Session 2 of 4
Motion, Sound & Alarms
Spin a fan, make noise, and build two security alarms.
0 of 4 finished
- 1
Spin a fan
Drive a real motor with the L293D chip and battery power.
Challenge⏱ about 40 min
- 2
Make some noise
Beep with the active buzzer, then play a siren and a tune with the passive one.
Easy⏱ about 25 min
- 3
Motion-sensor security alarm
Nobody gets near your desk without the alarm going off.
Challenge⏱ about 40 min
- 4
Light-sensor security alarm
A shadow alarm: cover the sensor and it screams.
Medium⏱ about 35 min
