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Camila_99$$

5/16/2024

Is it profitable and especially possible to create a somewhat intelligent cat food dispenser?

morning everyone, I have a question for a project. 🤔🤔 🤔 In your opinion, is it profitable and especially feasible to create a somewhat intelligent cat food dispenser? Let me explain. I would like the dispenser to distribute a certain quantity at certain times (using a scale, for example), but with a kind of flap that closes the bowl if the cat doesn't finish (since I have multiple cats and I want to prevent them from stealing from each other), and that the flap only opens if it's the authorized cat (via their electronic identification chip, for example). Do you think this is possible???? Thanks in advance....

Okpara Elvis

5/16/2024

designing system with consumption of 960mA. Would a regulator with rating of 1A be sufficient?

"I'm designing a system with a current consumption of 960mA. The regulator IC I'm considering has a rating of 1A. Would this regulator be sufficient for my system, or should I opt for one with a higher rating? Your detailed opinions are welcomed @PCB & Analog...

Solution:

I recommend using a regulator of 1.2A or 1.5A of current this will be fine.

youcef_ali

5/16/2024

would like to record an analog signal of 70mghz frequency min, how do i proceed, the time is max 16

Hi team, i would like to record an analog signal of 70mghz frequency min, how do i proceed, the time is max 16 min of recording

Solution:

As per Nyquist criterion, your sampling frequency must be twice of measuring frequency, so your signal is 70 MHz, so fsample must be 140MHz, in this case you need ADC with 250Ms/s atleast, and depends on your measuring instrument memory you will have to transfer the measured data to larger memory multiple times in 16 mins as DSOs does not have large memory, this changes with resolution of ADC. Lower resolution lower data.

Camila_99$$

5/14/2024

Which software could I use to draw this on my computer?

Hi guys! I need some software assistance Plz , I would like to create a sort of template for drilling the front face of a casing. I have taken all the measurements. Which software could I use to draw this on my computer?🤔

Solution:

@Camila_99$$ LibreCAD, FreeCAD, even KiCAD will help you. Feel free to ask how and I will help you.

Ben

5/14/2024

What type of sensor can I use to check when the water gets dirty?

Hello everyone, last week I spoke about automating the water changing process in an artificial fish pond What type of sensor can I use to check when the water gets dirty( if there exists such sensor)...

Solution:

You can measure conductivity. You can measure light reflectability. You can measure color features.

Camila_99$$

5/13/2024

Could anyone identify these two components, please?

Hi everyone! Happy weekend! Could anyone identify these two components, please? They seem to be SOT23 vs SOT323. My friend Google couldn't help me 🙁 Thank you 🙂....

aymen ammari

5/13/2024

I want to make 48v battery charger, how I can make it (cercuit schematic)?

Hi everyone, I want to make 48v battery charger, how I can make it (cercuit schematic) and what's the calculation I must do

Solution:

I think they are 90% the same, but the 10% difference is important. In this 10% there are things like: sensing if battery is depleted and trying to 'jump start' with trickle current, knowing when battery is charged and stopping the cyle, keeping the charging current constant, etc. The battery charger is mostly a constant current power supply. The battery chemistry is also important when determining the charging cyle.

Okpara Elvis

5/9/2024

Which Cellular module do you recommend for Smart city project

Good day Everyone. I Am currently working on a Smart city project Which requires me to fetch Sensor data remotely Which Cellular module do you recommend for this project....

Solution:

I believe particle has a number of cellular modules you could check out: https://www.particle.io/ also Blues https://blues.com/ Particle even announced satellite comms earlier this year, and I think both work with other tech like LoRa and WiFi. A bit of disclaimer, I've worked with and/or am working with both of these companies, though I haven't used either of their cellular offerings yet. Particle seems especially well supported, so you might start with them, though I'd check out both....

aymen ammari

5/9/2024

What techniques can I employ to ensure thermal management and proper heat dissipation in my PCB layo

Hello everyone, I have a problem... despite implementing thermal vias and heat sinks, inadequate thermal management in the PCB layout caused components to exceed their temperature ratings, leading to premature failure and reliability issues. What techniques can I employ to ensure thermal management and proper heat dissipation in my PCB layout, particularly for components prone to overheating?

Solution:

Increase your trace spacing so it can accumulate enough current. You can also add copper pour on your PCB and create some polygons, these also helps in heat management. Add the right amount of vias also. ...

