|Audio pickup from phone line
||Picks-up audio signal when near a phone that is in use.
|Caller ID and ring generator
||Uses AT90S1200 and generates FSK tones Bell 202 standard for communication and caller id.
|Cordless phone receiver v1
||Very good schematics for cordless telephone receiver 30-50 MHz.
|Cordless phone receiver v2
||Receiver for cordless telephones with a chip from a cordless phone.
|Phone call alert
||Alarm alert over PSTN phone line.
||Entire system for recording telephone conversations to .mp3, using USB audio pickup and a PC.
|Phoneline controller v1
||Control your appliances over PSTN phone line.
|Smart telephone light
||Turns on lights when phone rings and if in dark.
|Telephone line recorder v1
||A device that turns-on voice recorder automatically and taps to the phone line.