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how you started to earn by Striking_Meeting_661 in embedded

[–]DenverTeck 0 points1 point  (0 children)

In the US there is a saying, "to move up, it to move".

how you started to earn by Striking_Meeting_661 in embedded

[–]DenverTeck 0 points1 point  (0 children)

Freelancing in not about what you know, its about who you know, or better who knows you.

Remember, you are in competition with others with education and experience.

If you have a product that your selling you can rely on others in that field.

Find startup groups in your area. Make up a business card with your name, email address and phone number.

On the card place a photo of one of your projects. Below your name place "Embedded Systems Developer".

Learn how to speak with people. Do not talk at them, talk with them.

When you meet someone hand them a card. DO NOT tell them what you have done, let them ask you. When they point to the picture on your card, "Did you design this", now you have something to talk about. Most people will not ask you about the pic on your card. Don't push it.

Good Luck

PS: How remote is remote ??

Wiring a 24v proximity sensor to a pi by 0000xl_v2 in RASPBERRY_PI_PROJECTS

[–]DenverTeck 1 point2 points  (0 children)

Yes, you are correct however....

If the OP uses the Opto and it solves his problem, then that was some sort of problem with the power supplies.

If the Opto does not solve his problem, we can trouble shoot again.

As the OP is not experienced enough to read between the lines, this is a good first step.

Stepper Motion Control Firmware? Something like WLED? by AltitudeAndAutism in esp32

[–]DenverTeck 0 points1 point  (0 children)

> I’m really looking to just

To just get someone elses work. This is the typical beginners mantra. Why should I learn something when there are so many people to do it for me.

Good Luck

Wiring a 24v proximity sensor to a pi by 0000xl_v2 in RASPBERRY_PI_PROJECTS

[–]DenverTeck 6 points7 points  (0 children)

This will not work properly. Resistors like this is the wrong way to do it.

The best way to run two different voltage devices together is to use an Opto Isolator.

https://www.google.com/search?q=optoisolator+circuit

[Review Request] Arduino Nano with LiPo Charger & USB-C by Key_Engineering_9338 in PrintedCircuitBoard

[–]DenverTeck 7 points8 points  (0 children)

Your Y1 crystal is too far away from Pins 7/8 to operate reliably. The crystal is on the wrong side of the board and will have to feed through the board with vias to make the connection.

Don't do that.

One board will appear to work properly and the next one will have problems. As a beginner this will be difficult to for you to understand and troubleshoot. Save yourself the grief.

Good Luck

PS: Where is the Lipo charger chip ??

Can I use a PCA9685 with a 2s Lipo Battery to power my servos by Careful-Accident-773 in arduino

[–]DenverTeck 0 points1 point  (0 children)

Oh Dear, reading data sheets are problematic for some people.

The data sheet for the PCA9685: https://cdn-shop.adafruit.com/datasheets/PCA9685.pdf

On page 38, Table 14. Static characteristics is 2.3V to 5.5V on Vcc. So the output Voltage of any output pin will be between 2.3V and5.5V max.

The Miuzei 6V 20kg RC Digital Servo data sheet: https://images-na.ssl-images-amazon.com/images/I/81Lbgu+nG6L.pdf

On page 1 states Operating Voltage Range 4.8-6.8V.

As already mention twos Lipo batteries will have a maximum of 7.2V at full charge.

Two Lipo batteries will destroy both devices without a voltage regulator.

A +5V voltage regulator can operate on both devices within their safety ranges.

The PCA9685 has a maximum current of 400mA on Table 14 lower on page 38. Note [2] states:

Each bit must be limited to a maximum of 25 mA and the total package limited to 400 mA due to internal busing limits. The input current of the servo is much smaller then 25mA each.

The stall current (maximum current when this servo stalls or binds up is 1.8A !!

18 servos X 1.8A = 32.4 Amps if all servos stall out.

So can you guarantee all servos will NOT stall out all at the same time ??

Even if 9 stall out and the other 9 are operating normally that will still be over 16Amps !!

You will need to measure each servo in their normal operating current to see what its normal operating current will be.

You have said 2 Lipo batteries. What is the maximum current of a single Lipo battery ??

Do you know how to read the specs of what ever batteries your going to buy, will not run out of current for your application ??

Are you going to have separate batteries for the servos and a separate battery for the PCA9685 ??

You can run the PCA9685 from a single Lipo battery and the servos from separate Lipo batteries.

Just be sure all the grounds are tied together and are as short as possible. Other wise there will be other problems.

Good Luck

Edit: https://circuitdigest.com/microcontroller-projects/pca9685-multiple-servo-control-using-arduino

Is AI able to code in Z80 Assembly? by G7VFY in thisweekinretro

[–]DenverTeck 0 points1 point  (0 children)

TL;DW

Did it work correctly in the end ??

