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Telephone related - list of circuit diagrams

page: 1
Phone line indicator circuit diagram
Circuit that allows you to monitor your telephone line

visits: 4394
Telephone line monitor circuit diagram
Useful circuit if you feel that somebody is tampering with your telephone line

visits: 2063
Telephone amplifier circuit diagram
This amplifier will provide fairly good volume for the telephone conversation to be properly heard in a living room

visits: 2020
Phone Hold With Music circuit diagram
This circuit will allow you to place a phone call on hold and if you wish to have them listen to music while they are on hold

visits: 1925
Soft Musical Telephone Ringer circuit diagram
The circuit converts the loud sounding bell into a soft and pleasing musical tone

visits: 1786
page: 1