Hi @pallavaggarwal Just for fun I built a battery-operated handheld calculator around 8-bit ATmega32

Hi @pallavaggarwal Just for fun I built a battery-operated handheld calculator around 8-bit ATmega328 MCU. Here is a live demo: https://www.facebook.com/reel/259501753618035

28 reactions · 6 comments | Calculator built around 8-bit ATmega328...

Calculator built around 8-bit ATmega328 Microcontroller. This embedded device powered on 3.7V DC battery and AVR MCU. This project is inspired by "Volos Project". It's an amazing experience to build...

UUmesh Lokhande Hi @pallavaggarwal Just for fun I built a battery-operated handheld calculator a...

pallavaggarwal•2/16/24, 10:26 AM

Oh wow, this is great

Ppallavaggarwal Oh wow, this is great👍👍

Umesh LokhandeOP•2/16/24, 10:29 AM

Thank you, I'm glad you liked it!

pallavaggarwal•2/16/24, 10:31 AM

just saw the video

pallavaggarwal•2/16/24, 10:31 AM

did u end up making the finished version?

Ppallavaggarwal did u end up making the finished version?

Umesh LokhandeOP•2/16/24, 10:39 AM

you mean on actual PCB? I have to find time this summer to convert this working circuit from the Protoboard to the real PCB with casing. but I enjoyed this weekend project

pallavaggarwal•2/16/24, 10:42 AM

yes, actual PCB version

pallavaggarwal•2/16/24, 10:43 AM

it would be great make that func project with latest CH32V003

Ppallavaggarwal it would be great make that func project with latest CH32V003 🙂

Umesh LokhandeOP•2/16/24, 10:50 AM

Sure, it can be done with CH32V003. All you need is plenty of GPIO Pins for buttons and I2C Pins for OLED Display that's all. Firmware is also very simple. I'll drop the circuit & code later today in case you wish to review. I skipped some capacitors in my case to avoid hand solder.

pallavaggarwal•2/16/24, 10:53 AM

Yeah sure. I like you being lazy and leaving poor caps home

pallavaggarwal•2/16/24, 10:54 AM

:salute:

John Eric•2/16/24, 11:43 AM

Hey guys, when is todays office hours taking place @here

John Eric•2/16/24, 11:45 AM

And what is it all about?

JJohn Eric Hey guys, when is todays **office hours** taking place @here

Saßì•2/16/24, 12:08 PM

https://discord.com/invite/k4vecfQ9?event=1205552755935154186

d1sc0•2/16/24, 12:59 PM

Hello , im currently working on a small project involving esp32 and mqtt and ive not been able to troubleshoot an issue for a week , where could I get some guidance on the issue

Dd1sc0 Hello , im currently working on a small project involving esp32 and mqtt and iv...

Umesh LokhandeOP•2/16/24, 1:08 PM

Hi @d1sc0 Feel free to post detailed questions related to ESP32 and MQTT Protocol inside@MCU, MPU & Kits. If it's just a quick tip then dev-chat will be fine

d1sc0•2/16/24, 1:09 PM

Okay thanks , will post

JJohn Eric Hey guys, when is todays **office hours** taking place @here

techielew•2/16/24, 1:32 PM

Hey @John Eric, here’s the topic for today: https://discord.com/channels/1130679493799977062/1207862407028932659: “Who is your engineering hero? Identifying, engaging, and maximizing technology mentors.”

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Saßì•2/16/24, 1:33 PM

@d1sc0 Welcome,! We're happy to have you as a DevHead. Feel free to let us know what you're working on now and a bit about your technical background.

Ttechielew Hey @John Eric, here’s the topic for today: https://discord.com/channels/1130679...

John Eric•2/16/24, 1:33 PM

Thanks

JJohn Eric Thanks

techielew•2/16/24, 2:17 PM

Hey @everyone,
We'll be starting this week's Office Hours in about 45 minutes. See the link to join above or in the "Events" tab on the left menu. Come ready to share about your technology mentor!

See you soon!

