Search results

I have already checked the ground between the Audio card and the TEENSY card, it is OK but I am not in the office at the moment, I will check this tomorrow. THANKS

Thank you, I'll try it and let's see what happens

Yes I can reduce the wires and see if there is a change.

Hello, I have a Teensy 4.0 and a Audio Card (REV.D), after looking the video about the example Part_2_01_First_Design_Tool_Use, I have something but it looks like a constant frequency and not the music I put on the SD card. I made the cabling between TEENSY 4.0 and the Audio card Here the PINS...

Of course you're right but I forgot to specify that I wired the pins : SDA, SCL, MCLK, SCLK, LRCLK, +3V, GND, DIN/TX, DOUT/RX between the Audio card and the TEENSY 4.0 card. In this case the digital data will be recovered by the TEENSY card. Of course, I watched the video and read the...

I can modify this But the ID is always the same (i2s2_1)

Hi, I don't need LINE_IN -> LINEOUT. I think this configuration is fit for my application. A little strange, with a blank Design I have i2s2_1 and it's not the same figure you showed me (you have i2s2). How to delete all and have a new blank Design ? This configuration corresponds to ...

I'm just trying first to familiarize myself with the tool (Audio System Design Tool), with the LINE_IN, I can use a frequency generator and see in the I2S_DOUT. After my understanding your green line leaves I2S_DIN -> LINEOUT, but I think I don't want to do this. So after this 'info'...

Hello, I have a Teensy card 4.0 and a audio card REV.D and I would like to have this configuration Is this configuration correct ? I work with a single mono input (either the left or the right) Thank you for your helps Regards

Hello, For the Teensy 4.0 how should I do the wiring with the audio card ? Do you have an existing diagram ? Do I need other things to communicate with the Audio card ? I have this picture : I think it connects directly to the top of the audio card, right ? Does it have USB cables, connectors...

You're right. Probably it's the best way. Which Teensy card is compatible with the REV D audio card ?

Is it possible to have just the code for configuring the LINE input to the I2S_OUT output ? So that I can visualize ?

Hello, Thank you for this link, I'm going to read. Just one point, I don't use the TEENSY card but an STM32 is compatible with the library I suppose ?

Hello, I would like to have tips for configuring the audio card CODEC. I configured a LINE input (left channel) and an I2S_DOUT output and I get the following signals. Here my code : void SGTL5000_init(void){ write(CHIP_ANA_POWER_ADD, 0x0432); // VDDD is externally...

Thank you for your advice, impossible to make a dividing bridge with resistors (too much parasite), I have a -40 dB attenuator but I think the level is a little loud for a microphone input (generally around -60 dB). Probably I'll enter the signal by LINEINL, in this case I can enter a 0 dB...

Thank you for this precision but my frequency generator does not generate an offset. Now the microphones need bias for their operation, and my generator doesn't need this bias voltage. I'm not sure of my connection.

Hi, GBF (I mean frequency generator), I've just enter a sinusoidal adjustable in amplitude, gain and frequency. I don't have any offset on my signal and according to the diagram there is already a decoupling capacitor 0.1µF on the board, right ? I think the gain is too high (-40 dB), a...

Hello, I've a audio board, I don't have a microphone and I connected a GBF instead (with a level of -40 dB), is it okay on these inputs ? Thanks in advance.

Thank you for your helps. What is the TEENSY card compatible with Audio Shied REV D card? Do you have a reference for me to buy? Is there anything else I need to buy to use the audio shield card ?

Hello, Thank you for your helps but I use this CODEC with STM32L55xxx not with Teensy but when I put the probe on the MCLK (in blue) and the SDA signal. I have nothing on pin 23. I must have a signal on the MCLK pin ? Thank you for your helps.

Hello, I have a audio Shield REV D, after posting on Topic how should the audio card be connected I did not get an answer. I have no I2C communication with audio card. There is no ACK. I address to the correct address of the Audio card which is for a write is 0x14 but I have no ACK of the...

According to this schematic i think it is PIN G

Hello, I would like to know how to connect the supply 3.3V to this audio Board. I connect to this pin (see in this picture) But but I don't think it's the GND of the audio Board. Do you know where I can connect to ground ?

Thank you but I don't use Teensy, I use STM32. I would like some information. With this link : https://www.pjrc.com/teensy/gui/index.html I was able to generate the code. But on the other hand I miss '.C' and '.h' of the code, do you know how I can get it ? where can i find the component...

Hello, About the Audio Card, do you know where I can find a mic to use the microphone input of this card ? or any microphone on the market will do the trick ? I can see also this mic . Does it fit for Rev D Audio Card Thank

I don't understand your answer, I bought a shield audio card from you and I asked how it works with my microprocessor, and we're in research (in education) and teaching and we do not sell anything and the link on SNAP that I communicated before to you is open source to my knowledge. And this...

Yes you're right. I'm going to go back to the site to review the electronic board in blue to see if there is an additional low-noise amplifier. I'm asking this question to get an expert opinion because I think there is no need to use an additional amplifier why ? I think we can do : 'MIC...

