Questions tagged [cost]

The tag has no usage guidance.

13
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3answers
2k views

IC on Digikey is 5x more expensive than board containing same IC on Alibaba: How? [closed]

I built a prototype using an NFC board I bought from Alibaba for 1$ (https://www.alibaba.com/showroom/rfid-rc522.html). It claims to use the NXP MFRC522 IC, and if I look on the board the chip has ...
2
votes
1answer
81 views

Help with producing a circuit that costs 17, then 9

I'm am completely stuck on this question: We want to design a circuit that determines if a four-bit number is less than 10 and is also even. a. (10 points) Write an expression of M such that M=1 if ...
1
vote
0answers
47 views

How do I start calculating a MEMS productions costs

I have a MEMS design and I've understood that producing a prototype in a fab will cost around 500K Euro. I am trying to estimate the cost of making 1 wafer in production but I'm not sure what to look ...
4
votes
1answer
129 views

Designing for Low Cost China Manufacturing [closed]

I have designed a few boards on a consulting basis. Some of them have been manufactured in China in +10k unit volumes. One of the complains I have gotten from my clients is my boards can be a bit ...
1
vote
0answers
44 views

How to consider lifecycle in PV power smoothing?

I am planning to size Battery for Solar PV system by smoothing the PV output. Capacity size can be obtained by looking at Max charge/discharge needed to smooth the fluctuation. This should make able ...
4
votes
3answers
391 views

Cost optimization - PCB Area vs. Double-sided load

If one has an opportunity to choose between laying out a PCB as either a single-side load (components all on one side, so it goes through reflow only once and requires only one stencil) or a double-...
0
votes
1answer
100 views

Most cost effective way to power a bunch op amps +/-12V supply rails from +5V

I'm searching for the most cost effective way to supply +/-12V for 12 TL084 op amps. Reading in the datasheet, it seems they have a typical current output (with load) of about 20mA. So, 12 * 20 = ...
11
votes
3answers
728 views

low noise, low distortion analog multiplexing

I'm trying to design a low noise, low distortion, low cost op-amp circuit for multiplexing analog (audio) signals. Experience, research and some experimenting already led me to the following ...
1
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1answer
378 views

Trying to Get the Most Cooling Power out of TEC Peltier Element: Smaller or Larger Peltier?

I am trying to achieve the strongest cooling effect using a TEC Peltier element. Currently, my set up is two small, 20mm x 20mm peltier TES1-4902 run with a 5V 2.4A USB Battery Pack per peltier. I ...
0
votes
3answers
536 views

Why not produce household electricity with natural gas generator?

I don't have an engineering background so I apologize in advance if this seems like a silly question. So I noticed natural gas in my area is a lot cheaper than electoeocty. So I was asking myself ...
-5
votes
1answer
311 views

Why is so expensive to fabricate custom IC [duplicate]

I had read that the fabricate a custom IC is very expensive (>10000$) but why? For example an 555 timer cost <1$. If I design and 555 timer with an inverter at the output in some program (don't ...
1
vote
2answers
525 views

Shared support chips and tooling between 16 and 32-bit computers

Can a production line for a 16-bit computer save significantly on unit cost by sharing support chips and tooling with another 16-bit computer, to a greater extent than if it went 32-bit? To be ...
0
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5answers
121 views

How can I calculate how much my desktop PC costs to run for an hour?

I was torn on whether to post this to here or Math.SE, so feel free to move it as appropriate. I recently got hold of a power usage monitor in order to calculate how much my PC costs to run a given ...
19
votes
3answers
4k views

Is 0603 vs 0402 assembly mass production cost optimization still relevant?

