R1,R4 = 6K8 C1,C4 = 100uF,16V electrolytic
R2,R9 = 10K C2,C3 = 0.05uF, ceramic
R3 = 2K2
R5,R7 = 1K B1 = 9V Alkaline Battery
R6 = 100 ohm SPKR1 = Loudspeaker, 8 ohm
R8 = 22K S1 = SPST switch
Q1,Q3,Q4,Q5 = 2N3904
Q2 = 2N3906
A complete KIT plus Printed Circuit Board will be available soon.
Note that the printed circuit board is only available with the kit.
Exchange R8 for a higher pitch. Experiment with R8, C1, or combination thereoff.
This article is © EKI (Electronics Kits International, Inc. (no longer in business))
Destroyer Whooper using transistors
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Copyright © Tony van Roon