I hope this is not off topic, if yes, please let me know and I will delete post ASAP.

For those of you who manufacture low-volume electronics products which EMS/PCBA companies do you use and why (preferably Europe)?

I'm not looking for the cheapest option (although I would be glad to save some bucks) I'm interested in companies you've actually worked with and what made you choose them.

Things I'm curious about

communication and support

assembly quality

handling BOM substitutions

DFM feedback

MOQ and pricing

lead times

reliability over multiple production runs

I would also like to know roughly what production volumes you're building? I understand that for some of you small volume is > 50k :) but I am talking here about 50 to 1000 or so.

Didn’t find much discussion of this online, so was hoping to start some here.

For people who have founded hard-tech startups in particular: what were the worst experiences you faced? What parts of the hard-tech startup reality would make you tell someone to get as far away as possible?

My parts are all off the shelf Ex. Pi 4b.

If I manage to build something novel, useful, never before seen using off the shelf parts am I some how doomed? Logistically? Dependency wise? Replication Wise?

Is this common and I'm over thinking things?

been looking into apartment ventilation and hitting the same wall. people want fresh air to clear out CO2, but traditional ERV/HRV setups require drilling holes in exterior walls. For renters, thats a deposit-killer. Air purifiers just recirculate the same stale air.

I'm on a team researching a window-mounted fresh air system concept for renters, and the project name is cozeware freshflow. Trying to figure out why this market gap is still so awkward to navigate. Do renters actually care about CO2 enough to mount something in their window, or do they just crack it open and deal with the noise and bad outdoor AQI?

Not sure if a no drilling window setup is realistic for ground floor apartments or if the security risk kills it.

Specifically, for many hard-tech startups that do not require extremely sophisticated technology, if the first inventor had not existed, how much later would someone else likely have done something similar?

By “hard tech that does not require extremely sophisticated technology,” I mean physical products that could be created in a typical local makerspace (i.e. without specialized nanotechnology, advanced fabrication methods, etc.). For example, smart thermostats and basic robotics would fall into this category.

I would like to believe the answer is often “years later,” but I can also imagine the delay being only a few days to a month, because i) many hard-tech founders are actively looking for startup ideas; ii) many of the underlying problems are already well known; and iii) if the technology is relatively accessible, it seems especially likely that multiple people would try to solve the same problem around the same time.

Is this intuition correct? I'm looking specifically for rigorous quantitative analyses that try to estimate the “delay” for accessible hard-tech startups, not one-and-off anecdotes. If anybody knows of any rigorous analyses, it would be deeply appreciated.

Hi,

I'm a recent grad mechanical engineer. I did farm tyre optimization using fea in my FYP which I posted on my linkedin. It became a massive post for me. Many people reacted and commented on the post which helped me get my first client of cfd. Yes, not fea but cfd and it was totally irrelevant to me. But since the time to deliver the project was like 3 months so I decided to do it. I asked help from my professor which gave me like 15 minutes to guide me to do this and do that and you'll find a way which wasn't much of a help but that encourages me to continue it. I then asked my friends, who did FYP in cfd to help me and then that project with lots of help from different people completed successfully. I posted that project on linkedin too with testimonial from the client. I got two projects from referrals also but...

the problem is how can I maintain the consistent flow of customers so I don't have to do any other job and make this a full time business?

I'm looking for some electronics and Mechanical design engineers for a project that had.

It's a small form-factor device, around the size of a credit card.

The design complexity made my brain go haywire and decided it's better to get professionals on team. I've already talked to a few designers but none of them meet the requirement.

If anyone's interested hit a DM and discuss if it works for either sides.

Just I keep losing time jumping between tools, inventory in one place, emails in another, outreach in another. Do others find the business admin side as annoying as the actual hardware? Whats everyone's setup?

Hi everyone,

I'm a first-time hardware founder from India, and I'm trying to understand how companies actually build custom camera systems rather than just buying off-the-shelf cameras.

One thing that confuses me is this: people often say a phone uses a "Sony camera," but I know that's not the whole story. From what I've read, Sony usually supplies the image sensor, while other companies make the lens, camera module, ISP, autofocus system, etc. The final product is an integration of many different components.