Historically, choosing a design avoiding 0402 and finer pitch components was advantageous for mass production cost savings. The yields were improved and accuracy requirements for pick and place ...
1
vote
2answers
406 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 ...
0
votes
1answer
68 views

Cost of expandable memory [closed]

Given two computers: Has X gigabytes of RAM, that's the amount it ships with and that's all it will ever have, it can be designed around that number in whatever way is most efficient, solder chips ...
1
vote
2answers
334 views

Cost effect of different component packages during PCB assembly

We are looking at starting PCB design in house, up until now we have outsource design and manufacture. This means that we have yet to see the real cost of the PCB, components and assembly as discrete ...
0
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2answers
440 views

Which communication system would you choose for the elevator? [closed]

The communication system is used to connect the floor fixtures (e.g. elevator diplays, elevator call butons) to the control panel which is existed in the elevator machine room. Please look at the ...
0
votes
1answer
155 views

Cost of a partial barrel shifter

As I understand it, a 32-bit barrel shifter takes about five thousand transistors. Suppose you built a shifter that is like a barrel shifter in providing an answer instantly without iteration, but ...
-5
votes
1answer
132 views

Whats the difference between an FPGA and an ASIC [closed]

I know what an FPGA and ASIC are. However what I want to know is what is the difference with cost and time. How long does it take to build an FPGA? How long does it take to build an ASIC? How much ...
1
vote
1answer
622 views

Building your own camera module [closed]

I would like to know how difficult it is to build your own camera module. For instance, how difficult would it be to assemble the Raspberry Pi camera module from scratch? The reason I'm interested ...
2
votes
1answer
453 views

Cheap alternative to an accelerometer [closed]

I am designing a very simple device, which absolutely needs to be inexpensive, total BOM cost < $1.00 including the MCU (at 10k+ units). This device would benefit from knowing its orientation, ...
0
votes
1answer
385 views

power consumption of a switch [closed]

I was wondering what is the power consumption of opening and closing a switch. I mean when you put two conductives plates together for closing a circuit and then you take away the two plates for ...
2
votes
1answer
220 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 ...
1
vote
2answers
408 views

Estimated cost savings by going from a 2 layer to a single layer pcb?

I've been tasked with minimizing cost of an existing design by taking it from a 2 layer board to a single layer board. I've never made a single layer board so I am unfamiliar with pricing. I tried ...
0
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2answers
64 views

Low domestic voltage inefficiency cost

Since lower voltage means proportionally higher current for a given power, and higher current means more impedance, presumably having a lower voltage at the outlet means transmission power losses are ...
0
votes
4answers
154 views

Where to go with an idea for a chip? [closed]

I tinker with AVR, 6502 and z80 designs, just muck around really, nothing overly serious. But as a result I had a thought of an idea for a new chip. Specifically a SoC built around a z80 core. But ...
1
vote
1answer
93 views

What's the cheapest type of package to assemble?

Say you have a microcontroller that you want to use on a production board. Most microcontrollers come in several different packages. Assuming all the packages cost the same, what typically would be ...
0
votes
2answers
150 views

PCB Assembly Costing Help - Software tools out there? [closed]

Are there software solutions out there that help provide a cost estimate for PCB assembly? I have a BOM and want to generate a cost estimate to help me negotiate with my suppliers better. I also ...
3
votes
4answers
2k views

Why DRAM costs much more than flash memory?

Comparing prices at a local store, I calculated prices 0.36 USD/GB for SSD NAND flash memory and 5.41 USD/GB for DRAM memory. The difference is 15 times. Why so big difference? Both are semiconductor ...
-2
votes
2answers
447 views

How would I get a logic circuit printed on an IC? [duplicate]

Say I have designed a logic circuit. If I were to construct it, due to the cost of individual components as IC's, it would be very expensive (and tedious). Is there a way that I can get my circuit ...
5
votes
2answers
1k views

Why are PCB-mount AC DC converters so expensive? [closed]

In a thrown-together prototype, I used a few wall warts to get the various voltages I needed. Now, I'm trying to build a cleaner version with a single plug and put it all on a PCB to eliminate my rats ...
3
votes
3answers
4k views

Why is the cost of microcontroller lesser than microprocessor

I was learning today about 8051 and I encountered a point which said microntroller generally costs less than a microprocessor. I didn't understood why is it so since microcontrollers have RAM, ROM, ...
0
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2answers
777 views

Use expensive or inexpensive capacitor for decoupling

I'm in the middle of a project to create a small development board using a 100Mhz Cortex M4 MCU and have to buy some decoupling SMT capacitors. I've found the following options: Cheap 10 cent from ...
9
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6answers
1k views

What is the place of 8- and 16-bit microcontrollers? Why hasn't 32-bit taken over?

