Questions tagged [production]

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Can I trust a variable voltage step down converter to hold at a fixed voltage

I need a 70 watt capable 76 volt DC-DC supply. I cannot seem to find any readily available on the market, so I considering buying a step down converter such as the one pictured below and setting it to ...
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3 votes
1 answer
106 views

Using other boards than PCB for commercial electronics products

If one solders entire circuit components (such as resistors, caps, opamps) a board as in the following photo: Is this type of interfacing legal for commercial products? I'm wondering if there is any ...
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1 answer
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Surface Treatment choice for edge connector

So I have an edge connector that according to Alibaba Chinese salesman has tin-plated terminals (datasheet a bit unclear). I am making a product where I am inserting a PCB into an edge connector and I ...
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2 votes
2 answers
163 views

What is the meaning of the number after the comma in the product page? (e.g. BC547C,215)

Relevant links from Mouser and Digi-key: https://mouser.com/ProductDetail/Nexperia/BC847C235?qs=me8TqzrmIYWk6FelXF%2FgZA%3D%3D https://www.digikey.com/product-detail/en/nexperia-usa-inc/BC847CW-135/...
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1 answer
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When these prototype devices become commercialised/productionised, how is the signal processing aspect of the oscilloscope built in to the device? [closed]

I read a lot of research papers that use large and expensive equipment, such as oscilloscopes, to do their signal processing. Oscilloscopes offer high sampling rate and bandwidth, which makes them ...
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  • 1,201
0 votes
2 answers
85 views

THT components reliability and advantages for small scale production [closed]

Examining this question in the "manufacturing of not consumer electronics". I'm looking for an opinion by others about some statements that I take for correct. Are THT components in general ...
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7 votes
3 answers
1k views

Maximum Typical and minimum into datasheets. What is the distribution?

What is the probability of having a component with the minimum and maximum specified value into the datasheet ? I suppose this follow a normal law and the typical value is the mean : Have a nice day !...
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  • 1,450
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1 answer
121 views

How to determine if conventional electronics circuit is a better choice over a MCU?

I am a software engineer and have limited experience with conventional circuitry. Recently, I have built a prototype device that uses an Arduino Uno, a Bluetooth module, an array of temperature/...
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9 votes
2 answers
3k views

What does "Not recommended for new designs" mean in an ATtiny datasheet?

I am making my own circuit and I am using ATtiny10-TS8R (I couldn't buy any another type for now), but I found (6) in the datasheet on the part I want to use: As noted in point (6), it says "Not ...
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1 answer
61 views

Need help determining if a component is acceptable for use in a production design

For the sake of not going too broad, I am only referring to this single OLED LCD board component from Newegg being used directly within a prototype device that I have designed. My end goal is to take ...
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0 votes
1 answer
50 views

Need help understanding how motors, sensors and other components of a prototype design factor into certifications for industry sale [closed]

I have built a prototype and I now need to create a production prototype that I can use as my template for a small 10-15 product unit batch order. I am in the United States where I plan to market ...
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9 votes
7 answers
2k views

How critical is it to declare the manufacturer part number for a component within the BOM?

I've never seen a BOM that explicitly declares manufacturer part numbers for the components (except the obvious ones, like a microcontroller) in any kind of circuit schematics. According to my ...
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2 votes
1 answer
52 views

Padding between USB and panel

Our product has a hole on the metal panel for the USB2.0 type B port. However, due to the mechanic size variation, on some panels, the USB connector can't touch the panel at all. As indicated in the ...
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  • 492
0 votes
1 answer
57 views

Evaluation kits explained

I am new to electronics and have been seeing a lot of so-called "evaluation kits" for certain MCUs. For example this Atmel SAM R21 Xplained Pro kit claims to be: "a hardware platform to ...
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0 votes
4 answers
341 views

Programming many Atmega328p at once for mass production

How can I program multiple ATmega328p at once? Like, for example, the Arduino Uno. How do they program it for mass manufacturing production?
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0 answers
51 views

Quintic QN8007B RoHS information?

We are planning to use the Quintic QN8007B FM transmitter in our new design because it is quite cheap and has I2S interface. I believe this chip is no longer produced, but it is possible to get hold ...
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1 vote
1 answer
152 views

Best tool bits for PCB cut outs (board shapes and slots) when prototyping with desktop CNC milling machine?

I have a cheap desktop CNC that I have successfully done some PCB prototypes on using 10 and 30 degree 0.1mm V-bits. When it comes time to doing the cut-outs I started with a 1.5 mm end mill with four ...
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  • 475
16 votes
6 answers
2k views

How do professional designs compensate for offset voltage in opamps?

