Others: hardware and software

Hi everyone, I have design input protection for a CAT4 voltmeter. The Voltmeter need to measure AC+DC simultaneously. The input impedance is 10M ohm. At the moment i have an mov and a PTC as input protection that clamps at 2kv.I need some sort high speed voltage clamp either at the input of the buffer (2.5Vpk) or further up the voltage divider (flexible).As the input impedance it at 10Mohm, the bias current seems to be an big issue as it skews the voltage value.  I have found a BJT circuit that has low leakage and is high speed but i cant seem to find any analysis on the design. (attached) I have also heard there can be some sort of fet circuit that also has ultra low leakage I'm open to any suggestions :) thanks in advance

What media is good reliable for long term archiving data storage? SSD or HDD or MicroSD card or USB Flash Drive?

Hi ST,I have some doubts related to writing to M24M02E-F EEPROM.DS14157 (Rev 1 - December 2023) in section "6.1.2 Page write" states:1. "The page write mode allows up to 256 bytes to be written in a single write cycle"How is this achievable since the first two bytes are used for memory address and typically no more than 255 bytes total can be send over I2C in a single cycle? If I am correct, actually only 253 memory bytes can be written in one cycle. Please confirm/clarify.2. "After each transferred byte, the internal page address counter is incremented."How is this relevant? How the internal page address counter can be used during write operation? Does it potentially affect read operations only?3. It is completely unclear to me what section "6.2.6 Minimizing write delays by polling on ACK" tries to explain.Is it some way to continue write operation without resending memory address? Unfortunately, it seems that it is possible only when reading data.

I am trying to port ErikaV3 RTOS on STM32 H7 and I am facing difficulties with the eclipse configuration related to STM32  if there is documentation for it, please forward it 

Due to end customer request, could we ask for RoHS and Halogen test report of ST:M34E04B-FMC9TG test date after 2023/08/30?

Hi, I am trying to get more info on what I believe is EEPROM chip, it is in Haldex 5th generation and trying to find same or similar replacement, as I have more and more faulty, corroded units that I could repair.Any help welcome, Thanks all

Is this available anywhere?  This is the Mahindra Scorpio Car BCM chip

Hello, This component, EMIF02-USB03F2, is listed as EOL. Do you have a direct/indirect replacement?Thanks, 

Hello,As part of our new automotive project, we have selected the ST eFuse model VNF1048F. Could you please confirm if this part supports SPI operation with daisy chaining? If so, could you provide relevant documentation or materials to support this feature? 

We have the goods part number: M4T28-BR12SH1.On the goods have the number: 9917W. Is it the lot number or other meaning?I hope to have your consult because our technician had different ideas on this number.

Hi,I'm a beginner in embedded systems.I'm trying out one thing that is I want to generate two different frequencies (100hz & 10hz) with both at 50% duty on TIMER 4 CH1 PWM Generation and TIMER 4 CH2 PWM Generation . Whether it is possible to generate different frequencies in same timer or is there any other method to generate it in STM32F103C8 blue pill kindly help me I'm stuck. 

A high-frequency DC testing power supply product that uses LM235 to measure the temperature of the heat sink (aluminum), and the measurement circuit is shown in the above figure:The temperature range of the radiator is also within the temperature range of LM235 (TO-92/-40 ℃,+125 ℃). The product is placed in a high-temperature box for 40 ℃ full power aging test. The maximum temperature of the aluminum heat sink is about 90 ℃, and the aging test time is 6 hours;During the aging process, if the temperature value detected by LM235 (voltage between measurement positions ① and ②, refer to the circuit diagram) is about 20 ℃ higher than the actual temperature (aluminum radiator), it will cause the product to have a false alarm (HOT-ERR);Question 1:This temperature measurement circuit has not been adjusted in any way, and LM335, which has been used for 23 years, has basically not had this problem; Recently, there have been multiple instances of LM335 being damaged, and now replacing it with LM2

Posted on April 14, 2016 at 08:28Hello, where can I find the spice model of L6598D? I really appreciate it and thanks in advance! Regards Ras #l6598-spice-model-.subckt-.mod

Hi Team,Could you please advice the Body Marking of M24512-DRDW8TP/K? Thank you advance.

