Become a Member
Article

US-Style Siren: An Elektor Classic!

US-Style Siren: An Elektor Classic!
US-Style Siren: An Elektor Classic!
Many projects that flash, beep, move or do weird things have become Elektor classics and were published mainly in the Summer Circuits editions of the past. The recipe: inexpensive parts from the “old skool” bin and an immediate appeal to beginners (and — no offense — non-technical audiences). Here’s one: a siren-sound generator whose schematic is on a PCB crafted to ornament your desk.
Download article
 

Materials

Build This Project

Bring this design to life with the Elektor PCB Service, powered by Eurocircuits. Upload the project files and order professionally manufactured PCBs or assembled boards through a proven European production platform.

Supporting KiCad, Eagle, Gerber, and ODB++ formats, the service is suitable for everything from prototypes and validation builds to series production and volume manufacturing.

Made in Europe. Fast. Reliable. Professional.

Fabricate This PCB

Bill of Materials

Component List

[Illustration 220235-003-94]

[Illustration 220235-004-94]

Resistors (5%, 0.25 W)

R1,R9 = 2.2 kΩ
R2 = 470 Ω
R3 = 47 kΩ
R4,R8 = 22 kΩ
R5,R6,R7 = 18 kΩ
R10 = 3.3 kΩ
R11 = 1 kΩ

Capacitors

C1 = 100 µF, 16V
C2 = 2.2 µF, 16V
C3 = 10 µF, 16V
C4 = 47 µF, 16V
C5 = 22 nF, 5 mm pitch
C6 = 33 nF, 5 mm pitch
C7 = 470 µF, 16V

Semiconductors

T1,T2,T3,T4 = BC547
T5 = BC327

Miscellaneous

BAT1 = 2032 coin cell holder (Keystone 3003)
LS1 = speaker 8 Ω, 200 mW (Kingstate KSSG1708)
S1 = SP3T slide switch (C&K OS103011MA7QP1)
S2 = tactile switch, 6 mm pitch

 

Discussion (0 comments)

Embed Code