Microcontroller Top Talks in August 2019 on EDABoard.com

Peer-to-peer, engineer-to-engineer questions and answers from the EDABoard.com engineering community around microcontrollers. Click the “Read more” link and follow the entire conversation and maybe add your two cents by logging in to EDAboard.com.

Sine PWM calculated with PIC – I have seen several posts about PWM in order to make a one phase inverter, and most use long values table calculated to get the sine wave. But what if it calculates the duty value each time?  I see I will have to compensate about 1/7 of cicle time due to the calculation time.  Read more

One audio master transmitter to multiple audio receivers – I am planning on a project where there is one audio to master transmitter to (about 8 receiver, where it receives stereo ) multiple audio receivers. How do I  lay out the project? I think Bluetooth is not enough. Read more

MOSFET gets hot in H bridge – I tried making an H bridge circuit using P Channel and N channel MOSFET and driving the MOSFETs using transistors. But the P-channel MOSFET gets extremely hot within a second. Can anybody please let me know where the problem is? Read more

Interfacing IR remote using NEC protocol – I am trying to interface IR remote control (NEC Protocol) using PIC16f887p microcontroller. The coding objective is to read the IR signal and has to display the equivalent HEX value of command and address. While testing in hardware, the IR signal is not detecting but got random output. Read more

How to stop micro burning when GND & VCC short circuit –  If I short circuit VCC and GND, the micro burns. I am using LM2596 3.3V. The LM2596 schematic is below. How can I protect the micro from this? Read more

STM32F3 built-in operation amplifier – I look into datasheet STM32F303 page 122 6.3.21 operational amplifier characteristics, and I’m a little confused. Why does ST not specify typical voltage offset of inputs? Why does ST not specify typical input current of inputs? Read more