| Alarm with 4 sensors |
Very simple alarm with NE556 and 4 sensors. |
| Automatic coming/leaving home light |
Overkilled automatic hallway light - functional device built mostly for fun. |
| Color sensor |
Detects 8 different collors. |
| Double sensor |
Senzor activated by light and vibrations. |
| EF sensor |
Nice detector of presence and movement. |
| Fire sensor |
Sensor that detects fire, hopefully not too late. |
| Knock-knock alarm |
Alarm, more of a sensor, that activates on door knocking sound. |
| Light activated alarm |
Turns alarm (buzzer) ON, when light hits the sensor. |
| Light sensor |
Another light sensor that uses NE555. |
| PIR sensor |
PYR, motion sensor activated by body head. |
| Touch activated alarm v1 |
Activates alarm (buzzer) when someone comes close to the device. |
| Touch activated alarm v2 |
Activates alarm when someone comes close to the device. |
| Touch activated alarm v3 |
Activates an alarm by touch of a hand. |
| Ultrasonic sensor v1 |
Ultrasonic (piezzo) sensor/detector with NE555 and MAX406. |
| Ultrasonic sensor v2 |
Detects motion based on ultrasonic sound. |
| Ultrasonic sensor v3 |
Detects motion with ultrasound. |
| Wind sensor |
Can be used for high-security alarms as a motion sensor. |
