Computer hardware is the collection of physical elements that constitute a computer system

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1answer
35 views

How is the concurrency control in hardware?

How a multicore's processor hardware implements concurrency read and write to memory? Is there a special dispatcher, and links that indicate memory usage?
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1answer
61 views

What knowledge and equipment do I need to build this device?

OK I am a Software Engineer dealing with both low level and C/C++/Java code with a Masters in Software Engineering but no knowledge of Electronic Engineering whatsoever. I wish to build a device that ...
0
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2answers
45 views

Is hardware handshaking not available when using a USB to RS232 adapter?

As far as I understood there is two type of hand shaking. Hardware and software. For hardware handshaking other pins of RS232 connectors used. Does that mean of we us a USB converter we cannot ...
17
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3answers
2k views

What are the 'knuckles' on through-hole LEDs and photodiodes for?

I am using an IR LED and a photo diode, and I have designed the PCB according to the specifications that I found on the datasheet - i.e. hole sizes for the pins being 0.6 mm. However, on these ...
1
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2answers
64 views

Finding number of don't care conditions

I'm new to these forums and have very little background in electrical engineering. I'm trying to figure out the number of "don't care conditions" based on an input of two numbers, each 0-9, for ...
1
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0answers
42 views

Aircom air connectors, what are they called?

Does anyone know what type of connector this is?
0
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0answers
32 views

hardware cpu mod to enable qpi lanes on a intel xeon E5-1650

I read that some cpu's are crippled. from this article ( http://wccftech.com/intel-ivy-bridge-e-hedt-core-i-7-actual-six-core-xeon-die/ ) it seems that the quad core i7s are actualy six core xeons ...
0
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2answers
180 views

How to test if my program for SPI communication is working correctly?

I have developed a simple code for learning about SPI in Arduino Due. The code is compiling properly and now I would like to learn the next step on how to test the code with the board and get the ...
0
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1answer
108 views

Identifying a component on the circuit board of a mobile phone

I need to identify this component which I found on a circuit board inside a mobile phone.
0
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1answer
70 views

Hardware reference design for a phone [closed]

I want to make a simple box with one button. Pressing the button will send a SMS Text message to a preprogrammed phone number. I have not designed a phone hardware before so looking for some simple ...
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1answer
67 views

how to convert 1.5v 150ma to 5v 2 amp?

i want to convert 1.5 v 150 mamp to 5 v 2 amp. Is this possible ? if possible how to make circuit of this ? thanks.
5
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2answers
168 views

Is it worth it to go full stack as an embedded engineer? [closed]

In big companies, they tend to separate embedded engineers by disciplines such as firmware, hardware, interface software, and PCB layout. Still, I think it's more fun to work 'full stack' and build ...
3
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2answers
85 views

Is one accelerometer enough for detecting tilt/orientation of a rigid body?

I posted this question earlier in physics.stackexchange, but I think this is actually the best place for it. I’m not familiar with sensor hardware, and I don’t really know how an accelerometer works. ...
1
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0answers
79 views

What connector is this?

I need a cable for something I'm working on, but I don't want to just cut off the connector for the existing cable, can you help be identify the type of connector this is so I can buy a new connector ...
0
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1answer
78 views

Are all foams safe for storing hard drives?

I'm thinking about getting a Pelican 1300 case for storing hard drives (internal HDDs), but I need to know if it's safe. Will the foam allow static discharge to the HDDs, or other issues? Thanks.
1
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4answers
58 views

integer frequency division

I have an 800 Hz square wave and would like to generate other frequency square waves from it: (100, 200, 300, 400, 500, 600, 700) Hz. I'm aware of "divide by 2" frequency division, but how would you ...
1
vote
1answer
107 views

Why is the refresh rate of most LED LCD TVs 60Hz?

