Had made this linkedin post on i2c multiplexing. https://www.linkedin.com/posts/adityathakekar_embe

Had made this linkedin post on i2c multiplexing.

https://www.linkedin.com/posts/adityathakekar_embeddedsystems-iot-esp32-activity-7143202129975959552-xX7o?utm_source=share&utm_medium=member_android

Aditya Thakekar on LinkedIn: #embeddedsystems #iot #esp32 #sensors ...

Mastering I2C Multiplexing on ESP32 with BMP280 Sensors

The Challenge:
Ever tried connecting multiple BMP280 barometric sensors to an ESP32 for a… | 14 comments on LinkedIn

AAditya thakekar Had made this linkedin post on i2c multiplexing. https://www.linkedin.com/posts...

nour_oud•1/18/24, 11:17 AM

Good information

Aditya thakekarOP•1/18/24, 11:20 AM

Thanks

DevHeads•1/18/24, 12:48 PM

Congrats @asper ! You've been Verified!

nour_oud•1/18/24, 12:59 PM

Welcome @asper ! Can you tell us a little about yourself and your technical background?

asper•1/18/24, 1:00 PM

Hi, I am asper, I work at a space tech startup as an embedded systems engineer. Have been passionate about hardware since i was a kid. I am an aeromodeller and love systems engineering.

nour_oud•1/18/24, 1:17 PM

That's great! @asper Can you share a bit about the projects you've undertaken in the past or any current projects you're working on?

DevHeads•1/18/24, 2:04 PM

Congrats @SD ! You've been Verified!

SD•1/18/24, 2:05 PM

Hii

Saßì•1/18/24, 2:07 PM

@SD Welcome! We're eager to know more about you. What's your professional background or current focus?

SD•1/18/24, 2:09 PM

"I am an IoT and IIoT developer

kristof-at-embeetle•1/18/24, 2:18 PM

Hi guys,
I'm using the following PTC fuse to protect the Tiny Scarab board (and the PC you're plugging it in):

kristof-at-embeetle•1/18/24, 2:18 PM

kristof-at-embeetle•1/18/24, 2:18 PM

The part number is

kristof-at-embeetle•1/18/24, 2:19 PM

It's a PTC resettable fuse that can hold 500 mA. As per the USB standard, that should be fine. The PC should be able to deliver 500 mA on each USB port without damaging itself.

kristof-at-embeetle•1/18/24, 2:19 PM

However, I'm a bit worried about two things:

kristof-at-embeetle•1/18/24, 2:21 PM

1) The will trip only at 1A. In other words, the trip current is twice as high as the hold current. Isn't that a bit dangerous for the PC?

2) The has a R_min of . That looks okay. However, the is . The datasheet says: R 1max = Maximum resistance of device at 20°C measured one hour after tripping or reflow soldering of 260°C for 20 sec. Could this be a problem?

kristof-at-embeetle•1/18/24, 2:22 PM

PS: please feel free to suggest another PTC fuse with better characteristics

DevHeads•1/18/24, 2:40 PM

Congrats @dch ! You've been Verified!

Saßì•1/18/24, 2:44 PM

@dch Welcome! We're eager to know more about you. What's your professional background or current focus?

Kkristof-at-embeetle Click to see attachment

nour_oud•1/18/24, 3:13 PM

I'm not a hardware expert, but based on the specifications you provided for the 0402L050SL, it appears to be suitable for protecting the Tiny Scarab board and the PC .

Aasper Hi, I am asper, I work at a space tech startup as an embedded systems engineer. ...

Navadeep•1/18/24, 3:18 PM

Very nice! Welcome to DevHeads

Aditya thakekarOP•1/18/24, 5:33 PM

Poly switches are not completely reliable devices. If you need it to trip in between 500-1A.

Else for generic purposes these are apt.

Kkristof-at-embeetle 1) The `0402L050SL` will trip only at 1A. In other words, the trip current is tw...

Aditya thakekarOP•1/18/24, 5:35 PM

Can you share the end application? @Petr Dvořák can add insightd

DevHeads•1/18/24, 6:22 PM

Congrats @viki4559 ! You've been Verified!

nour_oud•1/18/24, 8:28 PM

Welcome @viki4559 ! Can you tell us a little about yourself and your technical background?

DevHeads•1/18/24, 10:28 PM

Congrats @Explosssive ! You've been Verified!

fwen•1/19/24, 1:52 AM

Whattt I've never seen a dev board this cheap let alone the Bluetooth capability

fwen•1/19/24, 1:52 AM

For reference 1 USD is roughly 30 THB

techielew•1/19/24, 2:22 AM

What’s up @Explosssive? Can you share a bit about your tech background, what brings you to DevHeads, and what you’re currently working on?

