drmina2023 Posted May 16 Report Share Posted May 16 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. Quote Link to comment Share on other sites More sharing options...
HarryA Posted May 16 Report Share Posted May 16 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 Quote Link to comment Share on other sites More sharing options...
drmina2023 Posted May 17 Author Report Share Posted May 17 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 . Quote Link to comment Share on other sites More sharing options...
HarryA Posted May 17 Report Share Posted May 17 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. Quote Link to comment Share on other sites More sharing options...
drmina2023 Posted May 19 Author Report Share Posted May 19 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. Quote Link to comment Share on other sites More sharing options...
HarryA Posted May 19 Report Share Posted May 19 Just for you, anyone else there would be a fee😏 Quote Link to comment Share on other sites More sharing options...
drmina2023 Posted May 19 Author Report Share Posted May 19 Sure, next project ideas will be paid for sure, Really you made my day, I'm gonna test and tell you about the results . Quote Link to comment Share on other sites More sharing options...
loribennms Posted May 21 Report Share Posted May 21 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. Qui sono elencati diversi approcci per interrompere l'abbonamento a Eolo Distire. Le modalità per cancellare l'abbonamento al servizio internet Eolo possono variare a seconda del tipo di contratto sottoscritto. Di solito, i metodi per terminare il servizio includono: 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. Quote Link to comment Share on other sites More sharing options...
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