123ArticleOnline Logo
Welcome to 123ArticleOnline.com!
ALL >> Writing >> View Article

Ne556 Police Siren Sound Generator Circuit

Profile Picture
By Author: Jennie
Total Articles: 1
Comment this article
Facebook ShareTwitter ShareGoogle+ ShareTwitter Share

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

Total Views: 291Word Count: 246See All articles From Author

Add Comment

Writing Articles

1. Unlock Explosive Growth With A Chicago Local Seo Company
Author: benne

2. Xưởng Cuốn ống Inox Báo Giá Tốt Nhất
Author: giacongthanhphat

3. Best Finance Career With Corporate Finance Assignment Help
Author: thomas lucas best article write

4. Cắt Laser Chính Xác đến Mức Nào
Author: giacongthanhphat

5. Designing For Wellness: Light, Air, And Flow
Author: Living Edge Architects and Designers

6. Small Space, Big Impact: Interior Design Tips For Compact Homes
Author: Living Edge Architects and Designers

7. Why Some Homes Feel Cozy While Others Don’t – The Architecture Behind It
Author: Living Edge Architects and Designers

8. The Psychology Of Space: How Architecture Impacts Mental Health
Author: Living Edge Architects and Designers

9. Revitalize Your Career: The Power Of An Old Cv Modification Service
Author: CV Mantra

10. Mastering Business Knowledge: The Key To Entrepreneurial Success
Author: Sameer Shah

11. How Chinese Translation Takes Care Of Different Accents, Dialects, And Speech Patterns?
Author: janylin

12. The Hidden Hunger Of Refugees Along The Thailand–myanmar Border
Author: Avoda Foundation

13. Warehouse Storage Services: The Backbone Of Efficient Supply Chain Management
Author: kabir kumar

14. Write For Us Job And Business – Become A Contributor At Jobify
Author: Abhishek

15. How Ai Writing Is Making Homework Easier For Everyone
Author: Jeffery Harper

Login To Account
Login Email:
Password:
Forgot Password?
New User?
Sign Up Newsletter
Email Address: