180" height="70" rx="6"/>
+  <text x="740" y="125" text-anchor="middle" class="label">Pump 1</text>
+  <text x="740" y="142" text-anchor="middle" class="sub">MOSFET + PWM</text>
+
+  <!-- Pump 2 -->
+  <rect class="pump" x="650" y="200" width="180" height="70" rx="6"/>
+  <text x="740" y="235" text-anchor="middle" class="label">Pump 2</text>
+  <text x="740" y="252" text-anchor="middle" class="sub">MOSFET + PWM</text>
+
+  <!-- Pump 3 -->
+  <rect class="pump" x="650" y="310" width="180" height="70" rx="6"/>
+  <text x="740" y="345" text-anchor="middle" class="label">Pump 3</text>
+  <text x="740" y="362" text-anchor="middle" class="sub">MOSFET + PWM</text>
+
+  <!-- Power -->
+  <rect class="pwr" x="350" y="420" width="200" height="60" rx="8"/>
+  <text x="450" y="455" text-anchor="middle" class="label">Power 12V / 5V</text>
+
+  <!-- Glass / output -->
+  <rect class="sense" x="70" y="420" width="180" height="60" rx="6"/>
+  <text x="160" y="455" text-anchor="middle" class="label">Glass on Scale</text>
+
+  <!-- Wires MCU left -->
+  <path class="wire" d="M350,250 L300,250 L300,125 L250,125" marker-end="url(#arr)"/>
+  <text x="285" y="145" class="sub">I2C</text>
+  <path class="wire" d="M350,270 L300,270 L300,235 L250,235" marker-end="url(#arr)"/>
+  <text x="285" y="225" class="sub">GPIO</text>
+  <path class="wire" d="M350,290 L300,290 L300,350 L250,350" marker-end="url(#arr)"/>
+  <text x="285" y="340" class="sub">DT/SCK</text>
+
+  <!-- Wires MCU right -->
+  <path class="wire" d="M550,250 L600,250 L600,125 L650,125" marker-end="url(#arr)"/>
+  <text x="605" y="145" class="sub">PWM</text>
+  <path class="wire" d="M550,270 L600,270 L600,235 L650,235" marker-end="url(#arr)"/>
+  <text x="605" y="225" class="sub">PWM</text>
+  <path class="wire" d="M550,290 L600,290 L600,345 L650,345" marker-end="url(#arr)"/>
+  <text x="605" y="340" class="sub">PWM</text>
+
+  <!-- Power lines -->
+  <path class="pwr-wire" d="M550,450 L860,450 L860,345 L830,345"/>
+  <path class="pwr-wire" d="M860,345 L860,235 L830,235"/>
+  <path class="pwr-wire" d="M860,235 L860,125 L830,125"/>
+  <text x="780" y="445" class="sub" fill="#c62828">+12V</text>
+
+  <path class="pwr-wire" d="M350,450 L40,450 L40,350 L70,350"/>
+  <path class="pwr-wire" d="M40,350 L40,235 L70,235"/>
+  <path class="pwr-wire" d="M40,235 L40,125 L70,125"/>
+  <text x="50" y="445" class="sub" fill="#c62828">+5V</text>
+
+  <!-- Pump output to glass -->
+  <path class="wire" d="M650,160 L580,160 L580,445 L250,445" stroke="#1976d2" stroke-width="1.6" marker-end="url(#arr)"/>
+  <path class="wire" d="M650,270 L575,270 L575,448 L250,448" stroke="#1976d2" stroke-width="1.6"/>
+  <path class="wire" d="M650,380 L570,380 L570,451 L250,451" stroke="#1976d2" stroke-width="1.6"/>
+  <text x="555" y="470" class="sub" fill="#1976d2">tubing</text>
+
+  <!-- Legend -->
+  <g transform="translate(40, 525)">
+    <rect class="mcu" x="0" y="-10" width="14" height="14"/>
+    <text x="20" y="2" class="sub">MCU</text>
+    <rect class="ui" x="70" y="-10" width="14" height="14"/>
+    <text x="90" y="2" class="sub">UI</text>
+    <rect class="sense" x="130" y="-10" width="14" height="14"/>
+    <text x="150" y="2" class="sub">Sensing</text>
+    <rect class="pump" x="220" y="-10" width="14" height="14"/>
+    <text x="240" y="2" class="sub">Pumps</text>
+    <rect class="pwr" x="300" y="-10" width="14" height="14"/>
+    <text x="320" y="2" class="sub">Power</text>
+  </g>
+</svg>