My questions are:

If a startup wants to build a custom camera system, who do they contact first?

Should they approach Sony directly, or are there camera module manufacturers/system integrators who are a better starting point?

How do smartphone manufacturers and other hardware companies begin this process?

What kind of documentation, evaluation kits, or engineering support do sensor companies typically provide?

If you're a new founder with no previous hardware products, will companies like Sony even talk to you, or do they expect you to work through distributors or design partners first?

I want to understand the engineering and supply-chain workflow. If you've worked in smartphone cameras, embedded vision, robotics, or camera module development, I'd really appreciate hearing how this process works in the real world.

Thanks in advance!

Hi everyone,

I'm an audio hobbyist and a passionate electrical engineering student. I came up with this project as a way to sharpen my skills, with the ultimate goal of potentially turning it into a business if everything works out. I'd love to show you guys what I've been working on over the past couple of months, where the project stands today, and what I'm aiming to achieve next.

LytrixLabs is my take on a modular, future-proof audio system. It combines top-of-the-line audio signal processing with high-resolution 32-bit/768kHz DACs and the best integrated Class-D amplifiers on the market. By designing a fully modular ecosystem, expanding your setup is easy, and the system can seamlessly adapt as better ICs are developed.

All of this will be housed in what I hope becomes a beautiful chassis featuring solid wooden side panels and a brushed aluminum finish. A 7-inch IPS touchscreen keeps the UI intuitive and adaptable, and of course, a nice, large, satisfying volume knob is a must.

Quick Overview of the Device

https://preview.redd.it/eofcdxsz0lah1.png?width=1060&format=png&auto=webp&s=84150ca2fa53d462c10ea5924f213bcab2d56622

The internal CPU is powerful, potentially allowing for spatial audio decoding through eARC and outputting up to ~24 audio channels at 32-bit/768kHz. It also features a dedicated DSP for extensive audio processing and room correction. On the input side, up to ~12 channels are available, making room for phono preamplifier/ADC modules, balanced XLR inputs, or even microphones and instruments.

And the best part? If this works out, I plan to create an open-source, well-documented template for the audio modules. This will allow anyone to adapt their amplifier setup to their specific needs (at their own risk, of course!).

Preliminary Specifications:

• Passive Cooling: Entirely passively cooled, no fan noise.
• Power: Up to 300W of continuous power draw spread across the amplifier, with a 500W+ peak.
• Connectivity: HDMI eARC input, SPDIF input & output, 1Gb ethernet, and Bluetooth 5.3 & WiFi 6 support via an M.2 E-key slot.
• Modular Capacity: 6 module slots, supporting 4 audio channels in both directions.
• USB Ports: 2x USB connections (1x USB-C for digital audio input, 1x USB-A for playback from storage drives, offline firmware updates, and calibration microphone functionality).
• Control: Trigger outputs allow for powering external equipment on/off, enabling a one-click bootup when combined with HDMI-CEC. A classic IR receiver is also included, making it compatible with any remote.
• Smart Monitoring: Power and temperature sensing on every module allows for real-time system monitoring. Gradual, automatic adjustments to output gain can be applied to match your specific setup, ensuring you get maximum output power without hard voltage drops or overheating.

Planned Modules (Would love your suggestions!):

All modules integrate DACs and ADCs supporting up to 32-bit/768kHz audio. They utilize COG and film capacitors in the audio path, along with top-notch op-amps and the best currently available integrated Class-D solutions.

Outputs:

• 1x 200W amplifier
• 2x 100W amplifier
• 4x 50W amplifier
• 4x RCA outputs
• 4x Balanced XLR outputs
• 3.5mm & 6.3mm headphone outputs with high-impedance support

Inputs & Others:

• 1x RCA & 1x Phono inputs
• 2x XLR / 2x 6.3mm inputs (combined ports)
• 5:1 HDMI 2.1 switch

What I've Achieved So Far

The first prototype module (right) and test carrier board (left), freshly soldered.

As you can see, I am using a PCIe x4 connector for the modules because it is standard, affordable, and widely available. However, I’ve already realized I will need more pins for the next revision, so I will likely switch to PCIe x8. The current carrier board simply breaks out the audio and communication signals while providing the necessary power rails to the module.

