Questions tagged [production]

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70
votes
10answers
14k views

Why did LEDs take so long to appear as light bulbs?

LEDs are an old technology, why did the industries take so long to put them into light bulbs? Was there any technological gap missing?
25
votes
3answers
3k views

FCC and CE Testing / Failure Resolution

I'm seriously thinking about (practically committed to) taking one of my products through FCC and EC testing and it's my first time doing so. It's Arduino based electronics running off a 16MHz crystal ...
16
votes
6answers
809 views

How can I evaluate or speculate on a part's production lifetime for long term part sourcing?

Suppose I have an idea for a product, where if it were successful, would be in production for 5-10 years. How can I make decisions on what parts to use now such that they will still be available to ...
15
votes
3answers
2k views

Replace SOT-23 (5 pin) package in production with wire

I have found a hardware bug on a board design after many PCBs have been manufactured but not populated. I can fix the problem by removing a SOT-23 component and putting a wire across two of the pads. ...
15
votes
4answers
2k views

Using decapped ICs in production

We were looking for a very specific type of ADC in a small package for one of our projects, and found something suitable in a TSSOP. We wanted to save more space, so looked into getting bare dies; the ...
14
votes
3answers
367 views

Question about long-term support for legacy board designs

This question is summarized from a discussion on the Electrical Engineering StackExchange chat. It is reproduced here in hopes to generate a discussion with long-term value Question for anyone with ...
14
votes
1answer
1k views

Legal obligations when designing electronics

I'm planning on releasing a USB powered device, basically a AVR ATMega2560 µC with a FTDI FT232RL chip powered by USB-C. Although I'm comfortable with the safety of the device (has fuses, ferrite ...
14
votes
2answers
335 views

Taking a device to market [closed]

I have somehow managed to make a little gizmo that primarily consists of an MCU, some sensors, and wireless connectivity. I have gone through the process of making the initial prototype, then designed ...
10
votes
4answers
284 views

Do modern processors have redundancy in their logic units to compensate production faults?

Modern processors consist of billions of transistors and new production technologies often have problems with the yield, at least in the first months, but I guess that even after years there will be ...
9
votes
6answers
2k views

What makes a particular platform suitable or unsuitable for production use? [closed]

Let's assume that the cost of goods is an insignificant factor. If a company lacks a team to produce a custom board for a particular product, but has success with an off-the shelf development ...
8
votes
7answers
2k views

How come product makers tend to make their own boards rather than putting together modules?

It seems that most, if not all, companies that produce mass market goods use custom boards rather than putting together modules that are already available in the general market. For instance, battery ...
8
votes
2answers
7k views

Why should one buy through digikey or element14? [closed]

I quite often find that digikey or element14 have quite expensive pricing for the parts, right now I'm looking for memory chips and compare it to ebay sellsers: http://www.digikey.com/product-detail/...
8
votes
5answers
2k views

Can a generic 2.4 GHz transceiver be used on an 802.11x network?

I am prototyping a potential future product, and I am struggling to get my head around the complexities of using Wi-Fi components in it. I understand that Wi-Fi (or 802.11x) is primarily just a 2.4&...
8
votes
1answer
720 views

Surface Mount vs. PTH Components For Production

I'm a hobbyist who has developed a product which uses ~20 PTH components. The device is essentially an Arduino UNO with some extra driver ICs and LEDs. I have had quite a lot of positive feedback on ...
8
votes
3answers
1k views

What Regulatory Requirements are Really Necessary for Sale in the USA?

I understand that unless you fall into some specific product categories that are exempt from FCC regulations, electronic products sold in the US are legally required to meet FCC EMC limits. However, ...
8
votes
1answer
149 views

Do Soft Termination Caps Really Increase Reliability?

I'm managing several designs. At one point I identified a few failures that were caused by 0603 caps failing short. After that I switched to all soft-term caps to hopefully eliminate the problem. ...
8
votes
2answers
160 views

Is the maximum audible noise from power supplies regulated in Europe?

