/Schematics/Telephone circuits

Title Short description Rate Download
Telephone exchange with 2 numbers Small telephone exchange with 2 numbers. 2.87 3,894
Telephone line recorder v1 A device that turns-on voice recorder automatically and taps to the phone line. 2.86 3,322
Telephone metering signal counter Counts 16kHz signals on phone line. 2.87 2,940
Audio pickup from phone line Picks-up audio signal when near a phone that is in use. 2.83 2,752
Telephone line recorder v2 A device that turns-on voice recorder automatically and taps to the phone line. 2.85 2,348
Caller ID with 7-seg display DTMF Caller ID, not FSK but DTMF. 2.91 2,346
Nice telephone ring melody Nice telephone ring melody device. 2.82 2,184
Smart telephone light Turns on lights when phone rings and if in dark. 2.88 2,126
Caller ID and ring generator Uses AT90S1200 and generates FSK tones Bell 202 standard for communication and caller id. 2.80 2,101
Telephone line recorder v4 A device that turns-on voice recorder automatically and taps to the phone line. 2.89 1,880
Telephone ring counter Telephone ring counter device. 2.82 1,788
Half-a-phone A phone that can only accept calls. 2.89 1,737
Telephone answering machine Telephone answering machine. 2.94 1,727
UPS for cordless phones Backup power supply for cordless phones base station. 2.87 1,686
Telephone line recorder v3 A device that turns on voice recorder automatically and records phone conversation. 2.87 1,637

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