Elektroničko zvonce (kanarinac)

Parts List:
R1 = 4K7 (yellow-violet-red)
R2 = 47K (yellow-violet-orange)

C1 = 100uF, 16V, electrolytic
C2 = 100uF, 16V, electrolytic
C3 = 0.01uF (10NF or 103)
C4 = 0.022uF (22NF or 223)

Q1 = 2N2222 (or BC109C, NTE123A, PN100, etc)
D1 = 1N4001 (optional. Used only for 6VAC)

S1 = Your existing doorbell button
T1 = 1000:8 audio transformer, CT (LT700)
LS1 = Loudspeaker, 8 ohm, 2 Watts

Izvor: tonys website