Power supplies make sometimes a lot noise in the range of kHz. Is there a regulation for the maximum allowed noise emission for consumer electronics on the European market? Is there a regulation ...
7
votes
2answers
1k views

How to manufacture chip on board?

I am a developer of a cheap product and i have no experience in mass production. Device is fully functional and represents a single sided PCB, a microcontroller, a bunch of diodes and a few passive ...
7
votes
2answers
2k views

How are through-hole boards mass-produced?

I'm familiar with the manufacturing process of surface mount boards. Chips come on reels (very high volume smaller parts), trays, or tubes. They are loaded into pick-n-place machines. The PCB, with ...
7
votes
1answer
249 views

Name for soldering a PCB orthogonally into another? Vertical castellation?

(image stolen from OK to connect boards perpendicularly like this?) Is there a name for the production method where say a base board (horizontal) has a slot milled into it with the solder mask open ...
6
votes
1answer
2k views

BLE Transmitter for Production

We would like to add a BLE transmitter to our board so that it can serve as an iBeacon (and whatever the non-Apple equivalent is known as). It seems like the engineers at Estimote and Stick n Find ...
6
votes
2answers
1k views

What stages do PCB mass-assembly techniques come in?

There's a spectrum of how you get PCBs assembled. 1) Have a human pick out all the parts, solder them all on by hand, and check them all by eye. Low cost of entry. Good for low-volume high-mix work. ...
6
votes
2answers
3k views

Serial Number Generation

I am working on a product that will need a unique serial number for each device. Are there any "recommended practices" for serial number generation? Since I never saw a device with serial number 1, ...
6
votes
1answer
300 views

Quantity less than one on Altium BOM

There are some items that goes on the BOM that, in production, apear as 1 for many. Example: large card box to package 10 boards/products. These kinds of items apear on the BOM as less than one ...
5
votes
6answers
618 views

How to prevent sealed in product battery drain on store shelf?

How can a microcontroller-based device prevent battery drain while the product is on the store shelf? We are creating a waterproof, sealed in product without any buttons. This means the battery is ...
5
votes
2answers
985 views

FPGA or Microcontroller for Production Design?

I have a very simple LED driver circuit connected to a 7 segment display and a couple of buttons. I want to move this design to production, on a scale of +1k units. I have implemented the design on ...
5
votes
2answers
5k views

In production, is there a significant difference between QFN or TQFP components other than space?

When producing a run of PCBs, does it matter if I choose QFN or TQFP components? Say, I want to have 1000 boards manufactured with an Atmel AVR that is available in QFN or TQFP packages. The QFN ...
5
votes
3answers
3k views

Is it possible to design an amplifier with a given gain from a random discrete JFET?

A few weeks ago, I played around with a discrete JFET bass preamp design I found online (http://www.albertkreuzer.com/preamp.htm). One thing I realized from analyzing the circuit, running simulations ...
4
votes
3answers
1k views

How to tell if an electronic component is counterfeit?

I've been looking into sites (like Alibaba, etc...) for components, but they are usually at the price of the rain. How can someone know if a company or factory is not a scam and that those components ...
4
votes
4answers
1k views

First production run - design PCB for through-hole or surface-mount?

I am nearing the stage after testing everything on a breadboard where I'm ready to fire up Eagle CAD and start developing my circuit board. This will be my first ever circuit board design. My question ...
4
votes
5answers
2k views

Injecting UUIDs into ROM during production

I'm brand new to electronics and was wondering if someone could explain to me how individual MCU/MPU-powered electronics units can be assigned unique identities on the factory line. For instance, ...
4
votes
1answer
3k views

How to mass-produce a electronic system assembled by me?

"Practically speaking", given I developed a electronic system (in my case with the Arduino board), what are next steps to make in order to produce and market that system (in my case, regardless of ...
4
votes
2answers
2k views

Using arduino code for mass production

I have prototyped a connected object with arduino and I would like to go for mass production, actually just a few hundreds to start. I'm going to design a customed PCB with everything integrated: ...
4
votes
3answers
242 views

Production budget

I'm trying to create a budget for producing a small electronic device that I've developed. I'm wondering if there is a template I could use or someone could link me to an article I could utilize to ...
3
votes
3answers
570 views

What design testing can I do before fabbing a PCB?

