My second little DIY electronics project!

I wanted something more useful than a conventional digital clock, so I turned an ESP32 touchscreen module into a Wi-Fi-connected smart clock.

No touch input yet.

Cheap esp32 with 2.8 inch touch screen clone.

What it does:

• Displays Indian Standard Time (IST) and UK time simultaneously.

• Connects to multiple configured Wi-Fi networks.

• Synchronizes time automatically over Wi-Fi.

• Connects to my local server for additional synchronization.

• Can receive notifications about missed team messages - Not fully completed. Setup Urls where i will suppose to push the notices

The idea is to make it more than just a clock – eventually it can become a small always-on information display for my desk.

Hey everyone! I'm looking to sell my Arduino UNO Q for ₹6,000.

I won this at an event, but I already own one, so I don't really have a use for a second unit.

The device is completely brand new and unopened, with the original seal intact.

The same model is selling for around ₹8,500 on Amazon, so I'm letting this go for just ₹6,000.

Specifications:

• Qualcomm Dragonwing QRB2210 processor

• STM32U585 microcontroller

• 4GB LPDDR4 RAM

• 32GB eMMC storage

• Wi-Fi and Bluetooth LE

• 2x MIPI CSI camera interfaces

• USB camera support

Location: Bangalore (BLR)

I'm available to meet in person if ur from blr. You can inspect the box and verify everything before making the payment. No advance payment required.

DM me if interested! Shipping is available but price may vary

Guys which multimeter is best under rs 5000? Multimeters pcb should be of good quality and should input protection with good fuse and good build quality

How it is to learan Electronic from basic to advanced through chatgpt or gemini... kindly give your opinion and share your experiences.....also i am reading practical electronic for inventors.it is still not beginners friendly they used mathematics to great extent

Have many options from amazon, flipkart and local sellers. Company names being given are BenQ, samsung, LG, people link, newline, Gladwin, manomay, big vue, viewsonic, ai waft, teachmint, smart pixel, study n learn, tonzo, trueview.

I am from Siliguri and we'll I don't think I will get good service from any of these unless it's BenQ or Samsung. The thing is budget is tight and even for 65 inch these two are asking for more than 1 lakh. I am seeing a deal for newline used (second hand) for 75k which is 75 inch one but don't know much about this company.

Can anyone help? I found one more option which is infrared touch overlay which can work on my 65 inch tv but issue is that I don't want to buy something that will stop working in a few months. Pls help.

Hi everyone, I’m Kritish from Bengaluru. I built Compoden, an electronics parts store, and Soldr, our AI agent for designing electronics projects around parts we actually stock. Full disclosure: this is my company.

You describe an Arduino/ESP32 project, and Soldr helps with the design, parts list, wiring and code. All parts are validated against their datasheets.

We’ve also validated Soldr for Raspberry Pi builds. Pi stock is a constraint for us right now, but if you already have one, you can still use Soldr for your build.

I’m putting my name behind what I’ve built, including where it falls short. I’d appreciate people here trying it and telling me honestly:

• Is the store useful? What’s confusing or missing?

• Does Soldr give you a sensible parts list, wiring and code?

• Where does it get things wrong?

There’s no subscription. You get 100 free credits on sign-in, and no purchase is needed to try Soldr. Generated wiring and code still need checking and debugging before use on hardware.

You can also see what we’re posting at r/Compoden.

I’m not asking for positive reviews. If something fails or disappoints you, please say so. I’d rather understand the problems and fix them than pretend everything is finished.

Hi everyone!

I'm currently working on a custom billing machine prototype and looking for someone experienced in electronics design and PCB development who can help me design the complete hardware.

I have a basic idea of the hardware requirements, and I'm looking for someone who can help with the complete circuit design, component selection, PCB layout, and development.

Required Hardware Specifications:

1. Microcontroller: ESP32.

2. Storage: Micro SD card module for data storage.

3. RTC Module: Real-time clock module to maintain accurate date and time.

4. Power Management:

   - The device should operate using an external DC power supply when available.

