Analog and audio

I'm trying to work with P-Nucleo-IKA02A1 but I have some problems: 1) The data of CO that I take from the electronic circuit board with the software UNINUCLEO are not  plausible. The value (made in ppm) is negative and, after a small  physical pressure on the board, it changes to 2600 ppm more or less. Moreover the value doesn't change even if I create an initial fire on the transducer.2) How can I send the data via BLE to an Android application?

Im working on an old PPI car audio amplifier. I have a blown transistor but cant find any info about it. Everything i know is that it was made by motorola and S T in top corners P4262 across the middle R125 under that. If possible please provide suitable replacement.

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I am using TS393 micropower dual CMOS Comparator for last 8-10 years, in my schematic. The PCB is heavily lacquered to protect against moisture damage.Today, in one working board, my team was changing TS393 associated resistor. After the change we noticed the Baord has short circuit in its power pins.Which was traced to Vcc+[pin8] Vcc- [pin 4] of the TS393.What could be the reason for such a absurd failure ?I checked the faulty TS393 chip, does not have any other pins of the six pins shorted with Vcc+ or Vcc-.Curious to know what all can lead to such internal shortage in TS393 power pins ?-Namdeo PatilSenergy Intellution Pvt LtdMumbai, India

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I do not know how this circuit works.​Please interpret this circuit. thankyou

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Posted on July 05, 2018 at 18:03Hi everyone,I'm looking for some help after many days of pain.I'm trying to write basic uSD to I2S application, but the result is really ugly.I'm using STM3240G eval board and Adafruit MAX98357 board.I'm using fatfs and sdio to read a wave file on my uSD card.I'm filling 2 or 3 buffers and sending data through I2S at the same time.I've configured the I2S DMA as following : Mode Circular, Data Width : Half Word, Burst Size : Single.My I2S is configured as following :Mode Master TransmitMSB First16 bits data on 32 bits frame48 KHzClock Polarity LowSo first, i initilialize the fat file system and read the audio file. I then extrac the header before filling my uint16_t buffers.Then, i use 'HAL_I2S_Transmit_DMA' to send the data from my buffer to I2S.The 'HAL_I2S_TxCpltCallback' is then used to change the buffer sent and the buffer to fill.So, each time a transfert is complete, i send the next buffer through I2S DMA, and refill the last buffer

Posted on July 11, 2018 at 07:50Just wondering if there is any sample code or application notes....RegardsAnthony

Posted on April 08, 2018 at 21:30Hi, I need a free sample of TDA7265B. It is a class-AB two-channel power amplifier. I didn't find in a list of free samples of integrated circuits of its class. There is a TDA7265 chip, it is very similar but not the same. What ca I do in this case? Thank you in advance.

Posted on July 07, 2018 at 12:17Hi,Trying to program STDP6028,Able to read registers from GProbe tool. But when I try to program Hex file. Tool shows progress of flash write. But after complete, no other prints come on the console. On very reset I will only get 'IROM 1.2' on UART. Please guide me how to flash to external flash and boot from it.Regards,Dileep

Posted on June 22, 2018 at 11:56Placing a CS30A next to a 0.05ohm sense ohm successfully measured output currents from 24v boost converter.Since the microcontroller was not nearby, to reduce noise thought it might be better to place the CS30A next to the uC (with a low pass filter) and run two lines to the sense resistor. On the grounds that a) the longer traces should be low impedance one; b) any noise picked up would cancel in the differential pair;Doesn't work well. According to my Fluke multimeter, the correct mV differential arrives at the CS30A, but it outputs voltages that are considerably less than the 20 times multiplication expected. So the ADC reports numbers for unrealistically low currents.It's difficult to measure noise but the scope (with ground probe across the CS30 input pins) suggests the differential pair has picked some up.Is it possible that it's the noise which is preventing the CS30 (tried multiple devices) from giving good results?Any comments or sugg

Posted on June 21, 2018 at 21:44Hello everyone. I would like to know if is possible to use the CS30 current sense amplifier with inductive loads, i.e. something similar to the coils of solenoids used in automatic car gearboxes. Thanks in advance.The operating conditions are 12V and about 1 to 2A.

Posted on May 03, 2018 at 05:29Hi, I'm looking for an op-amp to buffer a signal and provide an output of 2 -> 5V to a load of 100 - 200R. This would require driving the load with 50 - 100 mA. The LMX358IQ2T has a specified output source current of 60-70 mA, but I'm not sure if this just means an absolute max or a max where the output voltage signal will be maintained? Will the voltage output have degraded substantially at roughly this current? If so, what are my options for op-amps capable of driving 50-100mA over 2-5V without significant degradation?Many Thanks,Dave

Posted on June 21, 2018 at 11:14The stm32f429 fs usb then type-c mouth to do the host, then the headset device can achieve this program?

Posted on June 21, 2018 at 11:13stm32f429的fs usb 接type-c��主机，接耳机设备这�方案�以实现�

Posted on June 18, 2018 at 09:46Hi. I'm soohoon.I have bluecoin device.I have question.1. Now Beamforming is fixed in the one direction I set,    I want to make automatically BF in the direction of sound.What should I do?2. Now I know souce Localization only angle.   I think it is possilble that I know distance using 4 microphone.Is it possible? if it is possible, How I know it ?#bluecoin

Posted on June 18, 2018 at 09:14Hi,I am trying to download AP workbench but it says file does not exist, please help me where to download this file.Regards,

Posted on March 02, 2018 at 11:13Hello, team.My customer is using STPA003CD-48X and developing new H/W.In the datasheet (5.3.1 Short circuits and open circuit operation),>In case of short circuit to ground or Vcc, the amplifier exits from the three-state condition>only when the output returns inside the limits imposed by an internal voltage comparator.Could you please explain more details like concrete method to detect the short?>When a short across the load is present, the power stage sees an over-current and is>brought in protection mode for 100 ?s.What is the threshold current to detect the short?Regards, Kurosawa #stpa003cd-48x

Posted on April 09, 2018 at 14:08Hi, I need FIT and MTBF data for LM211D/DT. I searched the website but I did'nt get it. Can anybody help???

Posted on April 08, 2018 at 21:27Hi, I need a free sample of TDA7265B. It is a class-AB two-channel power amplifier. I didn't find in a list of free samples of integrated circuits of its class. There is a TDA7265 chip, it is very similar but not the same. What ca I do in this case? Thank you in advance.

Posted on March 27, 2018 at 06:14Hello      I am trying to design a 2w transmitter with frequency range of 72mhz to 73mhz, I want to use PD84008-E;I've download  it's ADS model, but I am failed to unzip it into ADS(as below picture), because no lib.defs in the ADS model folder;where can I get lib.defs??       

Posted on June 23, 2017 at 13:50Hi,IBIS model not available for this  part number . L9663-1Where can i find the IBIS model ?Is there any I/O model i can use for this part number?Thanks and RegardsArunkumar K#l9663-1