What is the real cutoff point in terms of the trade-off between cost and performance for selecting 32-bit microcontrollers? In other words, with the rise and domination of ARM architectures, why are ...
2
votes
1answer
1k views

PCB assembly cost per-board

I know this question might get closed because of being opinion depended but I couldn't find any answer from google or any other search, so I decided to ask it here. For clarity of question I want to ...
7
votes
2answers
2k views

Single- vs double-sided PCB assembly costs

I'm working on a new design (still laying out the components) and I have a chance here to reduce the size of the PCB by roughly 40%-50% if I use the other side for a QFP-100 IC (so it's heavy and will ...
18
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5answers
1k views

Why are MAX-, AD-, LT- parts (among others) so expensive?

I'm curious why some IC manufacturers like Maxim, Analog Devices, and Linear Tech's parts are so expensive? I know they are much higher quality (better electrical characteristics, etc), but for some ...
0
votes
1answer
415 views

How to (cheaply) measure power usage of a 250V socket [closed]

My air conditioner runs off a socket providing 250V, 15A. I'd like to figure out how much power it's using in a cheap way, so I can budget how long to run it. Ideally, I'd be able to plug in ...
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 ...
3
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2answers
868 views

What are the construction differences between a 1% transformer and a 5% transformer?

I'm told that a 1% transformer costs more than a 5% transformer of the same power rating. I understand that the 5% transformer has higher output impedance, which seems to imply more windings and ...
0
votes
1answer
146 views

Calculating specs of the Li-Ion battery depending on Robot's weight

I want to build a moving wireless robot. Vehicle needs to have a speed of 50 kms/hr and needs to have a tracks instead of wheels. The approximate weight (without the batteries) might range between 20 -...
5
votes
5answers
922 views

A Bare Bones Internet Connected Microcontroller < $10?

These days businesses are all talking about the Internet of Things and how Cisco predicts 25 billion devices will be connected by 2015. All around the hobbyist community various internet shields and ...
1
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1answer
432 views

How much do people charge for EE R&D work? [closed]

My software startup is considering a project for a client that has a significant hardware component: a custom device with GSM, GPS and CAN connectivity for use inside a vehicle. We'll design the board ...
8
votes
2answers
3k views

Pros and cons of using resistor networks over individual resistors?

I've been looking over some board designs and have been trying to identify the reasons behind using resistor networks over individual resistors. Some guesses I can think of are a reduced part-count ...
8
votes
3answers
816 views

Pull Switches - why so expensive

I would like to use a pull switch as a trigger for an alarm that I'm building. When the switch is triggered it will turn on a siren and potentially a strobe light. I've found plenty of options out ...
5
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3answers
3k views

PCB vias impact in cost

Often times I read comments/recommendations about placing lots of vias for GND in 4-layer designs, as well as a line-up of vias surrounding the board to protect from EMI, etc. I was always under the ...
-8
votes
1answer
161 views

Car Battery, storage, home reserve [closed]

Where I live there is a $.05per kilowatt differential in electricity costs called time of use. Everyday for at least 12 hours it is at its cheapest. From here I understand a car battery stores about ...
1
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3answers
2k views

Finding the right motor

I need a motor and I'm not sure what to be looking for. I know the power and torque I need (3 N*m @ 1200 rpm = 1/2 HP). Is finding a motor as simple as matching these two values? Edit: The motor will ...
1
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2answers
2k views

Where do I find a list of Arduino DIY shields [closed]

I am interested in Arduino shields for fun, so I do not have a specific need. To save money, I would like to build the shields myself. Is there somewhere I can see a list of the most common, simple ...