Dual Tone Train Horn Circuit

jacky February 22, 2011 3 Comments


A dual tone train horn simulator circuit can be made using two NE 555 timers connected in cascade.Here instead of using two NE 555 timers a single NE 556 timer is used which is a nothing but two 555’s in one package and each timers work independently.Switch S1 can be used to start the horn.The circuit is simple and low cost but works greatly.

Circuit Diagram & Parts List.

Dual Tone Circuit

Train Sound Circuit Diagram


  • Use a 9V DC power supply or battery for this circuit.
  • Assemble the circuit on a good quality PCB or common board.Constructing a bread board prototype is recommended.

We have more Tone Generator circuits in our website that you may like to read;

1. Doorbell Circuit

2. Multi Tone Alarm Circuit

3. Scream Generator Circuit

4. Musical Horn Circuit

5. Water Activated Musical Bell

  • James Kamsoo
    February 19, 2018

    I am looking for a Dual Tone Timer that is used on Longline Fishing Vessels for the Hooks and Buoys. Ideally we would like to output 12Vdc to activate a Pizeo Siren. Plus have the first tone triggered every 4 seconds (preferably adjustable from 2 – 10 Seconds), After 4 Beeps on the first tone a second tone is sounded but of a different sound level. Ideally the first Tone is to hook the hooks onto the line and the second tone is for the Buoy to be hooked on to the line. Willing to elaborate more if i am not understandable. Thanks and hope we can work together on this.

  • Jason
    September 17, 2012

    I built this circuit but get more of a convenience store door alarm out. Dosn’t sound like a train at all. The only difference is I used two 555 timers and they are not the same. One is a 7555 and the other is a 1455. Could this be my problem?

  • sanjay
    August 25, 2009

    sir can you tell me how to make tones of bird???

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