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A device which includes a central processing unit (CPU), memory, and (generally) an assortment of I/O peripherals (UART, ADC, DAC, general-purpose I/O, I2C, etc.) in a tightly-coupled standalone package.

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I’m using an EEPROM where a Write control pin is present. If it is driven low, write operations are enabled. I want to keep it in low state all the time. However in some applications I’ve seen a 10k ...
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I need to interface an EEPROM to my microcontroller using I2C interface. I also want to connect an RTC in the same bus. How should I calculate the required pull-up resistor values? As per the EEPROM ...
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I get error when i try to switch from sim1 to sim2 via "AT+SWITCHSIM=1" command @ SIM7672SA How can I fix this, or does the firmware not support dual SIM despite the hardware doing so?
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I have designed a circuit that we use in practice, and it works correctly in real life. we connect J2 to microcontroller to monitor the current in primary side. it is working so good in practice. I ...
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I'm using Proteus 9.1 I'm running into trouble simulating a ESP32. From what I know, it should be working. The python file ...
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I have a PCB with UPD8872 CCD sensor that I took from an old scanner. I managed to solder the pins of the board to Arduino compatible wires and programmed the Arduino and, also, wrote desktop app that ...
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I'm using PIC16F18346 controller for relay switching. When the load is not connected relay is switching properly, no toggling or any other problem. When the load is connected, after some press relay ...
Jaimin's user avatar
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I’m working with at32f403a. I’m trying to understand the flow of SPI communication. I’m using polling not interrupts in my implementation of an SPI_TransmitReceive ...
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I have this SOM module. I initially planned to boot the SOM module from a NAND Flash IC that uses a parallel interface (requiring address, clock, enable, and data signals). According to the datasheet, ...
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Summary: I am using an Arduino UNO. I am using a potentiometer connected from 5V Arduino supply to ground to provide a variable voltage on the pot wiper, which I input to an analog input on the UNO ...
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EDIT: Microchip responded that this is an error in the datasheet. We have received clarification from our technical experts regarding the 16-bit register access order in the ATtiny102/104. After a ...
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I’m working on my first prototype board and wanted to make sure there aren’t any major issues with my design before I move on to the layout stage. I believe I’ve got most things right, but I’m a bit ...
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I'm designing a digital boost converter and need help analyzing this Bode plot. Could you please help me determine the following parameters: Crossover Frequency Phase Margin Gain Margin My conclusions ...
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Please help me understand how all the dedicated +9V and +5V pins are connected. I can't explain it verbally, as this is the first time I've encountered hanging blocks and this type of connection ...
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How are the hanging blocks of this device connected, and what function do they perform?
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This diagram is from The Wearable Electronic Customizable Device for Monitoring Activity Indicators. Volume 6, Issue 5 . The system consists of a number of discrete off the shelf modules, which ...
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I'm looking at a tutorial ( https://www.teamxnl.com/how-to-flash-an-attiny-25-45-or-85-with-arduino/ ) and I'm confused about one of the pin connections illustrated. I've read that, for the 85, Pin1/...
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I'm new to designing PCBs and have wanted to make a tiny accelerometer/gyroscope circuit for ages now. I did some ChatGPT-ing and digging around on the internet to come up with my own PCB which I ...
Ollie Olzu's user avatar
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My problem is that I can't adjust the angle. When I adjust the angle, signal at output aurduino move but output at RL (fan motor) doesn't move as adjusted. I don't know how to fix it. green is output ...
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I have two identical PCBs that include the same MCU MC68705R3CP. Unfortunately, one of them has an output pin PB4 configured as Darlington drive output that has a high output regardless of the normal ...
Bavly's user avatar
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I am unsuccessfully trying to read the temperature diode on a PIC24FV32KA301 using the temperature sensing diode as described in section 8 of this document. The data sheet provides a temperature vs ...
John Birckhead's user avatar
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I am just routing my PCB. Just wanted to check how crucial the crystal design is for an off highway application? It is a 8MHz crystal for a S32K144 NXP MCU. The GND plane you can see if stitched ...
Matt's user avatar
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I am considering porting a commercial design to STM32H573. The datasheet and manual describe a PRODUCT_STATE "option byte" located in FLASH memory. This "option byte" is discussed ...
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I'm new in the STM32 world. I’m currently testing basic UART communication on an STM32 (STM32F302R8) with an HC-05 Bluetooth module, and I’m running into a strange issue with receiving data. I'm using ...
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May I know whether I am properly converting from mAs to mAh. If wrong please guide for the proper method. I am taking standby current to show my calculation. The chip is working on a 3.3 V supply and ...
Confused's user avatar
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I have a smart device with ESP32-S3 Wroom as MCU. The power supply is a non-isolated offline buck switching (MP175GS). In this circuit Phase line is feed directly to the circuit as Ground and Null ...
