Intercoms
| Circuit / Schematic diagram of | Description |
|
|
8 Line intercom using ATMEL AT89c51 microcontroller |
| Full-duplex Intercom | Two intercom system without an operator |
| Door Phone Intercom | |
| Head set Intercom | |
| High Quality Intercom | |
| Intercom | Link includes schematic only |
| Telephone based Intercom-1 | Simple circuit which converts your old phone to intercom system |
| Telephone based Intercom-2 | |
| InterCommunication | |
| Transistorized Intercom | Transistor based and 3-stage resistor-capacitor coupled amplifier |