This is an alarm created from an Arduino using 3 LEDs, a Speaker, and a Ultra Sonic Sensor!

From 5-25cm everything goes off along with police siren sound

26-50cm one of the LEDs will flash and dull sound will play

51-200 one of the LEDs will flash and a very faint sound will play

Step 1: Add Speaker and +/- Wires

1. Add postive and negative jumper wire sGND(-) and 5V(+) from the Arduino to the bread board

2. Connect Speaker using the negative to negative, and positive to pin 4

Step 2: Add 3 LEDs to the Breadboard

`1.Connect 3 LEDs in a row on the breadboard for easy wiring

2. Connect the negative jumper wire to the breadboard then to the LED negative side (As shown)

3 Connect a 220 Ohm resister to the positive side of the LEDs

4.Connect a jumper wire from the resistor to the arduino usings pins 5,6,7

WARNING: MAKE SURE THE POSITIVE IS THE LONGER SIDE OF THE LED

1. Connect VCC to positive terminal breadboard

2. Connect GND to ground terminal on breadboard

3. Connect Echo to pin 9

4. Connect Trig to pin 8

That's it! Upload the code and you're secure!