Instructions

ManualsBrandsWhadda ManualsEducation & Development Kitstelephone ring detector with relay output

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Construction

IC1 : 4N27

15. IC, watch the position of

the notch!

SK2 : 12VDC

10. DC-jack

-

SK...

+

SW

LD1 : 5mm (super red)

11. LED. Watch the polarity!

SK1 : 4p (type RJ11)

12. Modular Jack

C1 : 1µF / 275VAC

13. Capacitor

RY1 : VR15M121C

14. Relay

RY ...