Simulator
Arduino & AVR (8-Bit)
Arduino Uno
Arduino Mega
Arduino Nano
ATtiny85 (DIP-8)
ARM & RISC-V (32-Bit)
Raspberry Pi Pico
Raspberry Pi Pico W
ESP32-C3 DevKit
Projects
Top Categories
Arduino Uno
ESP32-C3
Raspberry Pi Pico
Arduino Mega
Arduino Nano
ATtiny85
Starter Projects
View All →
Build a 7-Segment Countdown with Arduino
Turn Movement into an Alarm with Arduino
Build a Mini Stopwatch Using Arduino
Display Heartbeat BPM on an Arduino LCD
Design a Color Weather Dashboard with Arduino
Build a Servo Door Lock with Arduino
Components
Sensors
DHT22
Ultrasonic
PIR Motion
Displays
LCD 1602
OLED SSD1306
7-Segment
Actuators
Servo Motor
Buzzer
LED Ring
Inputs & Controls
Pushbutton
Potentiometer
Membrane Keypad
See all components
Workspace
AI Assistant
Log In
Register
Projects
Categories
Safety
1 Projects
Safety Projects
Explore beginner-friendly projects using Safety. Run them in the simulator, tweak the code, and learn step by step.
All Categories
I
IoTSim Editor
Sep 22, 2026
Send an SOS Signal with an ATtiny85 and a Buzzer
Press a button and watch a red LED flash while a buzzer beeps out the international SOS signal — three short, three long, three short. This project teaches you how to control timing precisely with a tiny 8-pin microcontroller.
ATtiny85
Audio
+3
