Arduino Timer Embedded Systems Project

An Arduino timer with a buzzer alarm, control buttons, an analog thermometer and LCD/7Seg Displays

There are a few discrepancies between the schematics and the actual design as not everything was available in TinkerCad. An Arduino Uno is used instead of the Arduino Mega 2560 that is needed, the 4 digit 7-segment display is replaced by 4 single digit 7-segment displays and also the thermistor is replaced by a TMP sensor

Information

Looks like a bomb innit

Features a start/stop button, buttons to add or remove time, indicator LEDs and most importantly an analog thermometer so you can tell just when the bomb has gone off

List of Materials (BOM)

• [1x] Arduino (Arduino Mega 2560 is preferrable however an Uno works in a pinch)
• [1x] Breadboard
• [1x] Piezo Buzzer
• [3x] Pushbutton
• [1x] 100 Ω Resistor
• [3x] 220 Ω Resistor
• [1X] 1 kΩ Resistor
• [3X] 10 kΩ Resistor
• [8X] 330 Ω Resistor
• [1x] 4 Digit 7-Segment Display
• [2x] Red LED
• [1x] Green LED
• [1x] MCP23008-based, 32 LCD 16 x 2 (I2C)
• [1x] Thermistor (10k)

Approximate Unit Price (2023, aliexpress) = 7,2€