20Ultrasonic Soaker
In this project we’ll use an ultrasonic sensor to trigger a toy water pistol. You could set this up to soak unsuspecting victims when they venture into forbidden territory!
PARTS REQUIRED
Arduino board
Breadboard
Jumper wires
HC-SR04 ultrasonic sensor
WLtoys V959-18 Water Jet Pistol
LIBRARY REQUIRED
NewPing
HOW IT WORKS
For our soaker, we’ll use the WLtoys V959-18 Water Jet Pistol (Figure 20-1) attachment for RC helicopters, which is inexpensive and widely available online. The pistol has a small reservoir to hold water and ...
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