An integrated circuit (IC) is an electronic circuit built onto a single plate of a semiconductor material, normally silicon. Modern ICs may contain billions of transistors and they have played a major part in the miniaturization and performance improvements of modern electronic systems.
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49 views
How to connect ASD bios chip
In my little box full of various electronic components I've found an AMIBIOS chip from 1995. The actual chip data are the following:
Vendor: ASD
Number: AE29F2008-12
Another number: 9846
I want to ...
-1
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0answers
43 views
locating broken ICs on board [closed]
A friend of mine got his hands on an old "hook a teddybear" machine. The problem is, the hook wont go down.
I assume that maybe some of the components on the board is broken.
How do I locate the ...
0
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1answer
54 views
Simple circuit to give a pulse to a IC pin once?
I have an IC that is activated when pulsing a pin high, the pin should be keep floating after the pulse. The circuit is powered using a battery, and that IC then wake up everything else (Regulator, ...
0
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1answer
51 views
How do I choose which version of the IC MT8870 should I use?
I am following this guide to hooking up a phone to a circuit, depending on the DTMF tones. However, when I went to buy one, I realized there were lots of different "editions"/models.
Which one should ...
1
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1answer
60 views
Soldering IC directly to stripboard
I picked up my first "from-scratch" DIY electronics project in a long time, building a 2-tone door bell on stripboard with a basic 555 circuit.
For the most part everything went well. I assembled the ...
-7
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0answers
44 views
design a bridge of magnetic switch using usb drive [closed]
I want to built a bridge of 4 magnetic switches by using usb drive .
It should have 4 switches for selecting 4 different things, but i need to use usb for recognizing which one is selected , so that ...
2
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4answers
96 views
Widely available IC for encording and Decoding DTMF data
I am planning to do some research in data transmission over the air. For this I am interested in DTMF encoding and decoding.
Is there a widely available IC to achieve this? A circuit diagram using ...
6
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3answers
102 views
How is “Overtemperature shutdown/protection” implemented for ICs?
IC data sheets often give some informations about the circuits over-temperature protection. Lets take a Microchip LDO (MCP1702) for example:
"...If the power dissipation within the LDO is excessive, ...
5
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2answers
65 views
Can I control a 12V motor from arduino using an H-bridge?
I want to control my 12 volt geared DC motor from my Arduino Uno. I want it to be able to rotate both directions as I'm intending to use it for a robot.
Can I use the L293NE H-bridge in this case? ...
1
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2answers
63 views
IC buffer like 4066 with 8 or 16 switches
I have a computer and two monitors. I want to build a device so that I can switch between to monitors. I would use buffers (like 4066) and a microcontroller. Is there any buffer like 4066 with 16 or 8 ...
4
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2answers
91 views
How is lithography actually used to “print” transistors?
In one of my classes, we skimmed over lithography, but mostly the optics side of things (the diffraction limit, liquid immersion to increase angle of incidence, etc).
One point that was never ...
18
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4answers
1k views
Why would a modern digital clock rely on mains frequency?
I am in the military, stationed in Djibouti, Africa. We generate 240V/50Hz power on base, but some buildings also have 120V outlets, which I assume is transformed somewhere else on base, probably at ...
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0answers
45 views
What is the trend of electrontic master degree in coming future? [closed]
i would like to study a electronic master degree
and find IC design has analog design,
why analog design?
if quantum computer appear, will CMOS outdate in future? will a new circuit manufacturing ...
5
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0answers
100 views
How does multi-core CPU implement asynchronous coordination?
I am coming from computer science background and wanting to study process calculus for use in asynchronous circuit design.
So, I am looking around the current practice on asynchronous circuits.
There ...
3
votes
2answers
115 views
Why N-channel MOSFETs are better than P-channel MOSFETs?
Besides the reason that electron mobility is higher than hole mobility, what are the other reasons of preferring an N-channel over a P-channel MOSFET?
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2answers
106 views
How do you make a shift/scale circuit using a transistor, resistors and a voltage source?
Given a resistive element that fluctuates between 0 and 10kOhms, a PNP transistor, a 20V source and a bunch of resistors, is it possible to construct a circuit with an output voltage as follows:
1) ...