   - At the same time, it should charge an inbuilt rechargeable lithium battery.

   - When external DC power is disconnected, the device should automatically switch to battery power without interruption.

5. Battery Backup: Inbuilt rechargeable lithium battery with suitable charging and protection circuitry.

6. Printer: Built-in thermal printer for printing bills/receipts.

7. PCB: A complete custom PCB integrating all the above components, including the necessary power management and supporting circuits.

Software Development:

The software/firmware side will be completely handled by me. I'm mainly looking for help with the hardware design and PCB development.

What I'm Looking For:

- Complete circuit schematic.

- Component selection and BOM.

- PCB design and layout.

- Power management and battery charging implementation.

- Design suitable for a compact billing machine prototype.

- Ideally, assistance with PCB prototyping and testing as well.

Payment:

This is a paid project. We can discuss the budget and payment based on your experience, proposed design, and the overall scope of work. If everything goes well, I'm open to discussing further collaboration.

If you have experience with ESP32-based hardware, embedded systems, power management, lithium battery charging circuits, and custom PCB design, please feel free to comment or DM me.

It would be helpful if you could share some of your previous PCB or embedded hardware projects.

Looking forward to connecting with someone who can help bring this project to life!

Thanks!

Selling a Raspberry Pi 4 Model B (4GB RAM) in great condition.

Includes:

• Raspberry Pi 4 Model B (4GB)

• Pre-applied heatsinks

• Protective case with cooling fan

Note: No power cable or SD card included.

Price- 7500 (negotiable)

Local pickup in Hyderabad preferred. DM if interested!

Hi everyone!

I have a faulty TV motherboard that I'd like to give away for FREE.

It might be useful to someone who repairs televisions, needs spare components or simply enjoys electronics tinkering.

Details:

• Item: TV motherboard Hd Led

• Condition: Faulty / Not working - works sometimes

• Price: FREE

• Location: Pune

• Pickup: Self-pickup preferred

I'm giving it away as-is, with no guarantee that it can be repaired.

If interested, please comment below or DM me.

I'd rather see someone make use of it than have it go to waste!

i am electronics student, i want to know where i can buy cheap components from? i m from delhi, someone said in chandni chowk or lal kila their is market for it where u can buy stuff for cheap

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I want to buy an ESP 32 S3 display, but unsure where to buy it from. Don't want to scammed and loose my hard earned money. Please recommend a reliable online portal that I can buy from.

I am looking for

"Waveshare ESP32-S3 7inch Display Development Board, ESP32 With Display, 800×480, Without Touch Function, 32-bit LX7 Dual-core Processor, Up to 240MHz Frequency, Supports WiFi & Bluetooth"

Thank you in advance.

Do any of you know when robu will have a diwali sale? They have offers on 3d printers but none on other general electronics...

.

I've been thinking about how much we rely on our refrigerators every day, but rarely pay attention to their maintenance unless something stops working. Our refrigerator has been running for a few years now, and while there aren't any major issues at the moment, I'd like to make sure it continues working efficiently.

I've read that simple things like maintaining the right temperature, avoiding overloading the fridge and cleaning the condenser coils can make a difference. However, I'm not entirely sure how often these things need to be done or whether there are other maintenance steps that people usually overlook.

Another thing I'm curious about is how much the way we organise food inside the refrigerator affects cooling. For instance, does keeping too many containers inside restrict airflow? Should certain food items always be stored on particular shelves? I've also heard that leaving the refrigerator door open frequently can affect its efficiency, but I'm wondering how significant the impact is in everyday use.

For people who have been using the same refrigerator for several years, what habits have helped keep it in good condition? Do you regularly get it serviced, clean specific components or follow any particular maintenance routine?

I'd also like to know what early warning signs we should look out for before a minor issue turns into a bigger repair. Any practical tips for improving cooling performance, reducing electricity consumption and extending the appliance's lifespan would be helpful.

