The presented circuit activates a relay when a telephone call occurs. The relay can be used to activate a higher power lamp or even a remote cicada. The circuit uses a 48 V relay.
Telephone Call Sign (CB16888E)
- Details
- Written by: Newton C. Braga
The presented circuit activates a relay when a telephone call occurs. The relay can be used to activate a higher power lamp or even a remote cicada. The circuit uses a 48 V relay.
