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DevHeads IoT Integration Server

The DevHeads IoT Integration Server accelerates technology engineering by helping pro devs learn, share and collaborate.

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geek_nomad

7/29/2024

Is there any founder/maker working on a hardware design which requires high density pcb design ?

Daniel kalu

7/24/2024

Optimizing Power Consumption and Ensuring MQTT Reliability with ESP32 and FreeRTOS

In an effort to optimize power consumption in an ESP32-based loT project using FreeRTOS and MQTT, I face challenges with high power usage and unreliable MQTT reconnections after deep sleep. Despite using deep sleep modes and optimizing task scheduling, power consumption remains at 10mA, above my target of 5mA. The ESP32 stays in deep sleep for 10 minutes before waking up. Upon waking, MQTT reconnections fail intermittently with errors such as MQTT: Connection Timeout, Failed to Re-establish Network Connection, and Server Response Delayed, causing missed data transmissions and requiring multiple retries....

Dtynin

7/24/2024

Failed to Read RTC Data with ATmega2560 and Zephyr OS: Integration Issue

Hey guys, so I've been trying to integrate an RTC module with an ATmega2560 and Zephyr OS for time-stamped data logging, and resolve the issue of failing to read from the RTC? I have tried connecting the RTC module via I2C and implementing RTC read and write operations, despite that, I've been encountering the error "Failed to read from RTC." Here's the code: ```c #include <zephyr.h> #include <device.h>...

Solution:

You may need to enable the RTC clock, look at register 0x00 bit 7 should be a CH value.

UC GEE

7/24/2024

Are There High-Capacity DRAM Modules for FPGAs That Don’t Use CXL Protocols?

Hi Devs, I'm working on a project requiring a large amount of DRAM (similar to SSD capacity) for a single, high-end FPGA. Ideally, I need constant read/write access (24x7) at around 10GB/s bandwidth (split between 5GB/s reads and 5GB/s writes). While RAID isn't a major concern, the sheer volume of data makes standard DDR4 impractical due to limited capacity per module and high pin count requirements. CXL modules seem like a good fit for capacity, but my FPGA doesn't support CXL. ...

Solution:

You can workaround with HBM cus it has stacked DRAM layers on top of the FPGA, impressive bandwidth and capacity It might not be as spacious as CXL yeah, but it could get you closer to your target Or use multiple DDR4 modules...

accur4te

7/23/2024

Troubleshooting Lagging Issue in Flow Meters

hey guys i currently received a flow meter from its manufacture , there is a fault in that meter as per them . It lags out frequently , like the screen (lcd) freezes after some time . They have sold 1000+ meters conttining same hardware , What can be the possible factor that may cause lagging ?

Camila_99$$

7/23/2024

Strange Resistance Reading in Autonomous Tracked Robot Circuit

Hello guys, Recently, I have been building a tracked robot that moves autonomously (avoiding obstacles, etc.). I bought new components that I soldered onto my prototyping board. Before coding, I wanted to test everything first (connections, short circuits, bad solder joints, etc.). So, I checked with my ohmmeter if there was a short circuit between the positive and negative, and the multimeter showed 187 ohms! Strangely, I don't have any resistors of that value in my circuit. If you can help me understand where the problem comes from, I would be very grateful. Attached is a diagram of my circuit and the location where I placed the ohmmeter (made on virtual graph paper)....

Gowtham J

7/18/2024

Recommendations for Robust Industrial-Grade Microphone IC with Noise Cancellation for BeagleBone

Hello Guys, I am working on Mic module which is used with beaglebone, The circuit gonna used in robust Industry environment. Recommend me good microphone (ICs) module circuit with noise cancelation...

Solution:

For a robust industrial environment, you'll need a microphone module that can withstand harsh conditions and provide reliable performance

Ramkumar

7/18/2024

Any one work on AC to DC converter, without transformer

Hi team, Any one work on AC to DC converter, without transformer, If yes can you share me the components selection and calculation guidance. Thanks in advance 🙂...

Solution:

https://ww1.microchip.com/downloads/en/appnotes/00954A.pdf take a look at this appnote. As @ShreeshaN says, these are non-isolated designs and suitable for low current applications only.

accur4te

7/18/2024

Seeking Feedback on My First ATmega32 Development Board Schematic

i designed this basic atmega32 16 au dev board can anyone , if its fundamentally correct ? its my first schematic that i have build from scratch

Solution:

Looks alright, although please go through the points in the link to make it more better. https://electronics.stackexchange.com/questions/28251/rules-and-guidelines-for-drawing-good-schematics

Camila_99$$

7/18/2024

Designing a PCB for Managing 6 Pilot Wires with STM32 and MOC3043

Morning guys, I want to create a manager for 6 pilot wires using MOC3043 for the 220V part, an STM32 Blue Pill, an OLED screen, a few buttons, and an SD card reader for control. The sketch is functional, and the breadboard prototype confirms it works. Making a printed circuit board for this seems like a good idea, except that I have never made one before (apart from using copper boards, pads, and ferric chloride... yuck). My questions are:...

Solution:

1. You can used KiCAD for the design. 2. You can try pcbway.com or jlcpcb.com both will give you the estimate cost for the size. Other than that, make sure you follow adequate trace space and width for the AC traces. If you put them too close they might arc and start a fire....

aymen ammari

7/9/2024

Do you guys have any idea where I can find this type of transformer?