Hi friends, I have need to know about pin details of one sensor. I am using MQ-7 sensor interface with Stm32  for my project purpose and I design one custom made PCB design. So ,I buy MQ-7 sensor separately that sensor doesn't indicate any start point of pin like 6 pins are there in that sensor. But the manufacturer does not indicate which pin is first pin. I try to find browser it shows separate that 6 pins in 3 category like A,B,H. But I don't know which is A and B and H.So, I need your help.Thank you for value time and Response.I have attached MQ-7 sensor picture in below.  

  Need Prop65 Certificate for STM32F413RGT6511-USBLC6-2SC6

I have recently started learning STM32. Now I`m trying to send data from one Nukleo board to another via NRF24L01. I have already tried to use couple of libraries i found on the internet. But it didn`t work properly. I have read the documentation for both nrf24 and NUCLEO-F303RE and wrote my own library based on that. All i know that SPI part and "NRF24_Read_Buf", "NRF24_Write_Buf", "NRF24_ReadReg", "NRF24_WriteReg" works just like it should(i tried to write/read registers and buffers). But date still don`t comming to receiver. Status register of transmiter says "maximum number of retransmits". Pls help me fix it. Both receiver and transmiter projekts are in NRF24.rar. Library is NRF24.h and NRF24.c. Here is cube part: + how it conects:English isn`t my first language so sorry about mistakes.) 

Please could I have help identifying the component in the attached image to find a suitable replacement as it is shorted. Many thanks, Jazz. 

We are looking to replace our use of M24M02-DR with M24M02E-F as it is available as TSSOP (the smaller CSP would also be useful but it seems no distributor is touching that at the moment) and cheaper (as I guess ST are promoting the replacement of the -DR). We would like to use two M24M02E-F on the same I2C bus. Unfortunately I don't think we can but thought I would just double check here.Is C2 (of register CDA) the only device address bit that can be configured? The problem is that we have another I2C device on the bus with address 10100xxx and so must have C2=1. I find it puzzling how ST have gone to the complexity of allowing a software configurable address (great) but only one bit (not great)! Surely it would have been possible to make another address bit configurable for memory use at the same time as they did it for C2? (Edit - I see this can be C2, C1, C0 in smaller mem devices. Ah well, no good for us.)Have I interpreted things correctly?

We want burn LINUX image to NAND flash locatted? We follow the guidence of STMC2. But what should we do next? We can't find any guidence for next step.

Hi,I downloaded stsw-rfsol001 then run SETUP.bat file to install STWPLLSim tool.When I open STWPLLSim tool the error show in firgure below, Please fix this problem ?Thank you very much.

Hi,I have an IC from ST where the case code is 464R. Please find the attached screenshot. Can you please help me figure out the IC's part number? I cannot find the correct information on internet. Thank you.Best regards,Adarsh

I am using STWPLLSim tool to simulate loop values for STW81200. After installing, when I start the program the following LIBRARY NOT FOUND error occurs:java.lang.UnsatisfiedLinkError: C:lProg ram Files (x86)1STMicroelectronicsISTWaLSim_v5.31Loaderltimeresp.d11: Can't find dependent librariesAnybody has solve this problem?

Hi, I used eDesignSuite to base my Flyback Converter design with wide range input power supply and 60V-2A output. All the components look perfect to me, but the loop control with the proposed TL431 appears to be operating at about 60V. Looking in the datasheet the maximum voltage Vka is 37V. Can I trust this schematic regarding the control loop? Or is it in fact wrong and would burn the TL431?The schematic generated by eDesignSuite is this:

Hello!Please tell me what the letter K means in the first line of the C56WK marking?My colleagues say that the ending can be either P or G. The Chinese supplier sent a photo before purchasing.We need 4 psc.Thank you!Best regards, Jack