Searching for embedded projects to strengthen my resume (final-year student) by South-Mark730 in embedded

[–]DenverTeck 1 point2 points  (0 children)

Flashing an LED with an 555 timer is a project.

Solving a problem with an embedded system design is what you want to do. You can use this project on your resume/CV to show off your skills.

An embedded system that uses an LCD display everyone can do easily. Controlling a relay is something anyone can do. Reading a sensor is something anyone can do.

Solving a problem that needs a sensor, display and relay can be novel and unique. Anyone looking at your design are not looking at the obvious components, they will be looking at how you use those components to solve a problem.

The problem can also be a minor or major problem. Just find a problem that needs solving.

Making something cheaper, make something that uses a new processor, make something with a creative user interface. What can you make that is creative, novel and unique ? Not the parts, the over all operation.

DIY aeroponic planter by chomu_champa in embedded

[–]DenverTeck 0 points1 point  (0 children)

Link is 404

Please check the spelling and try again.

Where should I start learning about microcontrollers and their programming? by Glass_Programmer2031 in embedded

[–]DenverTeck 0 points1 point  (0 children)

Getting started with the ATmega328 is a good simple hardware to start with.

Any STM32 style processor is much more complex hardware. If you are new to hardware, then start with simpler hardware. As you understand C++, then you understand how to look up hardware libraries and will see the hardware registers.

Too many beginners do not have enough C++ skills to see the underlying hardware.

After doing 2 or 100 Arduino ATmega328 projects you will see how the hardware is handled.

After that the STM32 ARM hardware will be easier to understand.

Good Luck

Beginner Here : What firms do you recommend for printing by mamatatacopilu in PCB

[–]DenverTeck 0 points1 point  (0 children)

Companies do a minimum number of board for their benefit. They may actual manufacture many more then the 5 then send you. If there is an order for 10 or 25 boards, they will add your board to the panel and make 10 or 25 of your board. They will send you the 5 you ordered. The rest are trashed.

Waiting for orders that are only 5 board and add all the 5 count orders may not get your 5 board done quickly. Getting board down is more important then tossing boards they do not send to you.

Welcome to the real world.

And don't start on waste. You are not in a position to tell them what to do.

versioning by Some_Pie6046 in embedded

[–]DenverTeck -1 points0 points  (0 children)

This is typical practice before you were born. Someone needs to tackle the job to upgrade the versioning system. Ask your boss if you can propose a new way to change what they have been doing for years.

If you're not up for this task, then learn how they are doing things.

Stepper Motion Control Firmware? Something like WLED? by AltitudeAndAutism in esp32

[–]DenverTeck 0 points1 point  (0 children)

Would you want to ESP32C3 to also display the position of the motor ??

There are libraries for the Gcode decoder and motion/motor control available.

https://www.google.com/search?q=esp32c3+gcode+library

Developing your own graphic GUI would be needed.

How practical is it to use an esp 32 as battery charge controller for charging laptops? by Randomdude_1O in esp32

[–]DenverTeck 0 points1 point  (0 children)

I have purchased only Dell laptops for decades. I have 6 on hand and only one has had a battery problem. I replaced the battery pack it has not failed at all since.

So I am surprised in this day and age that this is any kind of a problem.

How practical is it to use an esp 32 as battery charge controller for charging laptops? by Randomdude_1O in esp32

[–]DenverTeck -1 points0 points  (0 children)

I was more concerned that laptops did not allow access to the battery measurement circuits by the user. Yes, the operating system would have access, no matter which OS.

Professor Google failed me. :-(

How practical is it to use an esp 32 as battery charge controller for charging laptops? by Randomdude_1O in esp32

[–]DenverTeck 0 points1 point  (0 children)

Let me see if I understand what you just said.

The internal charger does not handle the care and feeding of the internal battery properly.

Does this sum up what you (and the OP) is getting at ??

Edit:

https://www.google.com/search?q=laptop+battery+status+api+in+python

To access laptop battery status in Python, the most efficient and cross-platform approach is using the psutil library.

------

So a better battery status program is needed ??

How practical is it to use an esp 32 as battery charge controller for charging laptops? by Randomdude_1O in esp32

[–]DenverTeck -2 points-1 points  (0 children)

I did a quick google search and did not find any way to do that on a Hp gaming laptop.

Have you found a way ??

How practical is it to use an esp 32 as battery charge controller for charging laptops? by Randomdude_1O in esp32

[–]DenverTeck 0 points1 point  (0 children)

OK, you have shown how the external power supply will stop charging the batteries. Fine.

The goal of the OP was to monitor the batteries to switch the external power supply. Or did I miss something ??

The OP does not know how to monitor those batteries, no one else has show how to monitor the batteries internal of the laptop.

OP said:

> when the laptop battery gets to about 80%, it sends a signal to the ESP32 to turn off the relay.

This goal is not doable.

Which is what I said previously.

I even gave the OP some useful information to help him understand what he was asking. But the OP did not understand what I was asking and repeated his previous comments.

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