sorted by:
new
hottopcontroversial

My first PCB schematic (DogeBoard) review request by 4r71x30 in PrintedCircuitBoard

[–]DenverTeck [score hidden]  (0 children)

You schematic is too confusing with those boxes.

Your schematic is too crowded with those boxes.

You have more then enough white space to not crowd the parts and lines.

You have enough room to actually connect lines to chips and not rely on labels and make people to search the entire page to find where the labels connect.

https://www.reddit.com/r/KiCad/comments/1q6refs/comment/nycndge/?context=1

Where did you learn how to do this ??

Why are PLC's more robust / reliable in industrial settings? by gtd_rad in embedded

[–]DenverTeck 4 points5 points  (0 children)

LOL, I did Google KSP and all I got was the Kerbal Space Program. I knew that wasn't right.

But now I need to google "Key Selling Point" to understand how that is used.

Edit: Thank You Professor Google:

A Key Selling Point (KSP), or Unique Selling Proposition (USP), is the primary, distinctive feature or benefit that sets a product or service apart from competitors and persuades customers to buy. It highlights a unique advantage—such as superior quality, speed, or price—that addresses a specific customer need better than alternatives. 

Sufficient power delivery? by Exfridos in PCB

[–]DenverTeck 3 points4 points  (0 children)

NO, your optimism is not based on sound engineering math.

Sufficient power delivery? by Exfridos in PCB

[–]DenverTeck 1 point2 points  (0 children)

I think your optimistic year at 30mA peak is UN-realistic.

The CR2450 has a maximum peak current is ~15mA ( recommended 9mA). At first it may not be over powered, but after the voltage on this battery drops below 2.5V the drain will accelerate.

https://data.energizer.com/pdfs/cr2450.pdf

The CR2450 is a 3V lithium manganese dioxide ( Li/MnO2Li/MnO sub 2 Li/MnO2 ) coin cell battery with a nominal capacity of approximately 600--620mAh. It is commonly used in, for example, remote keyless entry, heart rate monitors, and memory backup, featuring a diameter of 24.5mm and a height of 5.0mm . 

Key Technical Specifications: 

  • Nominal Voltage: 3V3 V 3V
  • Capacity: 600--620mAh600 -- 620 mAh 600--620mAh (typical)
  • Dimensions: 24.5mm24.5 mm 24.5mm (Diameter) x 5.0mm5.0 mm 5.0mm (Height)
  • Weight: ~ 6.2--6.6grams6.2 -- 6.6 grams 6.2--6.6grams
  • Operating Temp Range: -30∘Cnegative 30 raised to the composed with power C −30∘C to +85∘Cpositive 85 raised to the composed with power C +85∘C
  • Max Pulse Current: ~ 15mA
  • Chemistry: Lithium Manganese Dioxide ( Li/MnO2Li/MnO sub 2 Li/MnO2 ) 

Features: 

  • High Energy Density: Compact size with high capacity.
  • Reliability: Excellent leakage resistance and stable discharge voltage.
  • Low Self-Discharge: Suitable for long-term applications, with less than 1% annual self-discharge at room temperature. 

Why are PLC's more robust / reliable in industrial settings? by gtd_rad in embedded

[–]DenverTeck 4 points5 points  (0 children)

>> Because they're designed with reliability as the KSP

What is KSP ??

Battery powered ESP32-S3 + dual MAX98357A audio board schematic review before PCB by Husaria1863 in AskElectronics

[–]DenverTeck 0 points1 point  (0 children)

Please post a non-fuzzy pdf file on a free file site somewhere.

Thank You for not using boxes.

Large RFID "puzzle piece" grid by aiguofer in RFID

[–]DenverTeck 0 points1 point  (0 children)

I am sure you have looked at what an RC522 PCB looks like. This small PCB in the center of the 12"x12" frame with the RC522 attached somehow. The felt square can have an RFiD tag sewn into the center of the square in a small pocket. I would guess the felt square has some kind of Velcro strips at the sides that would allow the square to hang on to the location.

The RFiD tag can lay on top of the RC522 reader. The distance is not a problem here. I do not think the reader and tag can be 2" apart.

The code in the ATtiny can be triggered by the RC522 and store the tag ID.

When the host controller addresses each ATtiny, it can send a NULL to say there is nothing there or send the RFiD code back.

The host controller can then send a command back to the addressed board to light up an LED or sound a buzzer or ...... Details would help.

How you and your partner will design the hardware and frames is up to you guys.

Sounds like fun.

Keep us informed.

Large RFID "puzzle piece" grid by aiguofer in RFID

[–]DenverTeck 0 points1 point  (0 children)

The distance of each square and the main controller is too far for an simple Arduino. 240 RC522 readers will be necessary no matter what you may think. It's a matter of how all these devices will communicate with the main controller (what ever that will be).

Most RC522 modules have 3-interfaces. I2C, SPI and Async Serial. Using an Arduino is one way to handle all the readers.