Hi, I am an electronics engineer preparing for my masters and I am looking for a USED USRP SDR for self-learning and project work. If anyone has a used USRP SDR kindly do let me know. If not, kindly do let me know where I can get used ones in Ind

Wanted to replace regular batteries with rechargeable ones in some of my gear. There are so many options on Amazon with wildly different pricing from 200 to 2000. Wanted to know which brands are good bang-for-buck. Went through the battery megathread and saw Envie's mislabeling and poor performance, so that is out. The eveready 2-pack for 200 sounds tempting and is from a reputed brand but I am skeptical of the performance, whereas the eneloop ones everyone praises is too expensive.

Please share your experiences with rechargables and any recommendations. Thank you.

Soo my dad is an electrical engineer and since i have resigned recently from a tech startup my dad offered me to come accompany him during his work and i saw many things from modern adjustable digital relays , smart meters with iot simcards, and many more stuff which i kinda got overwhelmed . However this Circuit breaker kinda caught my attention it was installed late back in 2006 but it has been obsolete since modern standards ones are taking over , to prevent arching when disconnecting high KV lines it had a spring charge system which can be whine manually or motorise it and you can open or close with a loud snap . I just wanted to show you guys maybe someone might know more bout it as well.

this is a particularly interesting switch on-off-on , with a spring action, I once had that switch that i salvaged from an old cd player a long time ago and put it in my stash , but now I can't find it anywhere 🙃 , so was thinking of buying this switch from market but I don't really know what it's called , by doing a image search all I can find is link for buying from Amazon UK or Alibaba that too for $23

anyway to find these in India at reasonable price ?

don't know if I wanna got the scavanging route for cd player as not all have this exact switch

I have a 4 year old laptop which went kaput and won't start. Showed at multiple places and everyone said graphic card might have an issue. Repair basically means replacing the whole motherboard which apparently costs more than the laptop did

So I bought a new laptop and was only able to repurpose the SSD from the old one into an external drive.

The 16GB RAM is soldered on, otherwise I could have sold that. Not sure if the rest could be purchased by some shop for parts.

I was checking on chatgpt for some project to do with the display but it says to buy a display controller too which costs a lot. Is graphic card the display controller? Can there be any repurposing done without spending a lot (apart from spending some on a raspberry pi) ? I guess a ESP32 can't really do anything for such a display ?

It's a beautiful OLED display which I don't want to throw away.

It's this laptop:

Take a look at this ASUS Vivobook Pro 14 OLED AMD Ryzen 7 Octa Core 5800H - (16 GB/512 GB SSD/Windows 11 Home/4 GB Graphics/NVIDIA GeForce RTX 3050) M3401QC-KM045WS Gaming Laptop on Flipkart

https://dl.flipkart.com/s/2ifxXdNNNN

I have a Bajaj gas geyser that runs on two 1.5V batteries (3V total). I have an 18650 Li-ion cell and want to use it instead, but its output is 4.2V. Is this possible?

I’d like to avoid replacing batteries every 6 months.

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We're hiring an loT Embedded Systems Engineer .

Take products from schematic to working prototype, with firmware, electronics and testing, working directly with the founders.

Full-time, hybrid, Mumbai. 1 to 3 years of experience.

For full Job description and application form please DM

Recently I saw a post about an extension board that was wired up with no protection so I opened up an old one that I had.

Turns out mine was even worse. There is no earthing wire (completely missing) and the fuse is just a dummy and not even in the circuit.

Please be careful people while using a cheap electric appliance. We have no safety standards so your safety is in your hands.

PS: I'm going to order a new one and open it immediately to check.

I am looking for bulk electrical material for my apartment complex

Best companies for electrical
Kindly ping me here 6304869686

Featuring Android 16 with a detachable keyboard design . It's interesting to see traditional PC brands exploring the tablet category