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JLPCB Design Rules for Altium CircuitMaker

What is the right design rules from JLCPCB? When I look at the electrical clearance from JLCPCB, I find: Via to Via (Same net labels): 0.254mm Hole to hole (Different net labels): 0.5mm Pad to pad (...
euraad's user avatar
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1 vote
1 answer
61 views

Gerber files sequence [closed]

I have the following Gerber files from the manufacturer for order confirmation. As I inspected them, I have inferred that the order of the copper layers from top to bottom are tl, l3, l2 and bl. But ...
Semih's user avatar
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1 answer
80 views

Sensor types in bread production

What is the name of these two sensors and what function do they perform?
Ahmed Ramadan's user avatar
0 votes
2 answers
141 views

Use-Cases for a "Silicon Serial Number" IC

I recently came across this Silicon Serial Number IC. Now, I understand the purpose and usefulness of serial numbers in products. However, I don't understand why one would not simply place a serial ...
ElectronicsStudent's user avatar
3 votes
1 answer
88 views

What would be a good way to program an MCU in a mid sized (few hundred) batch?

I'm looking to have a few hundred boards made and they all have an MCU on them, that will need programming. With large scale production, it seems the way to go is usually programming the IC/MCU before ...
Gorbit99's user avatar
4 votes
4 answers
1k views

Development board's charging unit in a custom PCB production

This question would be more appropriate for a lawyer, but maybe some of you from product manufacturing departments already know the answer. Development boards like Adafruit HUZZAH32 ESP32 have an ...
Domenico's user avatar
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2 votes
0 answers
102 views

How old is too old for BGA chips soldering

I need to buy a batch of UFGBA100 STM32 MCUs from a Chinese broker. I'm concerned that in the quote they specified that the chips will have a date code 19+ (4 years old). How can this affect ...
mactro's user avatar
  • 497
1 vote
1 answer
63 views

How to add 2 or 3 parallel Li-ion cells to my custom PCB

I've tinkered with electronics and components for quite some time now, but I'm kind of a noob when it comes to taking things to "production". I've this project using an ESP12-E, powered by 2 ...
webnator's user avatar
1 vote
1 answer
81 views

What kind of displays and processors are used in consumer electronic products (like a coffee machine)? [closed]

I am presently working on the development of a smart kitchen appliance, which will eventually be sold in the market. As part of this project, I need to incorporate a touch display for the operation of ...
santosh kumar's user avatar
33 votes
7 answers
22k views

How to ramp up a factory consuming a lot of energy?

Can you please explain how to manage the process of ramping up a factory with a big electric consumption? I am wondering how it is possible to balance the grid during the start up phase of a big power ...
Merlin Nestler's user avatar
0 votes
0 answers
78 views

Is this a functional and reliable Reverse polarity protection?

Guys, I am trying here to design a UPS controlling board, I designed this circuit and it was to some extent functional and it draws approximately 16mA - 20mA (I don't want to use the traditional one ...
Hazardous Voltage's user avatar
1 vote
1 answer
67 views

Best LCD for mass production

I'm designing a PCB that will be manufactured in small batches (a few hundreds). It will have a segment LCD with electronic components under it. I cannot choose between two form factors - with SMD ...
Archimedes's user avatar
5 votes
2 answers
659 views

Do EMC test houses typically accept copper foil in EUT?

Working with small volume product and tight schedule it might become an option to pass EMI limits by use of copper/aluminium foil on inside of enclosure. What is your experience with the labs on this ...
NoobPointerException's user avatar
0 votes
0 answers
312 views

What attenuator to use for using HackRF one to simulate GPS for in production testing?

I am trying to use the HackRF One to simulate GPS to test devices in a production environment. I am currently able to get the GPS signal on my GPS receiver that I am testing, but the signal is much ...
mgwalker95's user avatar
2 votes
1 answer
151 views

Include UUIDs in embedded firmware image

I do have firmware for an embedded device, which has several UUIDs in flash. The UUIDs have to change for every controller flashed in production. There is no EEProm available - only flash. I'm ...
ElectronicsStudent's user avatar
0 votes
1 answer
104 views

Washing of an IC

Can someone tell me what is the information regarding the process of washing the device during production? This question is with respect to the Microchip LAN8741A
user avatar
1 vote
1 answer
57 views

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 ...
Oscar's user avatar
  • 91
3 votes
1 answer
126 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 ...
cm64's user avatar
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0 votes
1 answer
189 views

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 ...
mannen's user avatar
  • 29
2 votes
2 answers
443 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/...
FrancoVS's user avatar
  • 1,563
0 votes
1 answer
115 views

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 ...
The Pointer's user avatar
  • 1,281
0 votes
2 answers
109 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 ...
gino's user avatar
  • 499
7 votes
3 answers
2k 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 !...
Jess's user avatar
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0 votes
1 answer
125 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/...
Bryan A.'s user avatar
10 votes
2 answers
6k 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 ...
M Y's user avatar
  • 239
0 votes
1 answer
67 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 ...
Pholotic's user avatar
0 votes
1 answer
52 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 ...
Pholotic's user avatar
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 ...
ceremcem's user avatar
  • 1,426
2 votes
1 answer
163 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 ...
Ross's user avatar
  • 570
0 votes
1 answer
156 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 ...
hotmeatballsoup's user avatar
0 votes
4 answers
601 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?
user233061's user avatar
0 votes
0 answers
91 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 ...
JohnDonut's user avatar
  • 115
1 vote
1 answer
440 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 ...
norlesh's user avatar
  • 483
17 votes
6 answers
4k 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 ...
Daniel Vela Jarquín's user avatar
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 ...
luisgepeto's user avatar
1 vote
0 answers
136 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 ...
felixlkunz's user avatar
0 votes
1 answer
200 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 ...
shafeeq's user avatar
  • 172
1 vote
1 answer
240 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. ...
QuantumElectro's user avatar
2 votes
2 answers
3k 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 ...
jerrytrey's user avatar
0 votes
0 answers
927 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 ...
Alexander's user avatar
1 vote
2 answers
609 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 ...
Bruce_wayne's user avatar
0 votes
1 answer
319 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 ...
jusaca's user avatar
  • 9,619
10 votes
4 answers
1k 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 ...
jusaca's user avatar
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1 vote
2 answers
64 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 ...
SimonPCB's user avatar
0 votes
1 answer
183 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 ...
winny's user avatar
  • 15.7k
9 votes
1 answer
2k 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 ...
winny's user avatar
  • 15.7k
0 votes
1 answer
72 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 ...
lujop's user avatar
  • 101
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 ...
Fed Nlanders's user avatar
0 votes
1 answer
209 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 ...
Alex's user avatar
  • 103
1 vote
1 answer
138 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 ...
user avatar