Thank you, now I understand that it is necessary to connect the I2C bus. For the SNAP, I use this link found in this forum https://github.com/loggerhead-instru...ematic/LS1.PDF In fact, in our University (Grenoble) we have an example of this product (By Loggerhead Instruments Inc). I don't...

Hi, Sorry now I can find the correspondence between the Audio Shield (Rev C) audio card with the Teensy 3.x of the SNAP 2 card. But I still don't understand why to use 'SDA' and 'SCL' in SNAP 2 to acquire the signal from a Hydrophone ? Probably to add an additional gain in the measurement chain ?

Hello, After ordering the Audio shield (Rev D) and after download the circuit diagram of the board (SNAP2) I can't see the pin correspondence with the component SGTL5000. Probably the Audio Shield card (Rev D) is design for Teensy 3xx and not for Teensy 4.0. And another point is the 2 pins...

Yes I can see the table but it's mean If I enter a sine 2 Volts peak to peak into the input 'LINE_IN' I have 0 dB ? Probably you're right if you take haft of this value 2/2 = 1Volts and dB = 20.log(Vs/Vref) with Vref=1Volts so you have 0dB ? I'm not sure with this reasoning.

How do you find this value? After me : -3.9 dB = 20.log(Vs/Ve) -> Vs/Ve = 0.63. The value 3.12 V where it's come ?

Yes you're right, after printing I can see this information (sorry I'm old school). After going through the folders I see this file what does it mean exactly? These are measurements made with Hydrophones Clip Level is probably the output of the SGTL5000 'IS2DOUT' ?

Yes you're right, after printing I can see this information (sorry I'm old school).

Yes to add +20 is not as complicated as that. Can I have your electronic schematic please ? In your previous link for David 'LS1.PDF' I can see all components but without no connections. After reflection I uploaded the folder to the 'loggerhead-instruments/snap' I can see under Altium the...

Thus, I missed a step, can you detail how to amplify with -180 dB re 1V/µPa (I'm working between 50 dB and 100 dB) and I have 0.3µV and 0.1 mV. How do you do ?

BTW ? What is it ? (ok By the way sorry for my English) I don't think so, we have a HTI-96-min as Hydrophone and the sensibility is -180 dB re 1V/µPa and if I want to work between +2.5 Volts and -2.5 Volts, my gain (amplifier) is 2.5/0.1mV = 25,000 (88 dB). And with LINE-IN I have only 22.5 dB...

Hi, Thank you about the Gain 62.5 dB, I understand better now. But I have a product that I took measurements on this electronic map After white wires I have the SGTL5000 and I guess the preamp is built into the hydrophone. With only 0.13V I think that there is another amplifier before the...

Hi, Sorry I was doing something else. Yes I need to take the sound under sea and record to an SDcard. Don't worry about the hydrophone (electronic, impedance, single-ended etc...). My Topic is about the maxi gain of the SGTL5000 and nothing else. After reflexion and reading the datasheet I...

Yes and ? what is the relation with the Topic which is to know what is the maximum gain of the SGTL5000.

Yes this value is possible I find for 50-100 dB re 1V/µPa about 0.03 nV - 0.1 mV with -180 dB re 1V/µPa. But the Topic is not about the Hydrophone right ? It's about the codec SGTL5000.

Here it's the specification of the Hydrophone

I'm not sure for this value, how did you find this value ? -186 dB re 1V/µPa is a caracteristic a feature of a Hydrophone not a dB SPL (the sound in the air). Sorry in my previous post I make a mistake : The maxi gain is for me is 40+22.5 = 62.5 dB (SPL)

Hi Paul, Thank you for your answer. I understand for the sample rate one point solved. In the datasheet, I can see so many gain Mix+6dB, AVC +12dB...So my question is what is the total gain of this component ? I need to acquire the sound from a hydrophone (is about -186 dB re 1V/µPa). I must...

Hello, I would like use this card in my project, after reading the datasheet I can see on page 15 that I can have several sample rate from 8 to 96 kHz is it true ? Because on your site it is mentioned only 44.1 kHz. How it's works exactely when you like to change the sampling frequency ? With...

Hello, I would like use this card in my project, after reading the datasheet I can see on page 15 that I can have several sample rate from 8 to 96 kHz is it true ? Because on your site it is mentioned only 44.1 kHz. How it's works exactely when you like to change the sampling frequency ? With...

Let me to summarize our discuss. After my understanding. 1- I modify the mod like this picture as you show to me 2- I buy a 'JLINK EDU' for segger for example and I use the VisualCode like software to communicate with this 'JLINK EDU' 3- I use a standard GDB interface for Debug my mod Teensy...

Sorry for my English but What do you mean IMHO ? What's the hardware probes you use with VisualCode ? Do you have a ref ?

Thank you for your answer. But after your link I can see and use 'J link' but I'm not sure ! I find this link to explain how to modify the hardware with 'Eclipse' (so I suppose it's the same with Visual Studio) ...

Yes maybe you're right perhaps I should try.