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Interfacing STM32F429 with HD4478 LCD that has PCF8574T IO Expander Backpack using I2C

Started by Elliott_Embedded 2 years ago11 replieslatest reply 2 years ago180 views
Hi everyone, having a bit of an issue that is making me want to pull my hair out. I am trying to write from an STM32F429ZI to an LCD that has the PCF8574T IO Expander...

Interface mems microphone to microcontroller

Started by Codeguru 3 years ago8 replieslatest reply 3 years ago202 views
Hello,I am trying to connect a differential mems microphone’s positive output to a microcontroller.The positive output of the mic has a nominal voltage of 0.8V....

Using noise to increase resolution of ADC

Started by MaxMaxfield 3 years ago21 replieslatest reply 3 years ago810 views
Hi there -- can you explain in simple terms how – if you are feeding an analog signal into say a 4-bit analog to digital converter (ADC) with 16 digital output...
I have a bit of a conundrum -- when playing with LEDs, should we first modify brightness and then apply gamma correction, or should we apply gamma correction first...

Donut Mathematics

Started by MaxMaxfield 3 years ago103 views
Your knee-jerk reaction may be that this is not embedded related -- but even embedded designers have to have a hobby -- and I'm currently working on a project that...

MSP430 MCU Current Draw in LPM Mode

Started by mt1985 3 years ago118 views
Hi there.I have a custom board that designed by me with MSP430FR series MCU. The circuit is designed with low power consumption manners. When the firmware is not...

Wifi module prefered interface

Started by JackTravis 3 years ago5 replieslatest reply 3 years ago113 views
Hi, Wondering if someone could detail the pro and cons of using a programmable Wifi module VS a AT command controlled one. I never was a big fan of AT commands...

analog linear amplifyer connected to a plasma transmission device

Started by gillhern321 3 years ago6 replieslatest reply 3 years ago71 views
Plasma devices are NOT my forte but being asked to help out another engineer, i couldn't refuse. so here I am (sigh).Testing analog linear amplifier to a plasma...

Sending Data From TI TM4C123GH6PM to an HD4478 LCD with a PCF8574T I2C Backpack

Started by Elliott_Embedded 3 years ago6 replieslatest reply 3 years ago308 views
Hello everyone, I am trying to write a program that will enable me to send data from my TI microcontroller to the very common HD4478 LCD. Rather than utilizing a...

Audio Signal Filter

Started by RogerG 3 years ago15 replieslatest reply 3 years ago492 views
I am after some help.A few years ago I built an analogue signal audio filter to provide high frequency, mid range and low frequency for my audio amp. This works...

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