Can anyone explain to me why (at present day) the refresh rate of most LED LCD TVs is 60Hz? Is there a physical limitation to the technology of LED TVs that make it much more expensive to implement a ...
0
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1answer
74 views

Implementing Integer Division in hardware

I am trying to figure out how to create an efficient way to divide 5 bit numbers in hardware (using registers, Shift Registers, Comparators, Muxes, basic logic gates, bit shifters, bit extenders, and ...
0
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1answer
66 views

Power multiple 5V/12V devices off a single transformer? [duplicate]

I have these devices in my cabinet (Q-Panel) that have these power requirements: 21V 1.2Amp 5V 500mA 12V 1.5A 12V 1.5A 48V 1.25A Obviously I can't do much about #1 and #5. I want to be able to ...
0
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0answers
55 views

Hardware design methodology

I would like someone to explain the three domains in hardware design and the relation between each of them. And how is it used in Hardware design. I tried searching on the internet, but I find ...
0
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0answers
33 views

Need help finding hardware to convert voltage output to match the Input Specs of my IO Controller

I am a software engineer so be nice as I attempt to explain the problem. I have a thumb force controller that gives out a -5 to 5 range voltage to a device called a galil. Instead I need to send the ...
0
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2answers
97 views

What tasks does Graphics hardware perform and what steps does it follow to do so

I am not intending to go into high end GPUs here. That is too advanced. What tasks does a basic graphics hardward perform? By basic perhaps we can go back in time and see what it did in the early days ...
0
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1answer
139 views

How to interface with credit card terminals?

I am considering doing a project that involves a machine that can accept credit card payment automatically from customers. Think of it as a vending machine, that accept credit card. I want to ...
2
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0answers
73 views

Combine Bluetooth Buttons (Volume up / Next, Volume Down / Previous)

I have a question regarding the control of a bluetooth device, which I would like to connect to some old headphones. Bluetooth SMD Module - BC127 There are some pins on which I can connect the ...
1
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2answers
105 views

PS2 / SMBus communication

I have an OEM touchpad I want to connect to a PC. The drivers for this touchpad are widely available. I asked the manufacturer for the original datasheet, and it says there, that the touchpad ...
2
votes
1answer
154 views

Shift Register Vs Multiplexer

I am not sure about an implementation. I've a multiplexer 8 input, 1 output and 3 select signal. One of these selects signal sequentialy acquires all value of a bit vector. Now I can choose 2 way. ...
1
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1answer
75 views

Modeling languages for Hardware platforms (embedded systems) [closed]

I'm looking for some modeling languages in order to design hardware platforms in the context of embedded systems. I already had a look at the following: AUTOSAR UMLMarte SysML I wonder if there ...
1
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0answers
29 views

Sony Ex Data Acquisition Frontend

I am looking for information on a third party driver for the Sony EX-IF10 data acquisition frontend. I know sony made drivers for Matlab and Labview as it was advertised in promotional materials. ...
1
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1answer
59 views

Executing push $reg using one instruction on single cycle datapath

So I know how to push a register using two instructions, but how can I push a reg onto the stack using one instruction? Here's the single cycle datapath I'm seriously stuck here
1
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2answers
82 views

What would I call this specific type of knob?

I am looking for a particular type of spring-loaded knob, similar to the thumb wheel you would find on an old Blackberry - but I cannot seem to find an appropriate name to track one down. I'd like ...
4
votes
2answers
109 views

Secure signals on boot time to prevent unwanted operations

How can I be sure that at boot time my module won't get random values to it's control signals and write to an address* before I reset the module? *(or anything that shouldn't be done before reset) ...
0
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2answers
53 views

Given hardware specs: How do I calculate the data bandwidth [bits/s] of this system?

I'm currently trying to buy a hardware that is supposed to extract your brain waves. In other words, a data transmitter. I am looking at the hardware spec and I am uncertain as to how I should ...
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2answers
149 views

Why do Nintendo 3DS games have 17 pins? [closed]

I took a good, hard look at one of my Nintendo 3DS games today, and I realized that there are actually 17 pins on the game that connect with the console. Why? I was under the impression that ...
2
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1answer
97 views

What could this PLA be doing?

