Hey Electro Guruji I recently bought two of those UM3561 siren generator ICs, and I've tried many different circuit variations and I cannot get it to make the siren sounds. I'm using the exact same components as you show in your video, but I'm not sure whether my chip is the reason my circuit isn't producing any sounds. I tested one of the chips with my multimeter to check if it shorted inside, and the chip seems fine until it's powered in the circuit, then when I test the chip, my multimeter beeps so there may be something wrong with it, I don't know :( Maybe you know a trick to getting the circuit working? This project is very important to me, please help me out with this ASAP, thanks a lot
Hey so I had similar problems with my circuit when I initially began to design the circuit. I made the circuit according to the recommended application circuit given in the datasheet but for some reason it didn't work well. So I changed the speaker and that worked. In my case, the internal speaker wires were loose. These are the general debugging steps I usually follow: 1. Start with the power supply. Check if you're getting 3V from your batteries at the PCB. The IC has max voltage of 3.6V. Do NOT exceed this value. Try replacing them with new ones. 2. Check the value of the Oscillation Resistor. The datasheet recommends 300kohm but in my case 220k works well too. 3. Is your transistor working. Check transistor voltages with a multimeter. 4. Check the speaker. Connect it across a battery and see if it produces some white noise to see if the speaker still works. 5. Even if the Tune Selector switch is not working properly.... The IC defaults to the Police Siren tune. 6. Check the PCB traces for cuts. Check your soldering for shorts and cold solder.
@@ElectroGuruji Hey, so I checked all of the following points you gave me, what I found is that a battery connection in the PCB was somehow in contact with the top copper layer. Anyway, I fixed that connection by scraping around it, now the circuit gets power but the IC is heating up way too much, and still no siren noises heard from the speaker, what do you think may be wrong here?
Don't forget to add this resistor! A transistor without a resistor on the base is like an LED with no current limiting resistor. Recall that, in a way, a transistor is just a pair of interconnected diodes. We're forward-biasing the base-emitter diode to turn the load on. The diode only needs 0.6V to turn on, more voltage than that means more current. Some transistors may only be rated for a maximum of 10-100mA of current to flow through them. If you supply a current over the maximum rating, the transistor might blow up. Hence, the series resistor between base simply limits current into the base. Check out the Instructable for more information: www.instructables.com/id/How-to-Make-a-Siren-Generator-UM3561-Police-Ambula/
Yes, you can replace the speaker with an amplifier. You can simply remove the speaker (and the transistor+resistor connected to the speaker) and connect the Output (Pin 3) of the UM3561 to the Amplifier Input.
Could the slide switch be replaced with an interrupter? Like, if there was a magnetic connection. If a net was hit and a connection was broken the alarm would sound. I am looking to make a sports goal. Sorry, I am a total novice.
The IC includes an oscillating circuit. But the oscillating frequency is set by the external resistor. The datasheet doesn't mention oscillating frequency for a particular resistance value. Hence you will have to measure it on a CRO/DSO. Note: You can vary the oscillating frequency by replacing the resistor with a potentiometer.
Hi Sandeep, I have attached the PCB design files in the video description. You can learn how to make the PCB using those files by following this tutorial: th-cam.com/video/XgaGXNqyo9c/w-d-xo.html
Hi Ahmed This project does not require any coding. You only need to build the circuit on a PCB or breadboard. You can find the full project tutorial instructions: www.instructables.com/id/How-to-Make-a-Siren-Generator-UM3561-Police-Ambula/ You can also find the Circuit Schematic and PCB board layout: github.com/jonathanrjpereira/UM3561-Siren-Generator Feel free to ask any other questions related to the project and don't forget to Subscribe ✌️
Simple and informative.
Subscribing
Hey Electro Guruji
I recently bought two of those UM3561 siren generator ICs, and I've tried many different circuit variations and I cannot get it to make the siren sounds. I'm using the exact same components as you show in your video, but I'm not sure whether my chip is the reason my circuit isn't producing any sounds. I tested one of the chips with my multimeter to check if it shorted inside, and the chip seems fine until it's powered in the circuit, then when I test the chip, my multimeter beeps so there may be something wrong with it, I don't know :(
Maybe you know a trick to getting the circuit working?
This project is very important to me, please help me out with this ASAP,
thanks a lot
Hey so I had similar problems with my circuit when I initially began to design the circuit. I made the circuit according to the recommended application circuit given in the datasheet but for some reason it didn't work well.
So I changed the speaker and that worked. In my case, the internal speaker wires were loose.
These are the general debugging steps I usually follow:
1. Start with the power supply. Check if you're getting 3V from your batteries at the PCB. The IC has max voltage of 3.6V. Do NOT exceed this value. Try replacing them with new ones.