The module, plugged into the test carrier.

The Module Breakdown (Preliminary Component Selection):

1. Power & Data: Power, audio, and communication signals enter through the PCIe connector.
2. Control: A microcontroller (STM32F030) communicates with the main carrier board and manages all on-board peripherals (bottom left).
3. DAC: The audio DAC (AK4493) is placed at the top left, furthest away from sources that might cause EMI or crosstalk. Extremely low-noise LDOs provide the clean power rails required for the 32-bit DAC to perform.
4. Buffering: An op-amp gain/buffering stage (OPA1642) prevents loading the DAC. We use these audio-specialized op-amps alongside linear COG capacitors to preserve signal integrity.
5. Amplification: Finally, the Class-D amplifier IC (TPA3255), along with its heatsink and output stage filtering, is located on the right side of the module near the physical outputs.
6. UI/Debug: An indicator RGB-LED on the back allows for per-module statistics or debugging.
7. Telemetry: A power sensor at the bottom monitors power consumption for each individual module.

Here is the full test setup using a 3D-printed fixture for stability, with the USB audio source on the bottom left and the programming interface clamped above it.

Of course, PCB designs rarely go perfectly to plan. I made a few mistakes with the communication routing and ran into some programming inconsistencies. However, with a cut trace and a few bodge wires, I managed to get the core features up and running. Most importantly, I took note of the mistakes so they can be easily fixed in the next revision.

First successful clean output!

Eventually, I was able to write the firmware, configure the hardware, and successfully output sound over USB! Sadly, I don't own the specialized equipment needed for precise audio measurements (like THD+N or SNR), but I've done some listening tests and it sounds great so far.

Next Steps: The Motherboard

With the individual modules working, I’ve started designing the main motherboard/carrier board. This is the backbone that the modules plug into, housing the primary processor and all main I/O.

https://preview.redd.it/2grca0jz0lah1.png?width=1187&format=png&auto=webp&s=85b9e38d01d11fe1616719cdb52951c9b0f1e220

I won't share too many details just yet, but it is by far the most complex board I've ever designed. So far, I have the CPU and its LPDDR4 memory placed and routed. Right now, I'm still working up the rest of the schematics and attempting to simulate the LPDDR4 memory layout.

The Motivation Behind It All

This entire project stemmed from my own search for an amplifier that would let me easily set up a digital crossover for my electrostatic speakers, which require separate audio inputs for the lows and highs. I wanted a single, integrated amplifier to handle this, rather than a cluttered "cable-spaghetti" mess of separate audio sources, DSP modules, and amplifiers.

My apologies to the non-engineers for all the technical jargon, but I hope some of you find the breakdown interesting! There is still a ton of work to do, and progress can be slow since I study full-time and work on the side.

Stay tuned for updates, and I'll do my best to answer any questions you have in the comments! (:

If you've tried getting a custom PCB built in India, you know the drill, weeks for a design house to even understand your requirements, endless revision cycles, engineers billing hours for miscommunication. Your timeline is dead before a single component is placed. And that's if you found a good design house most treat your project like a queue number.

Even after the design, you're stuck coordinating fabrication, sourcing, assembly, and testing across separate vendors. More time, more money, more delays.

If you're a founder, researcher, student, or maker who knows what you want to build but isn't an electronics engineer, you're locked out entirely. KiCad, Altium, even newer AI tools like Flux and Quilter still need a trained engineer at the wheel. So you default to the slow, expensive design house no alternative.

That's the real problem: the knowledge barrier and the time barrier compound, and together they kill most hardware ideas before they become products.

I'm building a platform to remove both. Describe what your product needs to do, or drag and drop the modules you need the platform generates a schematic in minutes with a live preview. Our team reviews it before it moves forward. Then the full PCB design layout, routing, power integrity gets generated, and you get production-ready Gerbers, ready for any fab house. Want a finished product in hand? We handle sourcing, fabrication, assembly, and testing too. One platform, one conversation, complete product.

Early stage right now. I want to talk to anyone who's felt this pain founders, engineers, students, researchers, makers anyone with a hardware idea that got stuck.

Not selling anything. Just want to understand your experience. Drop a comment or DM.

