Questions tagged [microcontroller]
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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How do I drive a 180 VDC, 250 W PMDC motor from 230 VAC and control its speed from a Jetson Nano? [closed]
I want to control a 250Watt 180VDC pmdc motor using jetson nano. I am a computer guy. Can someone help me, about what motor driver should I choose and also how can I connect the jetson nano to this ...
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STM32 F302R8 UART RX reception error
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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Chip current calculation mAs to mAh conversion
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 ...
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Is it possible to disable Read-Out protection of a microcontroller as a feature permanently?
For some reason I want the feature to be gone and was wondering whether it was possible or not? Couldn't find something on it. Most tutorials only guide for enabling the Read Out Protection and ...
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How connect MCU with non-isolated power supply to PC?
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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ID-12LA RFID Module is unresponsive
I recently bought a few of these modules (ID-12LA), thinking it would be easy to setup and utilize. I have not been able to get it to work. At first, I bought a pair from Sparkfun and after much ...
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Why does the USART count in STM32 MCU differ between datasheet and IDE?
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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nRF24L01+ Communication Issues
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 <...
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How to properly handle floating input on an optocoupler LED with long wires in automotive environment?
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 ...
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Relay Contact Sticking and Driver issue
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 ...
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Using a 2-terminal CCR (AL5809-20) to drive SCR gates
I’m building a single-phase, phase-controlled rectifier for a battery-charging. The power devices are 30 A-class SCRs (think TYN/BT152 class). I do zero-cross detection and compute a firing angle in a ...
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How to power RGB LED Strip with ESP32-S3 microcontroller on breadboard?
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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Radiation Sensor interface to ADC of CC1352P
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 ...
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Does D78F9177 MCU support reading the device?
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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PID yaw control issue with MPU6050 – orientation jumps at ±180°
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:
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