I CAN SOLDER Kit 2019

Learn How to Make a DIY Electronic Siren Generator circuit that can produce police car siren, emergency ambulance siren & fire brigade sound using the IC UM3561a Siren Tone Generator.




The circuit only requires a few components and can be put together in a couple of hours. Since the siren is multipurpose, it can be easily configured to suit it's vehicle's siren requirements.


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Parts & Tools


All the electronic components and tools can be found in the Bill of Materials (BOM).


UM3561 Explained

Picture of UM3561 Explained

Picture of UM3561 Explained

Picture of UM3561 Explained

Picture of UM3561 Explained

Picture of UM3561 Explained

The UM3561 is a low-cost, low power CMOS LSI designed for use in toy applications. Since the integrated circuit includes oscillating and selector circuits, a compact sound module can be constructed with only a few additional components. The UM3561 contains a programmed mask ROM to electronically reproduce alarm sounds.


Circuit Schematic

Picture of Circuit Schematic

Only one of the Siren tunes can be played at a time. This is determined on the basis of the position of the SP3T Slide switch. The switch has three positions which will connect the common terminal with VCC, GND or NC in order to fulfill the Truth Table.

The 220KΩ resistor is used to set the oscillating frequency of the IC.

A dynamic speaker is driven with an external NPN transistor. An SPDT switch is used to turn the circuit ON & OFF.

Eagle Schematic: GitHub


PCB Fabrication


Picture of PCB Fabrication

Picture of PCB Fabrication

Order PCB: PCBWay

Eagle PCB Board Layout: GitHub

Printable PDF: GitHub

I fabricated the board using the Iron Method.

I drilled four mounting holes in each corner with a diameter of 3mm.

The PCB size is 3.3cm X 3.3cm .


Circuit Assembly

Picture of Circuit Assembly

Picture of Circuit Assembly

Picture of Circuit Assembly

Place and solder all the components onto the PCB. Double check components with polarities. Lastly, solder the Power adapter and speaker to the PCB.


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Are you an engineer or hobbyist who has a great idea for a new feature in this project? Maybe you have a good idea for a bug fix? Feel free to grab the schematics from GitHub and tinker with it.

If you have any questions/doubts related to this project, leave them in the comments section and I will try my best to answer them.

https://github.com/jonathanrjpereira/UM3561-Siren-Generator

https://www.pcbway.com/project/shareproject/Siren_Generator.html

Apr 22,2019
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    • J*****aus from CZECH REPUBLIC, THE
      If you got a low score from me, I don't think you fit for I can solder content. Sorry for that, at least I tried to rate your design. I am an artist. I design electronics and brass wire sculptures. www.jiripraus.cz
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      NOTE: If you have a project that I don't think is for beginners (or I don't understand what it is/lacks documentation) - you'll automatically get a low score from me even though your project is really cool. Sorry! ABOUT: Author of Electronics For Kids. Creator of Ohmify.com and the electronics blog build-electronic-circuits.com.
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      Ever since I was a kid, I love tinkering with anything that involves energy from toys to cellphones. I love designing and creating projects that could be innovative with the use of electronics. I was also appointed team leader of the University of Sto. Tomas team for the Shell Eco-marathon Philippines Competition in 2018.
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      My name is José Ramón Pueyo, I live in Spain. For more than 40 years he has worked in the radio communication sector, mainly with RF equipment and developing control and monitoring systems.Five years ago I opened a channel on YouTube (J_RPM) in order to share some developments and divulge technical information.
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