Questions tagged [microcontroller]

Question 1

I am trying to switch 9 V to a load with a logic level signal from a microcontroller. The microcontroller has a separate voltage source from the 9 V. I am not sure where I should put a flyback diode ...

Question 2

I am designing a circuit for an irrigation system with two pumps. Each of the two 12V-pumps is controlled in the same way by a 3V logic pin of a microcontroller through a relay. I'd like to add an ...

Question 3

I was re-reading the perennial Electronics.SE post Decoupling caps, PCB layout And in the very highly-voted answer it says: Now remember that a microcontroller is a broad band current source with ...

Question 4

Came here to seek guidance on whether to use ATmega chips or STM32F103 for a Vehicle Control Unit. The computer would be mainly dispatching CAN communication and receiving driver's requests, so ...

Question 5

I've recently gotten myself some PCBs for my first project. I've wanted to build a wireless mouse. I was debugging the nRF52840 (from ebyte https://www.ebyte.com/en/downpdf.aspx?id=445) with OpenOCD (...

Question 6

I want to thank the forum in advance for all the help provided. I am desperate to get this problem figured out. A little background as to why I am trying to do this…..I have an electronic muscle ...

Question 7

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 ...

Question 8

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 ...

Question 9

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 ...

Question 10

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 ...

Question 11

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 ...

Question 12

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 ...

Question 13

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 ...

Question 14

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 ...

Question 15

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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Questions tagged [microcontroller]

Is this a reasonable way to use a logic level signal to switch a load with a larger power supply?

Logic converter with floating Emitter

How is a microcontroller a current source?

VCU for an EV, student project, choice of microcontroller [closed]

Finding a short in a PCB project (nrf52840)

Easiest and most efficient way to alter the pulse width on a muscle stimulator [closed]

Write Protect Pull-Down resistor EEPROM

EEPROM interfacing with I2C [duplicate]

Discrepancy Between LTSpice Simulation and Real Measurements

Error Simulating ESP32 in Proteus

How to properly read values from CCD linear sensor?

Relay switching problem when load is connected

Does the RDBF flag gets set automatically after transmitting a byte?

Drop of voltage VCC on Arduino UNO

Accessing 16-bit Registers: Is this an error in the ATTiny102 datasheet?

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