Device for light signalization ringing the telephone
The quality device for the turning on bulbs (light) at ringing telephone. Firstly made complex works already more than 7 year without failure. Must take into consideration that during every stroke of lightning around arrives to high-voltage discharges who badly isolated appliance would destroy.
For the trigger transformer has been used core Siemens ETD29 / N67 with distance between coils from 10mm.
Price: the 300 HRK without box (40 euro)