Thanks for joining us and check out the #announcements channel for some details on how to get started

Original message was deleted

fwen•1/19/24, 3:17 AM

It's AliExpress....

fwen•1/19/24, 3:17 AM

Haha

DevHeads•1/19/24, 3:49 AM

Congrats @Sikandar ! You've been Verified!

Sikandar•1/19/24, 3:51 AM

SSikandar hi

Umesh Lokhande•1/19/24, 3:53 AM

Hi Sikandar, Welcome! will be happy to know your technical background and what project you're working on these days.

techielew•1/19/24, 4:00 AM

Hi @HW-Leads and @Hardware Integration @Helper friends. I'm messing around with oscilloscopes for really the first time and trying to figure out how to address jitter in an I2C signal.

Any process of elimination or best practice checklists to go through as I start trying to clean it up? Thanks in advance.

Ffwen Whattt I've never seen a dev board this cheap let alone the Bluetooth capability

techielew•1/19/24, 4:02 AM

Is that right? Is this a kickstarter? What site is this?

Aditya thakekarOP•1/19/24, 4:02 AM

Optimize
1.vertical resolution

Sampling rate
Bandwidth
Voltage threshold.
Select jitter - like rising or falling edge

Ttechielew Is that right? Is this a kickstarter? What site is this?

fwen•1/19/24, 4:03 AM

aliexpress.com

Ttechielew Hi @HW-Leads and @Hardware Integration @Helper friends. I'm messing around with...

Aditya thakekarOP•1/19/24, 4:04 AM

For any signal in general you can follow above steps.

GrimReaper0304•1/19/24, 4:08 AM

Hi guys, i am a final year undergrad student, Interested in embedded software, and the worst thing to happen to me recently was that i found out after a good 3 days of frustration, that one should be careful while choosing power supply for their project, a 100mV ripple can mess up internal circuitry of your sensors and you will keep wondering why sensor is generating nonstop garbage data.
Verdict - avoid cheap chinese stuff

GGrimReaper0304 Hi guys, i am a final year undergrad student, Interested in embedded software, a...

Navadeep•1/19/24, 4:09 AM

Thanks for sharing. Learnt something new today and probably will save some days.

NNavadeep Thanks for sharing. Learnt something new today and probably will save some days.

GrimReaper0304•1/19/24, 4:11 AM

Yes, but even if you can't avoid it, atleast have a good output filter circuit in place

Saßì•1/19/24, 4:15 AM

Friendly Reminder about Upcoming Event
https://discord.com/invite/McSvxeCg?event=1196809694661054556

fwen•1/19/24, 4:48 AM

ill see if i can make it

TarnishedMaidenLess•1/19/24, 5:00 AM

Hello everyone,

I need career advice, I am MCA graduate and I have interest in embedded firmware development.

Can someone guide me?

Aditya thakekarOP•1/19/24, 5:22 AM

Only if you have interest... Start working around with small projects

TTarnishedMaidenLess Hello everyone, I need career advice, I am MCA graduate and I have interest in ...

Umesh Lokhande•1/19/24, 5:35 AM

Hi, @harsha3755 as Aditya said start with the project and build a portfolio. There is an easy path and another is a little hard. The easy way is to get into any IoT company and work on software dev and you'll get a chance to work closely with an embedded team and then start adding value with cross-functional skills. In any IoT job profile, you'll be dealing with h/w anyway. Another route is to pick a development board, understand OS, memory management in detail, and learn to write drivers for peripheral interfaces, take some internships that will focus on firmware. And you'll get the title embedded firmware. I hope this may help. Good luck and best wishes!

SSaßì Friendly Reminder about Upcoming Event https://discord.com/invite/McSvxeCg?event...

tahenan•1/19/24, 5:37 AM

Just a suggestion for this, instead of hosting it here we can have our x (twitter) space where there is more chance of publicity and other can listen in too

Aditya thakekarOP•1/19/24, 5:39 AM

Right there are two major aspects.

If you have financial responsibility, always make sure you start in part time and work on your interests as an intern or just help people around as a side hustle.
If you genuinely love building Electronics project, and you wish to get a job in software or hardware, then approach a startup and work with them for atleast a year or two where you will learn a hard skill.
Build your soft skill in parallel. But always keep in mind, don't go behind any field just because grass is greener at the other end. Make sure you truly enjoy doing things. Else frustration builds up.

Ttahenan Just a suggestion for this, instead of hosting it here we can have our x (twitte...

Aditya thakekarOP•1/19/24, 5:40 AM

Great suggestion... Twitter spaces is much better interaction tool.