Saßì•2/16/24, 2:59 PM

Get Ready
https://discord.com/invite/k4vecfQ9?event=1205552755935154186

techielew•2/16/24, 11:00 PM

Hey @wafa, welcome! Tell us a bit about your technical background and any projects you're working on

techielew•2/17/24, 8:04 AM

Hey guys (especially @MCU, MPU & Kits devs), we just launched a new #polls to see what MCU architecture everyone is designing on (or would prefer to be designing on). Check it out: https://discord.com/channels/1130679493799977062/1199293807737450538/1208322777757519952

Ttechielew Hey guys (especially @MCU, MPU & Kits devs), we just launched a new #polls to se...

onky•2/17/24, 8:07 AM

Missing MSP430

Oonky Missing MSP430 😅

techielew•2/17/24, 8:07 AM

If I added it would you vote for it lol?

onky•2/17/24, 8:08 AM

Yes, I am working on one. Low power device.

onky•2/17/24, 8:09 AM

STM has killed most of the competition. Firmware libs from TI is painful compared to ST

Oonky Yes, I am working on one. Low power device.

techielew•2/17/24, 8:11 AM

* First, let @pallavaggarwal know what you're working on. He was curious about low-power device designs in server.

* Second, I just added a comment on the poll to reply with any device/architecture that's missing. We should track this over time.

* Yes. Everything but ESP and AVR and RP2040 (curious if anyone will comment that last one out :))

Ttechielew * First, let @pallavaggarwal know what you're working on. He was curious about l...

techielew•2/17/24, 8:15 AM

I lied. I actually want to know what your low-power device design is too, @onky lol. And why is it on MSP430?

onky•2/17/24, 8:19 AM

I am working on loop powered instrument, max current consumption for the whole circuit must be less than 4mA. The customer is old school has trust in MSP430 and wants me to use the same.

Oonky I am working on loop powered instrument, max current consumption for the whole c...

techielew•2/17/24, 8:24 AM

What's your tech background and current job?

Ttechielew What's your tech background and current job?

onky•2/17/24, 8:28 AM

Bachelor’s in Instrumentation & controls then Masters in Embedded systems. Currently working as an Application Engineer with ADlink technology, an Edge computing company.

Oonky I am working on loop powered instrument, max current consumption for the whole c...

onky•2/17/24, 8:30 AM

This is personal project.

Oonky This is personal project.

techielew•2/17/24, 8:31 AM

I was going to say MSP430 isn't a typical ADLINK project

Ttechielew I was going to say MSP430 isn't a typical ADLINK project

onky•2/17/24, 8:31 AM

Part time work.

Ttechielew Hey guys (especially @MCU, MPU & Kits devs), we just launched a new #polls to se...

techielew•2/17/24, 9:06 AM

Don't forget to vote on your MCU architecture of choice, devs! You have 1 week!

wafa_ath•2/17/24, 10:18 AM

Hey , i am using mqtt in iot project , i wanna ask if the publisher can switch rolls with the receiver , after the receiver get a notification (the receiver become a publisher and the publisher become a receive), do you have guys any idea how to do that ?

Wwafa_ath Hey , i am using mqtt in iot project , i wanna ask if the publisher can switch r...

Umesh LokhandeOP•2/17/24, 11:25 AM

Hi, @wafa_athmani , Publisher, and Subscriber both can send and receive data i.e. payload back and forth. This can be managed by the MQTT Broker so we as a client have to do nothing apart from publishing the message and subscribing to the topic.

UUmesh Lokhande Hi, @wafa_athmani , Publisher, and Subscriber both can send and receive data *i....

wafa_ath•2/17/24, 3:26 PM

Yes but can one be publisher and also subscriber to the same topic ! For example receive the message or the notification from publisher and then after became a publisher ( to the same topic)

Wwafa_ath Yes but can one be publisher and also subscriber to the same topic ! For example...

techielew•2/17/24, 3:59 PM

@LMtx

aymen ammari•2/17/24, 4:18 PM

Hi everyone I'm Aymen ammari 23 yo I have licence degree in electronic engineering currently studying and working independently and I'm honoured to be a part of this community

Saßì•2/17/24, 4:18 PM

@aymen ammari Welcome,! We're happy to have you as a DevHead. Feel free to let us know what you're working on now and a bit about your technical background.

SSaßì @aymen ammari Welcome,! We're happy to have you as a DevHead. Feel free to let ...

aymen ammari•2/17/24, 4:20 PM

I work as robotic teacher for kids I deal alot with arduino and microbit and I participate in tournaments and I also help students in their projects

Wwafa_ath Yes but can one be publisher and also subscriber to the same topic ! For example...

LMtx•2/17/24, 4:23 PM

You can both subscribe and publish to the same MQTT topic, but that is not a good design practice. Please describe your use case in more details.

aymen ammari•2/17/24, 4:26 PM

Now I'm working on IOT smart home / sick pacient control using esp32 and remotexy cloud, doed anyone worked with heart beat sensor in remotexy environment??

aymen ammari•2/17/24, 4:28 PM

Have anyone worked with Max30102 sensor let us know?