| Alarm with 4 sensors |
Very simple alarm with NE556 and 4 sensors. |
| Alarm with PIC microcontroller |
Some simple PIC based alarm. |
| GSM SMS alarm |
GSM SMS alarm - module with 5 inputs/sensors. |
| GSM call alarm |
GSM call alarm - module with 1 sensor. |
| SMS alarm - by Pance |
SMS Alarm witn GSM phone Ericsson T10. |
| Small electronic siren v2 |
Small electronic siren with NE562. |
| Tiny GSM alarm system |
GSM based Call and SMS alarm system that can operate standalone or as a GSM alerter module to existing alarm system. |
| 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. |
| Two tone siren v1 |
Two tone siren using two NE555 ICs. |
| Two tone siren v2 |
Two-tone siren with CMOS IC 40106. |
| Two tone siren v3 |
Two tone siren using two NE555 timer ICs. |
| Wireless car alarm |
A very simple wireless car alarm device. |