I am new to electronics and have been told in class to always add precision potentiometers to compensate for input offset voltages in opamps for signal conditioning. My concern is that this offset ...
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0 votes
1 answer
39 views

Project Considerations: From POC to Consumer product [closed]

I come to you for advice. I am a software engineer with some background in electronics, since I studied mechatronics engineering. However I would say that my experience with electronic projects has ...
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1 vote
0 answers
82 views

Solder QFN88 by Hand

I just received my newest board i've designed and wanted to solder the first prototype. One of my Chips has a QFN88 Footprint. I'm quite experienced, but i just couldn't do it. Because of the small ...
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0 votes
1 answer
107 views

Test-jig for the display system

We have a system in which is an HMI with a display. To test a system, I have to connect the LCD and six more cables to the board. As the LCD has an FPC cable, it will take more time compared to the ...
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1 vote
1 answer
109 views

Hi Pot / Dielectric Pass/Fail Recording

I just graduated last year with an Electrical Engineering degree. Currently pursuing a Masters's Degree, so I am fairly new to design. We have several HiPot Testers we use on the manufacturing line. ...
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2 votes
2 answers
2k views

How dangerous is soldering? [duplicate]

Around six months ago, I did some light solder work in my room. I was pretty reckless with the lead solder, and even ate while soldering on several occasions. Should I be worried about the lead ...
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0 votes
0 answers
511 views

Assembling helical antenna in production

How is small PCB mounted helical antennas (100 MHz - 1 GHz) assembled in PCB production? See picture below. I have thought about mounting it both horizontally and vertically, but I can not figure out ...
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1 vote
2 answers
331 views

How can I program an SOC without a hardware kit?

I am new to the production side of electronics. I was wondering if I can directly use a DA14683 to implement a size-constrained project. I have a few queries in mind Is interfacing a SOC similar to ...
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0 votes
1 answer
215 views

How large is the percentage of non silicon materials in overall production capacity for semiconductors?

Most of all semiconductors produced these days are made from silicon, as it is easy and cheap to manufacture in very well researched bulk processes. But some electronic devices require the physical ...
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  • 8,658
10 votes
4 answers
762 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 ...
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  • 8,658
1 vote
2 answers
53 views

Product Safety Testing - EU

I was recently hit with the thought as to what safety tests a domestic electronic product has to go through before it is sold to consumers more specifically in the EU? I have been looking through ...
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0 votes
1 answer
129 views

Sensing the higest reading from an array of NTC sensors

I have almost the opposite of this question: Multiple Parallel LED Drivers with Single Thermal Derating NTC Thermistor I have an array of devices which depending on operating condidion may run hot or ...
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  • 9,139
7 votes
1 answer
954 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 ...
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  • 9,139
0 votes
1 answer
62 views

Transform small Arduino protoboard project in a final solution

I am collecting data on consumption and solar production and I centralize it in a Raspberry with Openhab. Now I want to connect to Smart Grid Ready and/or Power Control of a Panasonic Aquarea ...
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12 votes
1 answer
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 ...
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0 votes
1 answer
177 views

Registering IOT products across Europe based on NodeMCU

We've been designing some smart home devices and softwares in past few years and they've been sold in some countries in middle-east. Basically, they were combination of ESP, Arduino and NodeMCU boards ...
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  • 103
1 vote
1 answer
116 views

I have an idea/invention and look for a real investor/industry to take it to the next level? [closed]

I checked many online resources/websites and all of them asked me to pay thousands of dollars to make it real! I couldn't find any one that says you don't have to pay and we will take it from here ...
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15 votes
4 answers
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 ...
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8 votes
1 answer
313 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. ...
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  • 4,903
9 votes
2 answers
2k 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 ...
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  • 320
15 votes
2 answers
397 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 ...
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3 votes
1 answer
265 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 ...
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  • 4,909
-3 votes
2 answers
184 views

Producing energy from lighting bolts

An average bolt of negative lightning carries a current of 30 to 50 kiloamperes, transfers a charge of 5 coulombs, and dissipates 500 megajoules of energy (120 kg TNT equivalent, or enough to light a ...
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  • 131
0 votes
1 answer
280 views

Mass producing my electronics/raspberry-pi idea - What are the steps? [closed]

Could somebody tell me what the rough steps would look like? I think I have a good idea. I have put things into practice, and it's working and so on, but it's very ugly. I guess, first I would have ...
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8 votes
2 answers
232 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 ...
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0 votes
2 answers
226 views

Microcontroller with and without debugging features?

Out of curiousity, are there any microcontrollers which are available with and without debugging capabilities? I'm asking because I assume that the debugger is not a simple 'peripheral' in terms of e....
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  • 3,775
6 votes
1 answer
404 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 ...
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0 votes
1 answer
90 views

Production programming: is there a practical size limit to serialization length? [closed]

This is a follow on question from the answers of these two: Is it practical for firmware to be uniquely identified in production How to verify hardware is legitimate I would like to be able to ...
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1 vote
2 answers
657 views

Why do PNP silicon transistors cost more to produce? NPN is cheaper?

I got a few suggestions/answers but nothing definite after searching and digging around awhile .. I am not so sure about any of these so correct any of them that you see Thanks Alex Van den ...
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2 votes
1 answer
107 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 ...
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  • 718
8 votes
3 answers
3k 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 ...
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  • 12.1k
1 vote
3 answers
851 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 ...
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  • 774
2 votes
1 answer
2k 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 ...
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