Realistic Police Siren Kit by Ramsey Electronics
View 3 Pages working of electronic police siren by Ramsey Electronics
[Page 4] - power transistor. The metal back-side of Q1 must face as shown or your siren ... power transistor. The metal back-side of Q1 must face as shown or your siren ... [Page 5] - 'll hear the characteristic upward wail of the police siren. TESTING THE SM3 For ... 'll hear the characteristic upward wail of the police siren ... |