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Telephone - all subcategories

The Link Telephone Intercom – Every Home Should Have One!

author: Austin Hellier, Wollongong City, Australia © 1997-2003
visits: 10496

Cellular Phone calling Detector

author: RED Free Circuit Designs
visits: 8626

FM Telephone Bug

Small telephone bug. Listen telephone line on your FM receiver. It is self powered. Small part count.

author:
visits: 3601

8 Line Intercommunication using 89c51

author: Ashad mustufa
visits: 2026

Phone "Hold" With Music

author:
visits: 1911

Telephone line monitor

author:
visits: 1848

The Link 4+0 – Internal Intercom

author: Austin Hellier, Wollongong City, Australia © 1997-2003 (26 Nov 2003)
visits: 1786

Telephone amplifier

author:
visits: 1758

Soft Musical Telephone Ringer

author:
visits: 1747

Telephone line monitor

author: smartkit
visits: 1731