Wave Sound Generator
Restful electronics
It doesn’t take a lot of electronics to produce simulated wave sounds. A variety of circuits for this have been published in past issues of Elektor magazine. In light of recent growing interest in a design for a wave sound generator, we took a close look at the previous version (published in February 1996) and transformed it into an updated and very compact design.
Materials
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
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Component list
R1,R3,R4–R7,R9,R11,R13,R14,R18,R24 = 100kOhm (0805)
R2 = 33kOhm (0805)
R8 = 220kOhm (0805)
R10 = 470kOhm (0805)
R12 = 150kOhm (0805)
R15,R17 = 1MOhm (0805)
R16,R19,R21 = 1kOhm (0805)
R22,R23 = 47kOhm (0805)
P1 = 100kOhm trimpot (3306W)
P2 = 50kOhm trimpot (3306W)
Capacitors (SMD)
C1 = 100nF (0805)
C2,C3 = 100µF 16V (case-d)
C4 = 47µF 16V (case-d)
C5,C9 = 10µF 16V (case-b)
C6,C11 = 220µF 16V (case-e)
C7,C10 = 47nF (0805)
C8 = 220pF
Semiconductors (SMD)
D1 = BAT42W
T1,T2 = BC847
T4 = BCP53
T3 = BCP56
IC3 = LM2937IMP-12/NOPB
IC2 = TL084ACD
Miscellaneous
K1 = power adaptor socket (CUI PJ-007)
LS1 = miniature loudspeaker, e.g. Kingstate KDMG20008, Farnell # 1502730)
PCB # 100922-1
Assembled board # 100922-91
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