I have a AC function generator that outputs a maximum of 20 volts. I need to connect this generator to a Step Down Transformer, keeping the sine wave on the output, for a small educational project I'm working on. The problem is that I can't find a transformer with low input voltage anywhere. I've being looking for days already and the only transformers I found are above 117V on the primary.I and Do you guys have any idea where I can find this type of transformer?...

Solution:

Look for small audio transformers or repurpose transformers from old electronics with low input voltage. Check suppliers like Digi-Key or Mouser

Joseph Ogbonna

7/7/2024

Can analog circuit design adapt and remain relevant, or will it become a relic of the past?

As digital technologies continue to advance and dominate various aspects of modern life, can analog circuit design adapt and remain relevant, or will it become a relic of the past, and what innovations and breakthroughs can we expect to see in analog circuit design that will ensure its continued importance in a rapidly digitizing world? @IoT Cloud @PCB & Analog...

ezpz

7/4/2024

Does anyone know any camera manufacturer who can manufacturer custom camera boards?

Hey Guys, I am working on a bird house camera project. Does anyone know any camera manufacturer who can manufacturer custom camera boards?

Solution:

https://www.my-boardclub.com/boards/ar2020cssc13smtah3-gevb/#apply

JeremyCook

7/4/2024

How to Cut a Large PCB Stencil to Size Without Damaging It?

So I ordered a (fairly small) PCB stencil that I thought would come cut to size, but instread it is huge. Maybe I selected framework by accident. Anyway, I'm debating on how to use it as-is or cut it to size. It's kind of a strange thing to cut - maybe tin snips would work, but I keep thinking that would curve the edges over. Anyone run into something like this? Any good solutions or ideas that you think might work?...

Solution:

Hey there! Here are some quick options: Use it as-is if you've got the space. Just line up your PCB carefully. DIY cutting: Try a sharp utility knife with a straight edge, fine-toothed metal shears, or a rotary tool with a cutting wheel. Just watch those fingers! Frame it: Grab a stencil frame to make it more user-friendly. ...

Great~~~

7/1/2024

who has experience with integrated circuit analog mixed signal at nm scale CMOS?

is there anyone ic design expert who has experience with integrated circuit analog mixed signal at nm scale CMOS?

Camila_99$$

7/1/2024

A motion sensor or an ultrasonic sensor to correctly detect a hand at about 1.3 meters?

Hello everyone I would like to know what would be better to correctly detect a hand at about 1.3 meters? A motion sensor or an ultrasonic sensor?🧐 I have the HC-SR04 and the HC-SR501. It's for my laser harp. Best regards....

Solution:

I think HC-SR04 is the best Solution cuz its working rang is ip to 3m so it will work fine

Gendos

6/24/2024

Why is power consumption higher in standby mode than stop mode on an STM32F411CEU6?

Hey, anyone who might have a clue what's going on? Currently doing some energy-measurements on an STM32F411CEU6-based development board. When entering standby-mode the energy consumption during run-mode as well as sleep is higher than when using stop-mode. Why? ```cpp HAL_Delay(1000); __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);...

Solution:

@Gendos Use a debugger to verify the state of the MCU just before entering Standby, also Double-check the RTC configuration to ensure it is set up correctly and is the only wake-up source. This might ahv been the reason for higher every consumption...

aymen ammari

6/24/2024

Trying to establish SPI communication between two Arduinos

I'm trying to establish SPI communication between two Arduinos. When I directly wire pins 10, 11, 12, and 13 of both Arduinos, it works well and I can make them send and receive data. For a project I'm working on, my idea is to develop a quick connection between both Arduinos, something like a plug-and-play connection, so I thought it was a good idea to use a USB-C adapter to easily connect them. I chose USB-C because it is a cheaper solution in terms of adapters and cables. I imagine it is a bad idea since it's not working; there's no communication between the Arduinos....

Solution:

This is it https://circuitdigest.com/microcontroller-projects/arduino-spi-communication-tutorial...

wafa_ath

6/7/2024

can I use this sensor like a flex sensor to detect finger bending movement?

Guys, can I use this sensor like a flex sensor to detect finger bending movement?

Solution:

Hi wafa, I found this article that explains how does it work and how to collect it's signal https://www.800loadcel.com/load-cell-and-strain-gauge-basics.html Check it out you'll like it...

wafa_ath

6/7/2024

Why won't my PMSM motor rotate with FOC on STM32F031K6T6?

Hi everybody. I am working on a project using STM32F031K6T6 to control a PMSM motor using FOC sensorless. I tested the code generated from MCSDK running on STM32F407 and it works normally. but on STM32F031K6T6 the motor does not rotate. Anyone who has worked on this topic please help me. Thank you very much....

Solution:

Since it works on the STM32F407, it's likely a hardware or configuration issue. Try this out Clock speed: Ensure the clock speed is set correctly for the STM32F031K6T6....

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DevHeads IoT Integration Server

The DevHeads IoT Integration Server accelerates technology engineering by helping pro devs learn, share and collaborate.

DevHeads IoT Integration Server

The DevHeads IoT Integration Server accelerates technology engineering by helping pro devs learn, share and collaborate.