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Regarding this STM32 MCU family (in my case STM32F303K8T6), in the datasheet there is the following statement about UART peripherals: If I'm not wrong it says this MCU has three USARTs. But when I ...
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I am trying to communicate between 2 nRF24L01+ and am using 2 Raspberry Pi Pico's to control them. Below is my code, schematic, and the datasheet. My problem is that the transmitter always prints <...
Pixeled's user avatar
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I am working on a circuit that uses a PC817 (or LTV-847 for multiple channels) as an input stage for my microcontroller (via MCP23017). The installation is in an automobile, and the input comes from a ...
Lucas Marino Torres's user avatar
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I am using a RELAY Rated 5V/5A (HONGFA HF49FD, coil resistance 210 Ohm) to switch a 200 watt heater (230 VAC). A transistor driver circuit connected between microcontroller and the relay. Transistor ...
sanjay's user avatar
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I am trying to use my ESP32-S3-DevKitC-1 microcontroller to power RGB addressable LEDs via the ESP-IDF 5.5 Command Prompt, but I am not able to power on the LEDs. I have tested the microcontroller ...
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I will be using this radiation sensor in my project. The schematic is given below. May I know can I connect the output of this sensor to ADC of CC1352P. The working voltage of CC1352P is 3.3V. If ...
Confused's user avatar
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NEC D78F9177 (8-Bit Single-Chip Microcontroller) Can someone specify, does this MCU support reading the device? It's not clear, does this particular MCU have built-in functions to disable flash memory ...
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I’m working on a self-balancing robot using an MPU6050 with DMP for yaw/pitch/roll data. Right now, I read the yaw angle using: ...
Wahyu Dwi's user avatar
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I am not finding the clock frequency of the oscillator used on the NUCLEO-WB55RG board? What's the value? Where can I find it? How to select it as clock source for the MCU? Which one should be ...
Rovo's user avatar
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I’m working with a PHY device as described in the datasheet (p. 158) of this PHY, and I’m trying to understand the Tready timing with an EEPROM connected to the device. According to the datasheet, the ...
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I'm trying to setup a serial connection between my Atmega168 and my PC. I've tested out the connections and I think they're fine, since I'm getting some results on the terminal with each of my ...
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Premise: I am trying to build a GPS tracker using the Teseo-LIV3F GNSS module. Since this is my first time dealing with RF components, please let me know whether the layout and design are good enough ...
Manoj Srivatsa Devaraja's user avatar
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I’m monitoring large currents (~200A normal) using a current sense output (IMON) from a high-side driver. In a fault, the current can spike up to ~1000A almost instantly, possibly creating a voltage ...
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I want to implement some buttons in my controll scheme to controll the operatings of the system controlled by a NUCLEO-H723ZG uC. For the switches i will be using ones actually rated for 230 V AC, ...
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I am working on an STM32H743 project where I need to read ADC data synchronized with a center-aligned PWM signal generated by TIM8. My goal is to ensure ADC sampling is correctly aligned at the center ...
Joje Talaee's user avatar
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I'm currently working on a Arduino controller that sends data to an API. One of the values I need is the surface temperature of a carrot, preferably a large distance away, approx. 2..3 metres. EDIT: ...
FrancoisBee's user avatar
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I have a 1/8 NPT thermistor that will be installed into a oil filter sandwich plate to measure oil temperature. Here is a link to it -> https://www.ebay.com/itm/276877376822 It is a 10k type, but ...
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The PIC32CX datasheet initially claims that the 64- and 80-pin packages support Ethernet: Ethernet is not merely supported, but is also apparently perfect: the PIC32X errata sheet is 30 pages long ...
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I am new to microcontroller programming and I am confused about bare-metal vs vendor HAL (Hardware Abstraction Layer) . From what I understand: Bare-metal coding = accessing registers directly (GPIOx-&...
Shabbir Raghib4's user avatar
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I have a simple LED indicator tower with 2 colors, at 12 V DC. They are green and red. The brown wire is a buzzer. They all have a common ground: I was trying to wire it up to an Arduino (2 separate ...
Cheesus Toast's user avatar
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The Renesas R7FA6M4AD3CBQ#BC0 has "2 SPI channels". Is this 2 SPI channels in total, or per SPI port? At first I thought it would be 2 total, but then I saw that there were additional ...
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I’m building a USB IR blaster using a CH552T dev board, a Crowtail IR emitter, and an HS-S23B receiver connected to an ESP32. My goal is to send NEC protocol IR codes at 38 kHz using Timer2 for the ...
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I would first like to thank you all for your continued support of me as I continue to learn more about pcb design and electrical concepts. I can not express how truly thankful I am to have so many ...
Dominic Bleacher's user avatar
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I am designing a HSE circuit for a STM32F1 series and am using an 8 MHz crystal. I have been using the STM32 application note AN2867. The crystal selected is ECS-080-18-5PX-JES-TR. I have calculated ...
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