ALL >> Writing >> View Article
Ne556 Police Siren Sound Generator Circuit

This is an extremely simple circuit that can produce a siren sound similar to that of an American police car. The alarm lights will flash simultaneously when the alarm sounds. This circuit can provide a load greater than 1A, can drive several lights or high-power loudspeakers, this circuit will produce considerable sound and light.
This circuit consists of two astable multivibrators. NE556 is used here instead of the commonly used 555. You can also use two separate 555s, if you think this is more suitable for you. Both timer chips are set up as non-steady-state multi-resonant circuits.
First, the timer chip (as shown in the figure below) generates a 2Hz square wave signal at pin 9 by setting the parameter values of R1, R2 and C2, and controls the on and off of the power transistor T1 to control the on and off of the warning light La1. Secondly, the timer chip (as shown in Figure 1) sets the values of R4, R5 and C4, and generates a square wave at pin 5 to drive the loudspeaker LS1. The switching voltage generated by the first timer pin 9 periodically charges and discharges the electrolytic capacitor ...
... C3 through R3, and C3 is connected to the second timer control input pin 3 to make it work on the VCO (voltage controlled oscillator). The result is a periodic square wave that causes the loudspeaker to rise and fall, producing a realistic police siren sound, as you often hear in movies.
More information:
https://www.utmel.com/components/ne556-dual-timer-ic-circuit-pinout-and-datasheet?id=156
Add Comment
Writing Articles
1. Home Office Design Ideas For Maximum ProductivityAuthor: Living Edge Architects and Designers
2. Designing For Seniors: The Future Of Age-friendly Homes
Author: Living Edge Architects and Designers
3. Airi Lab | Ai Design Tools Built By Architects, For Architects
Author: Airilab
4. Unlock Explosive Growth With A Chicago Local Seo Company
Author: benne
5. Xưởng Cuốn ống Inox Báo Giá Tốt Nhất
Author: giacongthanhphat
6. Best Finance Career With Corporate Finance Assignment Help
Author: thomas lucas best article write
7. Cắt Laser Chính Xác đến Mức Nào
Author: giacongthanhphat
8. Designing For Wellness: Light, Air, And Flow
Author: Living Edge Architects and Designers
9. Small Space, Big Impact: Interior Design Tips For Compact Homes
Author: Living Edge Architects and Designers
10. Why Some Homes Feel Cozy While Others Don’t – The Architecture Behind It
Author: Living Edge Architects and Designers
11. The Psychology Of Space: How Architecture Impacts Mental Health
Author: Living Edge Architects and Designers
12. Revitalize Your Career: The Power Of An Old Cv Modification Service
Author: CV Mantra
13. Mastering Business Knowledge: The Key To Entrepreneurial Success
Author: Sameer Shah
14. How Chinese Translation Takes Care Of Different Accents, Dialects, And Speech Patterns?
Author: janylin
15. The Hidden Hunger Of Refugees Along The Thailand–myanmar Border
Author: Avoda Foundation