2. Check the value of the Oscillation Resistor. The datasheet recommends 300kohm but in my case 220k works well too.
3. Is your transistor working. Check transistor voltages with a multimeter.
4. Check the speaker. Connect it across a battery and see if it produces some white noise to see if the speaker still works.
5. Even if the Tune Selector switch is not working properly.... The IC defaults to the Police Siren tune.
6. Check the PCB traces for cuts. Check your soldering for shorts and cold solder.
@@ElectroGuruji Thanks a lot for getting back to me! I will try your steps and see if it will work now ☺
@@ElectroGuruji Hey, so I checked all of the following points you gave me, what I found is that a battery connection in the PCB was somehow in contact with the top copper layer. Anyway, I fixed that connection by scraping around it, now the circuit gets power but the IC is heating up way too much, and still no siren noises heard from the speaker, what do you think may be wrong here?
That may have shorted the circuit and destroyed the IC. Try replacing the IC.
@@ElectroGuruji Yeah, I'll have to replace it...
Hi, Thanks for this good project. How to operate above circuit using 5Volt 1.35amp power supply?
Its awesome!
Can you tell me the purpose of the two 220 ohm resistors(with led and transistor)?
I removed them and the circuit still works...
Don't forget to add this resistor! A transistor without a resistor on the base is like an LED with no current limiting resistor.
Recall that, in a way, a transistor is just a pair of interconnected diodes. We're forward-biasing the base-emitter diode to turn the load on. The diode only needs 0.6V to turn on, more voltage than that means more current. Some transistors may only be rated for a maximum of 10-100mA of current to flow through them. If you supply a current over the maximum rating, the transistor might blow up.
Hence, the series resistor between base simply limits current into the base.
Check out the Instructable for more information: www.instructables.com/id/How-to-Make-a-Siren-Generator-UM3561-Police-Ambula/
hello can we replace the small speaker with an amplifier?
Yes, you can replace the speaker with an amplifier. You can simply remove the speaker (and the transistor+resistor connected to the speaker) and connect the Output (Pin 3) of the UM3561 to the Amplifier Input.
@@ElectroGuruji thank you for your reply! keep up the good work man!
Could the slide switch be replaced with an interrupter? Like, if there was a magnetic connection. If a net was hit and a connection was broken the alarm would sound.
I am looking to make a sports goal. Sorry, I am a total novice.
Yes in theory that would work
Hey! Well done! I have a question about your project. How do you know the frequencies for each type of siren? Thank you!
The IC includes an oscillating circuit. But the oscillating frequency is set by the external resistor. The datasheet doesn't mention oscillating frequency for a particular resistance value. Hence you will have to measure it on a CRO/DSO.
Note:
You can vary the oscillating frequency by replacing the resistor with a potentiometer.
FROM WHERE I CAN BUY THIS COMPELTE READYMADE CIRCUIT
www.pcbway.com/project/shareproject/Siren_Generator.html
can i give 5 volt power supply to this circuit?
The IC has a typical 3V operating voltage.
So you can't directly give 5V to the circuit. You will need to reduce the 5V to 3V.
@@ElectroGuruji thanks....
Sir Mujhe ye PCB Chahiye
Hi Sandeep,
I have attached the PCB design files in the video description.
You can learn how to make the PCB using those files by following this tutorial: th-cam.com/video/XgaGXNqyo9c/w-d-xo.html
Hi! I couldn't find the code for this project...it would be appreciated if u could leave the link to the code
Hi Ahmed
This project does not require any coding.
You only need to build the circuit on a PCB or breadboard.
You can find the full project tutorial instructions:
www.instructables.com/id/How-to-Make-a-Siren-Generator-UM3561-Police-Ambula/
You can also find the Circuit Schematic and PCB board layout:
github.com/jonathanrjpereira/UM3561-Siren-Generator
Feel free to ask any other questions related to the project and don't forget to Subscribe ✌️
🅰️🅱️🕉️🕉️GOOD TEACHING FOR YOUR CHANNEL🚦THANK YOU SO MUCH VERY VERY GOOD 👌👍👌👍💃💃💃😁😀😂😝😝
Subscribe karo fir
how to make a earthquake siren sound?
Unfortunately you cannot use this IC to make an Earthquake Siren. But I will definitely make this into a project in the future.
@@ElectroGuruji What IC do you use to make a earthquake sound? and if the speaker where to be louder what will some of the components change?
You can make a Siren with a variable frequency using 2 555 timer IC. You can that circuit to LM386 audio amplifier to increase the volume.
how to make a earthquake siren sound?