6
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1answer
141 views
Solution for detecting a magnetic field
I have an Arduino based circuit that performs a mechanical job and I'd like the circuit to turn on when it detects a magnetic field. I want to use a magnet as a trigger for the circuit. When a magnet ...
-1
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0answers
35 views
how to read digital output after demodulation? [closed]
i'm new to electronics
i have developed a IR receiver device using TSOP1738 ic
as a output i have attached a led when IR signal is passes then led fluctuate
As seen the data-sheet of TSOP1738 we ...
4
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2answers
108 views
How are BGA dies constructed?
Are the dies made for a BGA package any different from the dies for a QFN or a DIP Package? Do BGA dies have connections on the lower side of the die? In the substrate?
How are terminals put in the ...
12
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2answers
397 views
How did handheld video games from the 70's and 80's work?
I'm curious about how the early handheld video games from the 70's and 80's worked. You know, those small games with a LCD display with "fixed elements" meaning it was hard wired for one (or a small ...
1
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4answers
102 views
What is important in computer clocks' signal: signal edges or intervals when signal is stable? Will multiple value propagation occur?
I am trying to figure out some basics of digital electronics. We have all seen the squared graph of the computer clock signal:
I have read multiple articles on the Internet and still can't figure ...
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1answer
98 views
Multiplex two I2C ICs into four 7 Segment displays
I currently have two PCF8574AN I2C ICs. Is there a way I could have two seven segments be driven off one IC (So i could run four seven segments displays off the two ICs that I have). I have thought ...
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1answer
84 views
How could I efficiently implement this “TTL load”?
I'm attempting to test a parameter of an IC to the specifications listed in the data sheet. The data sheet describes the following load circuitry for the output:
The data sheet notes that CL be ...
0
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3answers
157 views
Inexpensive programmable RGB LED driver/IC/solution?
My desire is to have a simple setup with a dial device (ideal would be a 3 click dial with 3 distinct settings but an analog dial would also be appropriate) whereby position 1 would display a color ...
2
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2answers
62 views
CD74HC125E, resistor or not resistor?
I have here an interesting piece of hardware, a CD74HC125E that someone gave me. This chip (can I call this an IC ?) is able to set its outputs to high voltage, low voltage or high impedance.
Do I ...
0
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0answers
54 views
What are the minimal hardware parts needed for an active GPS tracker?
I am considering to implement an active GPS tracking device that is completely independent, the tracking device should get it's location every few seconds and send that data to a server over some ...
16
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6answers
1k views
How are integrated circuits fabricated?
How are integrated circuits (e.g. a microprocessor) fabricated from start to finish? For example, there must be some wiring with resistors, capacitors to store energy (bits) in a field, transistors, ...
2
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1answer
54 views
connecting IC with external components
i want to understand the thought process and ideas behind these:
see the schematic
http://www.pololu.com/catalog/product/2124
1 - what is the n-FET and diode (Q1 and Q2) component means?
2 - why ...
4
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3answers
74 views
Creating a Sequenced Array of 3 Mosfets with Adjustable Timings
I am comfortable with rudimentary 555 circuits and other basics, but I have something a little bit beyond me now.
I need to have three separate mosfets A, B, and C all turn on and off in sequence. I ...
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4answers
135 views
If-else decision structure using op amps or any other non-programmable electronic device
The title is pretty clear, I would like to know if there is any circuit or an IC capable of dealing with signals to perform algorithmic sort of decisions, I mean, as you can solve differential ...
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1answer
89 views
Why cost of integrated circuits (IC) are higher when purchase online than to local market [closed]
Why cost of integrated circuits are higher when purchase online than to local market.
For example SN7404N on Digi-Key costs around $2 but same i got from local market in $0.2
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1answer
66 views
Help finding Buck/Boost Regulator IC
I have been trying to find a suitable Buck/Boost IC with certain features, but having gone through multiple Manufacturer's product tables, I can't find one that meets my needs. I think this is more ...
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0answers
41 views
Smart card dump reader
I have a smart card that I need to dump but I don't know if it's possible. I guess it has a SLE4404 chip. Could somebody give me some information? Links or something because I've been searching the ...
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1answer
140 views
Will an IC that requires an Oscillator work without one?