Daniel kalu

5/9/2024

I’m eager to venture into electronic hardware design.

Hey guys so i’m eager to venture into electronic hardware design. Could someone please give me the essential steps for me to learn electronic design It would be incredibly helpful if someone could provide a thorough roadmap to guide me through the process.

Solution:

@Daniel kalu this courses will be good for a start https://www.udemy.com/course/crash-course-electronics-and-pcb-design/?kw=Electronics&src=sac&couponCode=LEADERSALE24A...

Okpara Elvis

5/6/2024

Best Accelerometer Module for Speed and Tilt Measurement Project?

I am working on a project that will measure and calculate the speed of a moving object and tilt angle which accelerometer module will be suitable for this project @PCB & Analog @MCU, MPU & Firmware...

Solution:

I suppose it would depend to some extent on your accuracy requirements. The MPU6050 was mentioned, in its defense I suspect there are more examples etc for it than just about anything else, so that might be a vote for choosing it. Also, they're not too expensive (though not certain how they stack up to others. Depending on the situation, you might check out the XIAO nRF2840 board. Tiny and has an MCU built-in. I did a writeup on it here: https://embeddedcomputing.com/technology/open-source/development-kits/seeed-studio-xiao-nrf52840-sense-big-capabilities-in-a-small-package though haven't really used it since then....

wafa_athmani

5/6/2024

What is the difference between the two transistors referred to!!

Hello, What is the difference between the two transistors referred to!! What does the letter B and C mean??

Solution:

The B version has a DC current gain of 200, while the C version has a current gain of 420. Here there differences are listed. https://www.findchips.com/compare/bc547b--vs--bc547c...

Malek Lamraoui

5/6/2024

Help Getting Started with KiCad PCB Design

hello i am currently learning KiCad for pcb design and i would like to work on problems with other designers to acquire more knowledge and be more careful on the small mistakes that can happen

Joji

5/5/2024

I want to learn about hardware design. Where should I start?

I'm newbie to hardware

𝚑𝚎𝚛

5/2/2024

How to Build a Database for a Phobia Detector Using Heart Rate Sensors, Accelerometers, and VR Heads

Hello everyone i would like to ask you something. Me and my team are trying to build a phobia detector and these are the tools we using: - heart rate sensor - accelerometers (for trembling) - VR headset for simulations Yet we don't know how to build the database for it, something to record the reaction instantly. ...

wafa_athmani

5/2/2024

What is the difference between the two transistors referred to!!

Hello, What is the difference between the two transistors referred to!! What does the letter B and C mean??

wafa_athmani

5/2/2024

How to Optimize Control Pins for Basic Movement Functions in a Robot Using L298N Dual H-Bridge?

Hello.I have a simple robot with two DC motors. Using the L298N Dual H-Bridge, what's the minimum number of control pins I can use to give me forward, back and turn? If I tied Ven high and relied on the "C=D Fast Motor Stop" when idle would this be bad?...

Solution:

Hello. In my opinion, you need all 6 inputs. You could go with 5, when connecting both EN inputs. You need the fast motor stop option. This means that both C and D cannot be controlled only inversely, but you need the possibility to drive them at the same logical level.

aymen ammari

4/30/2024

Trying to build a robot with hoverboards brushless motor. any idea about their size, voltage...?

Hi everyone, I'm back 😊... So.... I'm trying to build a robot with hover board brushless motor, and I will buy an old hoverboard to get its brushless motors, any idea about their size, working voltage, power consumption any idea about what the robot can do.. I'm all ears

Chimmuanya Okere

4/29/2024

Between the linear and switching voltage regulator. Which is more efficient

Between the linear and switching voltage regulator. Which is more efficient. And in what application can we use both. If you can drop their major differences I'd appreciate. Thanks. @PCB & Analog

Camila_99$$

4/29/2024

Can the analog input port of the Arduino Uno support a negative voltage from -5Vdc to 0Vdc?

Hello everyone, a question intrigues me: can the analog input port of the Arduino Uno (atmega 328p) support a negative voltage from -5Vdc to 0Vdc? The issue: I have installed a TIdc (battery charge current sensor) which normally provides 0 to 5Vdc. But when the battery is not charging and is supplying power, the TI returns a negative voltage from 0 to -5Vdc. Current is in the tens of milliamps range. I have tried using various types of diodes to block this negative voltage, but all the diodes significantly affect the voltage delivered by the TI, resulting in a total loss of accuracy in reading the charge current....

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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.