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

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Propper Method of Powering Nokia 5110

I am considering getting some Nokia 5110's for use with my Arduino Nano board but am I a pickle because I can't tell the correct way to wire it. Some people say to power it with 3.3v and only 3.3v ...
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1answer
44 views

Unable to understand Verilog syntax

I found an example Verilog code as following: module test #(parameter p=1) (); localparam [1:0] lp = ~(p)'(1'b0); endmodule I'm unable to undestand the ...
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43 views

Is there any completely open source hardware that allows to make some computations and connect to the Internet? [on hold]

Is there any hardware which is completely open source (CPU, storage and all other hardware parts)? Also all BIOS and microcode and etc for that hardware should be completely open source and free of ...
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2answers
60 views

Are neuromorphic computers considered digital computers?

This might be a pretty simple question, but I am wondering if neuromorphic computers using non Von Neumann architectures such as the IBM TrueNorth chip are still considered digital computers. I have ...
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2answers
68 views

Single wire two-way serial communication - hardware configuration

I have several servos that can give feedback data that I want to read. The servos use special protocol so I need to use Rx/Tx pin on my Arduino Mega to communicate with them. The problem is that a ...
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4answers
97 views

8-bit per cell memory?

I'm a software development student, who want to improve its hardware knowledge. I'm reading Structured Computer Organization by Tanenbaum. In the chapter 2, the author says the following: "[...] ...
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1answer
65 views

How to start with replacing a hardware with FPGA/microcontroller? [closed]

I'm currently stuck with how to start with a project I took on. The project is that I emulate the results given by a program when connected to a hardware using the same program and a ...
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1answer
37 views

Camera on cellphones

Why resolutions when we recording video or taking a picture with our cellphone camera are different? Video recording resolution is always so smaller compared to our photo resolution. Is it hardware ...
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2answers
39 views

Best Hardware for Accurate Point Tracking System

Here is what I am trying to accomplish: In the middle of a room, I have a mechanism with a laser diode mounted on it that can be moved in all axis by a motorized pan/tilt head type device. This ...
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45 views

Hardware characteristics of on-chip SRAM instances

I am looking for details on the hardware characteristics of various microcontrollers. In particular, I want to answer some of the following questions w.r.t. the on-chip SRAM: What type of SRAM is ...
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1answer
135 views

A simple FIFO buffer in verilog

I have decided to implement a FIFO buffer in verilog (for fun). Here is my primary prototype you can say : It will consist of a register bank or memory. Each register will be of size N and there ...
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1answer
85 views

Where can I find correct documentation of old floppy drive formats?

I have an old drum machine with an ancient proprietary 3.5" SONY floppy disk drive with no information on the device itself that I have seen. The performance is spotty and it's very picky about disks. ...
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46 views

Help Designing Microcontroller 2xRj45 (RS232) + 1USB-Serial

I am trying to design a microcontroller that will have 2xRS-232 RJ45 ports (not PoE, just serial communication) and a 1xUSB Type B female (for 5V power and programming). I am not exactly sure, but ...
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3answers
139 views

Computer peripherals to immediately (<5ms) detect digital input state change in C# programs

The C# application I'm working on needs to be able to be able to call a function within 5 milliseconds of a digital input signal's state change (0V = off, 5V = on). Rather than using software to ...
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1answer
38 views

Sound Box - Custom Message

I am trying to put a custom message on a "sound box" in a stuffed animal. I asked this at the Reverse Engineering SE and they pointed me here. Here is a picture of the circuit board: The blue wires ...
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1answer
65 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 ...
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2answers
47 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 ...
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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 ...
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2answers
86 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 ...
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48 views

Aircom air connectors, what are they called?

Does anyone know what type of connector this is?
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51 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 ...
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2answers
745 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 ...
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1answer
346 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.
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1answer
90 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
121 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.
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221 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 ...
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134 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. ...
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81 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 ...
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4answers
70 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 ...
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1answer
168 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 ...
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1answer
85 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 ...
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1answer
102 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 ...
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62 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 ...
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38 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 ...
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2answers
110 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 ...
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1answer
233 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 ...
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0answers
98 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 ...
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2answers
162 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
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1answer
175 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. ...
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1answer
80 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 ...
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0answers
38 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. ...
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1answer
65 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
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2answers
87 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
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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) ...
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2answers
58 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
151 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
100 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 = ...
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1answer
68 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. ...
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2answers
445 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. ...
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133 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 ...