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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Transmitting voltage signal through wireless

simulate this circuit – Schematic created using CircuitLab I am currently a senior EE undergrad working on a project for work and I am not versed in wireless communications at all from my ...
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2answers
122 views

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

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 ...
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1answer
23 views

Buck-Boost converter controller design

I am trying to design a four mode buck boost converter based on the LTC3789 controller such that I want to completely substitute all the PLL functions, clock and everything else internal to it so ...
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2answers
31 views

What does it mean by “storage clock” of a shift register?

I read the data sheet of a shift register and I saw some tutorials on the internet. I can use all pins of my new shift register except pin 12. because I still don't understand what is the meaning of ...
3
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1answer
144 views

US Government Export Approval for TI chip

I hope this isn't off-topic since I think it's a general issue that applies to many ICs. I'm looking into buying a TI battery charger chip, but the datasheet alone seems to be restricted by the "U.S. ...
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1answer
42 views

Removeable board sized ssd

Me and my friends are starting work on a small robotics product. We are just starting out in product creation, and were wondering how to transfer our programming to the bot's ssd. We realize we can ...
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2answers
44 views

Separating power ground from control ground

I'm looking at the 'layout considerations' for TPS61030. On p.18, it says Use a common ground node for power ground and a different one for control ground to minimise the effects of ground ...
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1answer
52 views

What is the name for an IC that accepts an analog voltage and outputs a proportional PWM signal?

I want to isolate an analog signal. One way of doing this is to convert the analog signal to PWM, isolate the pulses with an optoisolator, and filter the PWM on the other side. Obviously I could do ...
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0answers
34 views

How can I measure RPM without interrupts (or a secondary I/C)?

I have an arduino project that is precisely controlling the ignition of a sparkplug in my exhaust to shoot flames (Flameduino). I'm using the arduino's microcontroller to very precisely control ...
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0answers
30 views

internal circuitry of LM1596/1496 perform modulation

The following is the inner circuitry of LM1596 which is a modulator and a demodulator: I wanted to get an abstract idea as to how this circuit actually works and performs de/modulation... I have a ...
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2answers
149 views

I have a hardware theory as to why computers crash?

I have an idea as to why a computer might crash for no reason at all. As you know in a computer information is represented as on or off. On simply means high voltage and off means low voltage.Now lets ...
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0answers
55 views

ICL7667 becomes extreamly hot [closed]

I am using ICL7667 to drive a power MOSFET [IRFZ44N]. The IC I am using becomes too hot although, the unconnected pins are grounded. I would like to mention that so far I am not using any bypass ...
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0answers
50 views

How to learn making LED circuit from the beginning? [closed]

I have to set up an experiment of Visible Light Communication system in which the transmitter is LED and the receiver is smartphone camera. I just have knowledge about networking and programming. So ...
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0answers
28 views

Want to learn how the layers of a die from a SoC Processor IC is organized/arranged?

Does anyone know how the layers of a die from a SoC Processor IC (Qualcomm Snapdragon) found in many smartphone devices are arranged ? How the chipset (which handles the IO such as USB, Touch Screen) ...
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1answer
56 views

How difficult is to reverse engineer a IC Die?

Can anyone tell me how difficult, time consuming and expensive is to reverse all layers of a die ? Say a die from a recent model SoC Processor IC found in smartphone devices such as the Qualcomm ...
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1answer
69 views

Textbook for learning analog IC design? [closed]

I am currently using Carusone's "Analog Integrated circuit design", but this book seems more suited as a reference book for professionals who already know the subject. Are there any good alternatives ...
2
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2answers
191 views

First chip with 1000 or more transistors?

I am wondering what was the first chip ever with over 1000 transistors? I already am aware of the following: The Intel 4004 was the first commercially available single-chip microprocessor and it ...
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2answers
106 views

How to increase microntroller pin Source and Sink Capacity

I'm working on a project but I've hit a block now. I need to drive a total of 169 LEDs using 26 pins at worst case all may be ON at once. I'm afraid that this may fry the MCU since 200mA is absolute ...
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1answer
69 views

Single bit of memory

Is there an IC which provides 1 bit of memory? I'm thinking something like an IC that has GND, VVC, input value, input set/clock, and output. It maintains its output value at HIGH or LOW until ...
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0answers
78 views

Voltage of Logic Low on ICs

I'm currently trying to create a 4 bit ALU using the CD4011BE quad 2-input CMOS NAND gate ICs. However, I'm having some trouble when creating the full adders. Sometimes, when the IC outputs logic ...
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0answers
69 views

Reverse 12V dc motor with 2 buttons that are ground buttons when pressed

I bought a small navigation system screen from ebay that I would like to install in my car. I want to put this in my car for a car pc. The screen has a small 12V DC motor that opens / closes with the ...
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2answers
60 views

lm324 if i feed it with Vcc but not grounded it,what the value isee on GND pin?

I have lm324 in my circuit and I connected Vcc pin To 5V, but GND pin is not connected (float), so What the value I see on GND pin ?
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4answers
399 views

Flash a light in a specific pattern

It is quite easy to flash a light in say, 0.5 seconds on, 0.5 seconds off. But what if I wanted to flash it say 0.5 on, 0.5 off, 1.0 on, 0.5 off? Are there any IC's that would allow that?
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1answer
24 views

DAC circuit and ampli op

I'm looking for a DAC in order to convert a digital signal of 8 bits into an analog signal of 0 to 5 volts with an ideal precision of 1 LSB. It is the first time that I look for a DAC and I'm not an ...
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1answer
31 views

SOJ socket to PCB

I was wandering, is there some socket for ICs (memory) with SOJ packaging? I mean one that would have contacts that could go through PCB. Like some hybrid between SOJ socket SMT and DIP socket. Or can ...
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2answers
53 views

