How To
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Double tone police/ambulance sound for kid bikes
Double-tone Police sound Single-tone old ambulance sound Circuit diagram: Parts: R1,R3___470K 1/4W Resistors R2______680K 1/4W Resistor R4_______82K 1/4W Resistor R5______330K 1/4W Resistor R6_______10K 1/4W Resistor R7_______33K 1/4W Resistor R8________3M3 1/4W...