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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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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...

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 🙂...

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
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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:...

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?...
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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...

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?

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?...

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?

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

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...

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....
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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...
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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....

I am looking for a sensor that measures distance.

Morning guys. I am looking for a sensor that measures distance. I have two requirements: the sensor must be waterproof, so the HC-SR04 is not suitable, and I need to be able to use at least 4 sensors either with I2C or on a digital port.🧐 Thank you in advance....
Solution:
The VL53L1X is a great waterproof distance sensor for up to 4m range with I2C interface, but one disadvantage is its relatively high cost compared to some ultrasonic sensors

Can I connect 4 6v DC motors to an Arduino with a breadboard and MOSFET Transistors?

Hi Devs, I need to connect 4 6v DC motors to an Arduino for a school project. Can I connect 4 6v DC motors to an Arduino with a breadboard and MOSFET Transistors? I connected them with a quad motor driving shield before, but I accidentally destroyed it, so I'm searching for another solution.
Solution:
You can also get a motor module and interface with it. It will prevent your device from getting damaged. @aymen ammari https://lastminuteengineers.com/l298n-dc-stepper-driver-arduino-tutorial/...

Troubleshooting Erratic Behavior in Solar Electricity Router for Excess PV Power Management

Hello, I need help. I'm trying to make a router for solar electricity. The goal is to direct the excess electricity produced by the PV panels to a household resistive load rather than sending it to the grid for free. Reading the teleinfo port of the Linky meter works very well. When I use the dimmer library in one of the example sketches, my incandescent bulb works perfectly. But, in my router sketch, the bulb behaves erratically. I've been working on this for a month. If you could help me, thank you....
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I'm considering using an accelerometer sensor to read acceleration data

I'm working on an embedded Linux project and debating between I2C and SPI for sensor communication. I understand I2C offers error detection and framing with start/stop bits, while SPI seems simpler. For my specific use case, I'm considering using an accelerometer sensor to read acceleration data (e.g., motion detection, tilt). In this scenario, would SPI be a good choice despite its lack of built-in error detection? Please, someone should help me out 🙏...
Solution:
Although SPI does not have built-in error detection, you can implement error detection and correction in your user-space application using techniques such as checksums or cyclic redundancy checks (CRCs)

Reviewing My ATtiny85 MIDI Controller with CR2032 Battery: Schematic and Assembly Feedback Needed

Working on a tiny MIDI controller setup using an ATtiny85 chip using a CR2032 coin-cell battery. I think everything is good here on my schematic, but would be open to other opinions before I officially order it. Going to make it in three snap-off pieces, tied together with four screws, so I'm a bit nervous about that since I don't think KiCad will really check it correctly. Also, my analog input voltage divider circuit w/ four buttons on two inputs is largely untested, though I think it should work. Haven't really examined the resistor values closely, but I believe it should be able to detect when two buttons are pressed per a middle resistance value. Anyway, I'd welcome any thoughts, thx!...
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Human following robot with raspberry pi 4 and H BRIDGE L293D and 2 ultrasound sensors HC-SR05

Hi Devs, I'm building this human following robot with raspberry pi 4 and H BRIDGE L293D and 2 ultrasound sensors HC-SR05 so my colleague asked me put 10k resistor between trig and echo pins for each sensor My question is.. Why did we implement this resistor, is it for 5v tolerance for raspberry pins or data filtration?? #pcb-and-analog #hardware-design-chat...
Solution:
Hey putting 10k resistor is not that very necessary here. Raspberry pi gpio operates at 3.3v DC and the Ultrasonic sensor outputs 5v at the ECHO pin that's connected to the Pi. What you need to do is to create a voltage divider circuit here at the ECHO pin so that it will be btw 3v to 3.3v which the Pi can handle. If not there might be damage caused on the gpio of the Pi board. This also will help you. https://thepihut.com/blogs/raspberry-pi-tutorials/hc-sr04-ultrasonic-range-sensor-on-the-raspberry-pi...
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