555 timer circuit error

I have recently built a circuit with a 555 set in monostable mode which was supposed to turn on three bright LEDs for 51 seconds when a button was pressed.The button was connected with some long ...
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1answer
37 views

IC FLASH replacement? [closed]

I was working on a schematic design and wanted to modify a part. The part number is W25Q16DWSSIG made by windbound. I'm trying to replace it with an IC flash with a lager storage and faster speed. It ...
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0answers
51 views

IC chip: reverse current

First lets talk generally, if there's reverse current, how do I track it down to find the source of it? If I look at the component datasheet, what parameter do I look at and how do I determine it? Is ...
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4answers
93 views

74HC00N getting really hot with 5V and GND attached

I'm doing a project with an SN74HC00N NAND gate and when I wired it up the chip got really hot really quickly. I immediately unplugged everything and tested just with 5V and GND plugged in and none ...
4
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1answer
263 views

What is a good process to replace a discontinued part?

I have been looking about (on the web and printed catalogs) attempting to replace a part that is now discontinued. The experience has been part success - and part failure. A part is available to use ...
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2answers
69 views

I am interested in circuit designing .How should I start with it from scratch? [closed]

I am a 2nd year btech student in electronics and communication engineering.
36
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5answers
3k views

Can I cut an IC?

As far as I understand, the die of a DIP package is located at the center and the rest is just the lead frame. Given that I have unused pins, can I cut the top part of this microcontroller ...
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1answer
31 views

Using an analog demultiplexer as a digital demultiplexer

If I want to use an analog de/multiplexer as a digital demultiplexer, do I have to use pull-up / pull-down resistors? For example when driving a CMOS IC like the 4015 with the CMOS analog 4051, do I ...
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2answers
86 views

What value determines the current flowing between two interconnected ICs?

If I connect two ICs (lets say two Arduino UNOs with one pin configured as OUTPUT and another as INPUT), something must limit the current so that there is not a short circuit when driving HIGH. What ...
4
votes
2answers
108 views

What are the holes on an optical flow sensor IC?

The right hand image is a flow sensor IC for an optical mouse available from Sparkfun. On the left is another optical flow IC with a camera attached from a Chinese distributor. It seems that the ...
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1answer
44 views

Why does the l293 have a higher current than the l293D?

I know the "D" mean diode, so it has a built in diode. I would not think that the addition of a built in diode would lower the current rating by that much. Also, if I were to use a l293, where would ...
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3answers
202 views

AND Gate IC 7408, the number means?

Why it is 7408? What does it mean? Why it is used for AND Gate?
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1answer
23 views

When wiring an anlogue switch to grounded button, which goes to Y and Z?

I'm wiring an analogue switch (74HCT4066N) to throw a grounded switch. The datasheet says that the recommended Vsw value should be between GND and Vcc. This means that it's important which of Y or Z I ...
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1answer
30 views

Modifying memory of an integrated circuit

The integrated circuits of EMV-chips (normal credit cards) claim that their memory is physically protected, is it possible to make an integrated circuit in which the memory can only be modified and ...
0
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1answer
25 views

CD4017BE output pin question

I am designing a circuit which uses a CMOS decade counter to activate and deactivate pairs of transistors in turns.The problem is:will the IC be damaged if the current of one of the outputs(activated) ...
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0answers
17 views

RFID Module Integration

Disclaimer - I am very very new to Electronics (literally a week), but am doing a lot of reading to try and catch up with the knowledge I need for my eventual project. Background: I run a lot of ...
2
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1answer
37 views

How do electrical signals not get out of sync in CPUs and other integrated circuits?

I'm a newbie at electronics and this question has kept me occupied for a while: How do electrical signals not get out of sync in integrated circuits and CPUs? For example, let's take a look at 3 bit ...
20
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5answers
1k views

Silicon bugs, errata sheets

In many (most??, all??) microcontrollers that I have used over the past years, there where sometimes some silicon level bugs, and the manufacturers provide the engineers with the errata sheets, ...
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2answers
37 views

CD4017BE IC datasheet confusion

I am going to incorporate this 4017 in a circuit and I have downloaded its datasheet,but I can't understand some parts of it. What is the max Vdd current? And the max current & voltage of the ...
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2answers
35 views

Picking battery for power amplifier

I have bunch of TDA2003 (class AB) amp ICs and I would like to make some amplifiers with them. One would be stationary bridged 20w version and one portable version. However I'am a beginner and I never ...
0
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1answer
68 views

Shift registers, flip-flop, Multiplexer & Demultiplexer with microcontrollers utility

While i read alot about the popular 74HC595 shift register and its use for multiplexing i can't find anything about the following chips: MC14053B Triple 2−Channel Analog Multiplexer/Demultiplexer ...
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1answer
58 views

Is there a shared lead AND Gate IC? [closed]

Hi I'm an electronics hobbyist still learning some basics of digital logic. I'm looking into building an arduino shield, but I want the arduino pinouts I'm using to be accessible when the shield is ...
0
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1answer
53 views

Datasheet assistance request

I'm trying to incorporate a USB-PD controller into my design for a Dual Role Port (DRP). I'm currently building with a Cypress CCG2 24-pin QFN, and using their reference block from the datasheet found ...
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1answer
40 views

Placing covered vias routing signals under microcontroller termal pads

Placing covered vias routing signals under microcontroller termal pads is a good practic? I mean to reduce soldered termal pad area to center(connected with vias to gnd) and place covered(with ...
2
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2answers
269 views

Is there an audio amplifier chip or circuit that amplifies certain amplitudes in a signal less or more than other amplitudes?

Like for instance, that would amplify on an exponential curve where the lower amplitudes get the maximum amplification and the highest amplitudes would get no amplification? Is there an analog chip ...