I have a PL2303HX and I just etched my board with a USB to Serial IC (PL2303HX). The problem is that it requires a 12 MHZ crystal but I don't currently have.
Just a side note, the IC is on the same ...
1
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1answer
144 views
What IC should I use to make a binary clock?
I am wanting to make a binary clock. A lot of the schematics I've found are for Arduinos or Raspberry Pi. As much as I appreciate the use of minicontrollers, I don't want to do that for this ...
4
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2answers
281 views
Simple vending machine circuit
As a homework assignment, I was given to design a simple vending machine circuit as follows
Receives 5 cent, and 10 cent one at at time.
20 cent per snack, gives change when necessary (IE, 25 cents, ...
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1answer
64 views
Can you use a 5 input NAND gate as a 4 input one?
I have a circuit that has 4 inputs and am only allowed to use 5-, 3- and 2-input NAND gates. Yes this is an assignment question but I have already solved the design of the circuit.
I just don't ...
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1answer
37 views
TLC59116 (Y59116) maximum output current
I bought this IC (http://www.ti.com/lit/ds/symlink/tlc59116.pdf) to power a few RGB leds. I was under the impression that it could drive up to 100ma per channel, constant current. However in practice ...
0
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3answers
202 views
Improving absolute precision of ADC to balance battery voltage
I plan to use a relatively high-end microcontroller (Piccolo TMS320F28035, 12-bit resolution, +/- 4LSB offset, +/- 60 LSB gain) to measure voltage across stacked battery cells and control associated ...
2
votes
1answer
132 views
Control multiple LEDs using an IC and PC/Linux thru USB
I've already tried to search this topic but all Google results said that this isn't possible. Is there any chance of controlling multiple LEDs using a PC/Linux, through USB? The diagram might look ...
2
votes
2answers
79 views
Measuring the current of a DC circuit
I'm creating a set of modules that can be daisy chained and hooked up to a master controller unit. I'd like to have a display on the master that shows the combined current draw of the modules in ...
1
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3answers
303 views
How do I control a two 12VDC 10A motors using an Arduino?
I am new to arduino and electronics in general but I need some help on a project I am working on. Essentially I want to be able to control the state (on/off) and direction of two linear actuators that ...
3
votes
2answers
189 views
Breakout Board for 1.27 mm to 2.54 mm
Is there any breakout board like this for 1.27 mm to 2.54 mm pitch?
Example for 1.27 mm:
Example for 2.54 mm:
I also appreciate any hint how to perform this conversion on any other cheap way.
...
4
votes
4answers
270 views
Is current the same coming out of an IC as it was going in?
This is my first diagram so keep that in mind. I've come up with this circuit because
I've got some 74** series ICs and I want to be able to make them work. This example is
a simple AND gate with ...
2
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2answers
176 views
What can I do as a student to be a better candidate for a hardware design job? [closed]
If you were looking to hire a student still in school for an internship position at a high-tech company (say, Microsoft, Apple, or Google) for hardware design. What kind of skills would you be looking ...
3
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1answer
127 views
List of LM Integrated Circuits?
Does anyone have / know of a list of all the LM integrated circuit packages available? The EE stockroom at my university recently reorganized and they cataloged several pages of part numbers without ...
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2answers
90 views
is my AND logic gate broken? HD74LS08P
when i turn on the circuit, the AND (74LS08) gate keeps sending signal to the 4 outputs, even without signal from the inputs. I may have broken it because i applied 7,5 volts before correcting the ...
3
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2answers
154 views
Identify an IC Found in a Garage Door Opener
Inside a defunct garage door opener I found this IC:
I tried searching for 33192C with variations of 'datasheet' and such keywords, but I got routed to the usual datasheet farms who are happy to ...
9
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1answer
149 views
Max operating temp of IC's
Why do so many IC's have a max temp range of 125C? Is it due to packaging material tolerances, ie the black plastic enclosures and/or the bonding epoxy that holds the die to the package and/or ...
0
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1answer
121 views
What is this IC marked IA89G or 1A89G?
Please I need a bit of your help. Do you know what IC is this marked IA89G or 1A89G perhaps? I've tried Googling but to no avail. I'm really wondering why this is such a hard nut to crack.
Here are a ...