The picture below shows a PLA, I have done part (a) and found out that; $$ F_0 = A_0 \mathbin{\oplus} B_0 \\ F_1 = A_0B_0 + (\overline{A_0} + \overline{B_0})(A_1 \mathbin{\oplus} B_1) \\ F_2 = ...
0
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1answer
59 views

Serial Connection Not Working on Modified Router [closed]

I have a Sagem F@ST 2504 router. Following the advice from OpenWRT wiki (http://wiki.openwrt.org/toh/sagem/fast2404) I managed to solder the header pins in the correct place. I've attached pics below. ...
0
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2answers
366 views

Controlling AC mains using Arduino and removing control easily

I am planning to for an Arduino to read status of a switch, and accordingly switch on and off AC appliance, for a demo purpose. I want to add a feature to it of easy recovery to manual switch control. ...
0
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1answer
100 views

What determines the maximum rotational speed of a hard disk drive?

Through my background research I understand that the limit on the rotation of a hdd is largely the product of heat and the specs of the physical disk, but I am puzzled by the round numbers advertised ...
0
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1answer
207 views

tlc5947 LED driver without constantly occupying uC pins

I am working on TLC5947 chip to control 24 RGB Leds to create different patterns with them. My concern is, I have to keep giving command to SIN, SCLK, XLAT pin of microcontroller every loop to keep my ...
0
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2answers
118 views

Online arithmetic with radix 2 addition

I am having trouble working with OLA(online arithmetic addition) radix 2 SD(signed digit) addition MSDF(most significant digit first). If I have an 8 bits range unsigned number and a redundant and ...
0
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3answers
79 views

What type of motor is this?

So I recently bought a motorised pedicure set thinking it would be some amazing thing. However, I used it once and the batteries (4 AA) died after about half an hour and not before getting ...
0
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0answers
79 views

Marsboard A20 camera module

Is it possible to use this camera module (or any other same camera module, preferably PAL) with new MarsBoard A20? According to specs, it has only CIF camera headers and some other EXT headers. So ...
1
vote
1answer
155 views

counter that MSB toggles every 2 seconds [duplicate]

I want a counter that the Most significant bit toggles every 2 seconds, and gets values 0 and 1.So for example it will have 0 for 2 seconds and after 1 for another 2 seconds etc.. I need it like that ...
-2
votes
1answer
123 views

rescale a binary number [closed]

How I can decode a 6 bit binary number(up to 32 in decimal) to a 7 bit binary number(up to 100)? I want to change scale from 32 to 100 scale. I am using VHDL-93. For example if the binary number is ...
0
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2answers
157 views

Why isn't homemade hardware a thing [duplicate]

What prevents someone with some funding from creating and selling their own hardware? Let's ignore the legal side of things and assume the only limit is technology. Could someone create something ...
0
votes
1answer
73 views

Addressing the cylinders of a Hard Drive

I want to address the cylinders of a Hard Drive but I can't find a good manual of the pinout of the IDE interface. Anyone knows how to do that? I don't want to read/write anything in the disk, just ...
0
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1answer
111 views

Controlling a bank of relays

I have a project that requires me to control a set of relays (up-to 24 of them). The current setup is using Wago Speedway 767 field-bus modules. I'm just ramping up so I have to either figure out how ...
1
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1answer
570 views

What are these hardware components, and how do I control them?

My father received a video card in the mail last week. He gave it to me and I dismantled the card to get to just the video player and other components. The labels here are based on my experience ...
0
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2answers
90 views

In logic levels, why are both the driver and receiver needed?

Here is what my textbook has to say about logic levels: The mapping of a continuous variable onto a discrete binary variable is done by defining logic levels. [...] The first gate is called the ...
0
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0answers
72 views

Are there any registers that are read_clear in PC devices?

As we know, in x86 PC devices, there are some kinds of registers that are write_clear, that is, if we write "1" to the register, the register will be cleared. So I want to know if there are any ...
3
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2answers
948 views

How does DDR SDRAM work?

The figure is about how DDR SDRAM and DDR SDRAM2 works. After taking some time searching, I still cannot understand the figure. Can anyone please help me understand it? In this case, is the ...