mcu

Hey I need to measure some signals that can be maximum 15-20V. But my MCU work only with 3.3V. What is the best way to do that? I thought about resistors divider. there are more ideas ? I want that the samples will be clear without noise. Thank you Very much

Hello everyone, I'd like to request some help with an ECG Holter Receiver Board. This is my first time designing a MCU board. I am basing this design on this article from Analog Devices: https://www.analog.com/en/resources/analog-dialogue/articles/ecg-front-end-design-simplified.html As some...

I want to send a GET request to a server, so I connected the microcontroller (STM32) with an Ethernet module, as the microcontroller does not have a built-in Ethernet feature. I am using these two libraries: #include "stm32f4xx_hal_uart.h" and #include "stm32f4xx_hal.h". My GET string is: char...

I encountered an error while programming my STM32 microcontroller using ST-Link Utility. The exact error message is "The ELF loader sector erase function fails." Can you help me troubleshoot this error?

Hi, This is my first time designing a PCB and I just wanted to check that I had done it correctly or if there's anything I can improve. The main focus of this design is to scale down Voltage into a GPIO entry on an MCU and then scaling back up the voltage coming out from the MCU to the OEM...

My slave MCU is STM32G0B1 and for master Im going to use SOM which has 3 SPI interface.

Hi! Just for context, few months ago I wrote this post: https://forum.allaboutcircuits.com/threads/help-powering-an-mcu-when-a-switch-changes-state-with-auto-turnoff.196069/ My idea is to make an independent power latch that will monitor state changes from a reed switch (or tbf any kind of...

Hello guys, I need to interface my 3.3V MCU IO ports to a connector that will be connected to either a 5V or a 3.3V system. I learned about the SN74LVC4245A, an 8-bit bus transceiver with two separate supply rails VCCA(5V) and VCCB(3.3V). but in the datasheet, it states that the control...

I am pretty new to this all so forgive me if I didn't post this under the right community since I wasn't 100% sure which one to post in. I have a rangefinder that uses an HT1621B chip that sends signals to a custom 32-pin LCD. I am wondering if there are any MCU or board that has a 32 FFC cable...

wlpThis circuit is a low side current measurement of a motor using a shunt resistor and adc of a mcu. However, I do not understand the reason or use for the 100k internal pull down resistor, 10k external serial resistor and the capacitor. Anyone can help?

Hello, I am looking for STM32F417IGT6/400pcs and STM32G474RET3/960pcs. if someone here has excess stock to resell, pls contact me: <snip> Moderator edit: email address removed to prevent spam. A member can contact you via private message if required.

Hi there, I'm looking for help with a FAT filesystem project. I have a special made measuring device with its own on board ARM MCU and RAM memory. Its is essentially a device that measures impedance through a tungsten filament as that filament is drilled at high RPM through a non conductive...

After soldering up the parts, the DMA process on my MCU's (ATSAML21J18B-AUT) is breaking. I use an IR oven (T962A), cover the MCU in a heat shield, and reflow using low temp solder (the process gets up to 180C). With an iron at 200C, I will touch up pins with bad solder joints. The MCU is rated...

Hi everyone!, im currently a student, i know about electrical circuits, basic electronics, digital circuits, basic digital design, microcontrollers, programming and other things, im a biomedical engineer and currently im working as service engineer (giving maintenance to medical equipment) but...

Hello everyone, I am working on a low cost vending machine with the ESP32 and as you may know, it is necessary to properly protect the components to prevent users from trying to steal money or damage the components. The PCB has a TFT display and several multiplexers to communicate the ESP32 with...

Hi community, I'm Marco from Italy, I'm an electronic developer and I like automation in general. I would like to share my problem with community, to know what do you think about this. I'm developing an electronic board for general automation purposes, on this board there is a STM32F104 that...

Hi there, I want to use mcu for some automation, mostly i use mcu for controlling some stepper and servo motor and also some transistor but there is one problem that in my environment there is a lot of industrial 3 phases motors. What is the best mcu for my occasion? (Specially i can program it...

Hello Experts, My application is a commercial battery powered device. The 2 most important thing for me is to achieve "accuracy in metering" and "Increase battery life" of my product. 1st thing I'm able to achieve using MSP430FR6047 chip for water metering. 2nd thing is what I'm working on...

Hello all, Caution, I am a newbie to MCUs. I am looking for a low cost MCU board with Bluetooth for communication with mobile app. I have purchased NodeMCU which comes with onboard WiFi. However, I would like to talk to MCU via Bluetooth directly. If I use NodeMCU or ArduinoNano, I would have...

Hi, I am connecting a sensor to PICAXE08M2 MCU. The sensor is read in pin C.4 and when it is off is 1.8V and 5V when it is fully ON. I need to offset the 1.8V. I need to write the codes in Basic. The ADC is 8 bit and the maximum value would be 255. My codes are below. Main: Readadc C.1...