This project is a 3 tone siren based on UM3561 IC.
3 Tone Siren project produces Gun Sound, Police
Siren and Ambulance Siren effects from a speaker.
This project is built around UM3561
IC driving an LM386 audio amplifier
to give that extra punch.
Supply input 6 VDC @ 200 mA
Output : Speaker, 8
Ω / 0.5 W
Two slide switches select and play
On/Off Side switch for supply
Terminal pins for supply input and speaker
Power-On LED indicator
holes of 3.2 mm each
PCB dimensions 42 mm x 64
PCB bottom layer