I'm going to an event next month for people who will be my potential customers. I can't do 3d rendering yet because of IP. What other printed materials should I look into, if any?

In general, what preliminary paperwork does it make sense to prepare at the earliest stages for customers and/or investors?

Thanks so much

Joe

Im a two time hardware founder and Ive been trying to explore how to make prelaunch better cause in it's current state it's boring and email converts at a pretty low rate from my experience. Ive been wanting to create a page that has referral links for early signups where the more they refer others the more discount they get along with greater discount for more valuable info like phone number.

Question: Would you pay for a website builder that is single page and has these referral features, and bonus discounts for user offering more info and joining gc?

TLDR: Prelaunch is boring for customers and lacks viral sharing, would you pay for single page website builder that optimizes prelaunch?

Hey guys,

I’m 14, and for the last few months, I’ve been obsessed with this idea. I finally stopped daydreaming and decided to actually build a prototype. The goal is a minimalist smart pen that tracks handwriting/movements and syncs it with a mobile app in real time, focusing heavily on a clean aesthetic rather than the bulky commercial options out there.

Since I don't have the budget to order custom integrated PCBs from a factory right now, I'm trying to pack standard off-the-shelf micro components inside a regular clear multi-ink pen barrel.

Here is the current hardware plan:

Controller: ESP32-C3 SuperMini because it has built-in BLE and fits the form factor.

Sensor: MPU-6050 gyroscope and accelerometer stacked to track XYZ axis movements.

Power: A tiny 3.7V Li-Po pin battery with an integrated BMS, wrapped in black heat shrink for insulation.

Charging: A micro Type-C breakout board fitted into the top back cap.

UI: Micro tactile SMD buttons with a tiny micro LED setup. When you press the physical button, the LED fades and changes colors via software PWM, while simultaneously sending a BLE packet to the companion app so the app's digital UI instantly switches colors to match the physical state of the pen.

For the app I will be creating a simple app from Loveable for the prototype testing

The biggest mechanical hurdle right now is routing hair-thin jumper wires along the inner plastic walls so they don't get snagged by the mechanical ink refill sliders when they move back and forth.

But besides the hardware layout, I really want feedback on the overall idea itself. Do you think a minimalist, highly interactive smart pen that connects with a custom companion app actually has a market among students and creators, or is it too niche?

Given my age and limited tools, am I overcomplicating the feature set for a first prototype, or does this sound like a viable MVP to pitch?

Be as brutal as possible with the feedback. I really want to learn and improve this. Thanks.

I’m working on an AI hardware project and have been going back and forth between SF and Shenzhen.

Over the past year I’ve talked to a bunch of factories, module vendors, device makers, and suppliers in China. After seeing enough of the process up close, it changed how I think about China manufacturing.

The part I didn’t expect is that “finding a factory” is usually not the real hard part.

The messy part usually starts before that. Which features sound good on paper, but start creating problems with battery, heat, weight, or assembly?

If a module involves cameras, mics, data, or cloud services, does it create compliance issues in the market you want to sell into?

And when two factories say they can make the “same” thing, how do you tell what is actually different?

For AI hardware, everything starts touching everything else. Change the size and battery gets harder. Add more sensors and now heat is a problem. Change the structure and assembly/yield start moving too.

So a lot of the real work happens before production even starts.

I used to think China manufacturing was mostly about finding the right supplier. Now I think a lot of it is knowing what you actually want them to build, and what you’re okay giving up.

I’ve made plenty of mistakes here myself, so I’m mostly trying to compare notes with people dealing with the same thing.

Is anyone here building AI hardware or smart devices right now? Smart glasses, wearables, voice devices, personal AI devices, weird consumer hardware, anything like that.

Where are you getting stuck with China manufacturing?

• Supplier search?
• Module choices?
• ODM vs custom?
• Compliance?
• Quality control?

Curious what others are running into. If you’re dealing with China manufacturing questions, feel free to comment or DM me. I can share what I’ve seen from the Shenzhen side if useful.

I am building automation systems for construction and construction aid companies but i had an idea to build systems for them as well. It is a beta project so I need 2 companies that are interested for me to test the systems with no payment for 60 days. Would anyone like to try it out