I'm an EE graduate who enjoyed the first taste of designing and fabricating hardware. My first board was a really low speed microcontroller board using mostly DIP and through-hole components, like ...
3
votes
3answers
836 views

How do I simplify microcontroller-based prototype into a sensible production-like circuit?

First some context: I'm an IT person by trade, and I dabble in electronics as a hobby. I have rather limited experience - apart from some toy circuits I've only made a single "production" quality ...
3
votes
4answers
1k views

Bulk programming with unique id

When programming hundreds of thousands (or more) MCUs or EEPROMs, it seems that companies need to add unique serial numbers to each programmed unit -- don't want two units with the same serial number. ...
3
votes
2answers
244 views

Frome tabletop prototype to a usable home device

I see a lot of questions dealing with going from prototype to production but I've got a more modest problem. I am building a couple of home automation devices for myself. I am able to build a table-...
3
votes
2answers
238 views

Reduce BOM Lines or reduce BOM cost? How to make production cheaper? [closed]

We are designing a product that will hopefully sell many thousand units, and now I am at the stage of specifying what parts to use. We require three inter-board connectors, one with 10contacts and ...
3
votes
1answer
996 views

What certifications are needed for GPS/GSM devices in AirPort?

I am kind new in industrial engineering my company has order for several devices which would be used in airport Technics cars. Do I need some kind of special certification for devices that I create to ...
3
votes
1answer
163 views

Watertight enclosures - what production steps are required to ensure no condensation on the insides?

Background We want to waterproof an electronic device and the specifications call for IP-65 protection. To this end, we have selected a sealed polycarbonate box to put the electronics in. The ...
2
votes
1answer
101 views

Term for a guarantee a manufacture makes that a product will be produced for a number of years?

Sometimes manufactures of electrical components guarantees that a product will be produced for a number of years so you can rely on getting new components for future production runs. What is the term ...
2
votes
2answers
239 views

Is advisable to drive an LED matrix using a Shift Register+FET on High side and an LED driver on the low side?

Trying to find the most economical way to drive 60 leds (~20mA) for volume production. Our main MCU doesn't have enough pins, so I2C or similar set up is needed and total budget of driving LEDS ...
2
votes
1answer
154 views

Optimizing product tests?

I'm currently working for a company where I design and implement an automated test program to test our products. Currently our tests take quite a bit of time (several minutes per unit) and need to ...
2
votes
1answer
1k views

Why are EI-cores (shell-type) most common for power transformers?

I notice that most small power transformers (single-phase, 100-240V, 50hz/60hz, laminated core) are shell-type, with an EI-shaped core. But as I understand they have relatively low efficiency due to ...
2
votes
1answer
222 views

Estimating Assembly costs II

This is a continuation of Estimating Assembly Cost which has addressed some approximations in estimating between North American and Asian assembly houses as price per pin. The question does not ...
2
votes
1answer
134 views

Product Price Question

At our company, we are in the process of finishing to develop a toy prototype. I need to estimate the "production" price of all the components. I was able to gather all the price from every ...
2
votes
0answers
2k views

Why don't I see the esp8266 chip in many commercial products? [closed]

I am a bit of a novice in the field of RF design, and I was looking around for an RF module to use in a project. I kept on noticing the ESP8266, which is pretty popular with hobbyists, but it's ...
1
vote
3answers
699 views

Advantage of series vs parallel battery in handheld product

There are many handheld product like laptop or an Handheld measurement equipment that all parts would works fine with 3.3V or lower VCC. However these devices still comes with a 11.1ٰV battery or ...
1
vote
2answers
88 views

From prototype to printed board - who does the translation from wired proto to circuit board [closed]

The question is broad, and I am sure that there is more than one way, but the generic sequence should follow a common pattern, and that's what I am looking for. I basically would like to move from ...