Simple Audio sensor board connection to a speaker

[drmina2023]

Hi there Everybody.

As I'm New to electronics, I need your advice, I have an idea of a project that includes a mic connected to speaker, the point that I have a small audio sensor board the I'd like to connect directly to a speaker through an analog circuit and without the use of an Arduino board, here is link to the chip I own for the moment, Sound Detector - Analog & Digital Outputs - RAM Electronics (ram-e-shop.com)

, I hope somebody help me building such ana analog circuit.  

 

[HarryA]

It looks like  the unit you have is designed to work with a high impedance load like the input to the Arduino. Typically for  a LM386  driving a 8 ohm speaker a 220 to 250 microfarad capacitor is used with the negative lead to the speaker.  Try adding one to your unit. see the circuits here:

https://www.ti.com/lit/ds/symlink/lm386.pdf?ts=1684218564218&ref_url=https%3A%2F%2Fwww.ti.com%2Fproduct%2FLM386

 

 

[drmina2023]

Thanks HarryA For your answer, you mean to connect the LM386 directly to the speaker through using a 220 to 250 microfarad capacitor , and ditching the whole board .  

[HarryA]

No, just simply add a capacitor to the  AOUT  terminal  ahead of the speaker from your board.  Can you trace pin 5 of the LM386 directly to the AOUT terminal ?

There may or may not be a small capacitor and resistor connected to pin 5 also.

UPDATE: It look like the board already has an output capacitor. The yellow  227C is a 220 microfarad capacitor. So you do not need to add one. see:  https://www.ebay.com/itm/391354402991?mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5338766894&toolid=20006&

Just connect your speaker to the output terminals.

 

[drmina2023]

Thank You HarryA, Would You Mind, showing me the complete schematic of the sound sensor board connected directly to

the speaker and the power supply, as I'm not sure how to do one. 

[HarryA]

Just for you, anyone else there would be a fee😏

[drmina2023]

Sure, next project ideas will be paid for sure, Really you made my day, I'm gonna test and tell you about the results .

[loribennms]

On 5/16/2023 at 11:14 PM, drmina2023 said:

Hi there Everybody.

As I'm New to electronics, I need your advice, I have an idea of a project that includes a mic connected to speaker, the point that I have a small audio sensor board the I'd like to connect directly to a speaker through an analog circuit and without the use of an Arduino board, here is link to the chip I own for the moment, Sound Detector - Analog & Digital Outputs - RAM Electronics (ram-e-shop.com)

, I hope somebody help me building such ana analog circuit.  

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If you're looking to connect a small audio sensor board directly to a speaker without using an Arduino board, you'll need to design a simple analog circuit to amplify and process the audio signal. Here are a few general steps to consider:

Study the specifications and documentation of the Sound Detector board you own to understand its input and output requirements.

Determine the specifications of the speaker you intend to use, such as its impedance and power handling capabilities. This information will help you design a circuit that matches the speaker's requirements.

Research basic audio amplifier circuits that can be used to amplify the signal from the audio sensor board. Look for amplifier designs that fit your project's needs, such as a single-ended amplifier or a class AB amplifier.

Choose appropriate components for your analog circuit, including resistors, capacitors, and transistors or operational amplifiers. The specific values and types of components will depend on the amplifier circuit you select.

Design the circuit on a breadboard or a PCB (Printed Circuit Board), following the schematic diagram provided by the amplifier circuit design. Take care to ensure proper connections and component placement.

Test the circuit using the audio sensor board as the input and the speaker as the output. Make adjustments as necessary to optimize the sound quality and volume levels.

Please note that designing and building analog circuits requires a good understanding of electronics and circuit design principles. If you're not familiar with these concepts, it may be beneficial to seek assistance from an experienced electronics hobbyist or consult resources such as electronics forums or books on audio circuit design.

[drmina2023]

loribennms , thanks sir for your answer .

This why I'm Here to discuss such a board.

Hi everybody, it seems that I found a better board that is doing exactly what I'm Looking For, 

please check it here, LM386 Audio Amplifier Module (200 times Audio Amplifier) - RAM Electronics (ram-e-shop.com)

and This is the wiring Video, 

 

It's also Cheaper.

I'd like to know your opinion about it, and in case I'd Like to belt a professional plastic enclosure for it, where to find the right place for designing the enclosure to make a model of parts ready for the injection mold.

And If I'd like to run it on AA battery how to calculate the right voltage to run the whole thing, an amplifier board, a mini speaker, and a mic piece.