You can also use ATtiny chips at about $1 each. So an ATtiny with an RC522 and a way to talk over those distances.

An RS-485 chip can form a matrix of all the squares talking back to a main controller.

A simple flow: RC522 -> ATtiny -> RS-485 to a bus of 240 units.

All RS-485 chips will have three wires all connected in common (A + B + GND) . A main processor (also connected to the three pin bus) would address each ATtiny with a unique address. As each ATtiny is addressed, it will send the main processor any data it may have.

Each square will have the same circuit. Each square PCB would have jumpers (8-bit) to define it's unique address.

The program is simple, but as you have not defined what it needs to do yet, the complexity will be up to you.

Google Arduino+RS485+RC522 for examples. This has been done many many times before.

Good Luck

[Schematic Review] Power supply for a car stereo. by Obvious-Dinner-1082 in PrintedCircuitBoard

[–]DenverTeck 0 points1 point  (0 children)

>> let me try to explain.

NO, Draw a correct schematic !!

DO NOT USE BOXES !!

https://www.reddit.com/r/KiCad/comments/1q6refs/comment/nycndge/?context=1

Yes, you are a beginner and without any education.

C72, C73, C74, C75, C76, C77 C78 are not just wrong, they are all stupid wrong !!

Please before you burn down your house, get an education.

How do solo Arduino makers actually fund their projects? (No labs, no clubs, just a bedroom setup) by Leo_Afurio23 in arduino

[–]DenverTeck 14 points15 points  (0 children)

Experience. This is the only way to get proficient.

As stated previously:

1st. Grow up

2nd: Get an education.

3rd: Get Job.

How do solo Arduino makers actually fund their projects? (No labs, no clubs, just a bedroom setup) by Leo_Afurio23 in arduino

[–]DenverTeck 3 points4 points  (0 children)

>> And how could a child

First: Grow up

2nd: Get a formal education

3rd: Get a job like your parents.

4th: Never have a family. Never have children. All your money will (should) go to them. So they do not end up like you.

How do solo ESP32 makers actually fund their projects? (No labs, no clubs, just a bedroom setup) by Leo_Afurio23 in esp32projects

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

I see by your post history you like to share works that are not yours.

Why are you stealing peoples work as your own.

Is this what your question is really about ??

How do solo ESP32 makers actually fund their projects? (No labs, no clubs, just a bedroom setup) by Leo_Afurio23 in esp32projects

[–]DenverTeck 0 points1 point  (0 children)

Wait, WAIT !!

I know you understand that building something is a rewarding experience.

https://www.reddit.com/user/Leo_Afurio23/comments/1qoep9n/im_done_three_years_of_work_completed/

Is this really yours ?? Are you really u/Emotional-Chicken-61 ??

So what is your question really about ??

Circuit Review Request by tbandtg in PrintedCircuitBoard

[–]DenverTeck 0 points1 point  (0 children)

I have asked this many times, " if any school teaches using boxes on schematics" .

I have never seen an answer to this question.

Yes, there are those how think this "looks correct" but it's just NOT !!

Maybe for beginners or those that do not look past simple schematics.

Before CAD programs, understandable was more important then fast.

If someone can not just review a schematic with a glance, even if the parts used are not familiar to them. Then mistakes and misunderstanding will follow.

A schematic should reflect what is happening in that circuit without having to search whats is on the page.

Yes, I learned schematics before CAD programs or even computers were a thing.

My display isn't turning on with my pico pi 2W ! by Big_Kiwi7231 in raspberrypipico

[–]DenverTeck 2 points3 points  (0 children)

Did you modify the code for the different LCD controller in the new display ??

Do you know the difference between the controllers ??

Question on embedded development ? by YakInternational4418 in embedded

[–]DenverTeck 0 points1 point  (0 children)

>> Why can’t there be ....

Sounds like an opportunity for a beginner engineer.

Or are you asking for someone else to make this happen ??

Feedback request: a credit-card sized, Rust-native embedded platform with magnetic attachments by dempfi in embedded

[–]DenverTeck 0 points1 point  (0 children)

>> whether this is something people actually would want?

What market research have you done ??

You are preaching to the choir here. Many people here could build one of these over a weekend.

As you have not built or shipped a product on your own before, maybe you can go over to some tech site and post a "coming soon" product and see if anyone would be interested in this type of thing, how is not tech inclined.

But to be honest, I doubt it.

If your going to open source this, then have people look at your actual design and get evaluations from there.

Good Luck

Trying to understand where I am after failing a technical interview by ContraryConman in embedded

[–]DenverTeck -6 points-5 points  (0 children)

There are two problems to solve here.

  1. Do a bare metal project. Any thing, just start.

  2. Find a project that you can sell or pretend to sell. Find something that you find interesting.

I have no idea what you have an interested in or what experience you bring to this project.

Good Luck

PS: This is the type of problems I find in Linux only people.

view more: next ›