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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Having to double press a tact switch?

I have created a simple circuit consisting of a 4017 ic, a tact switch, and arduino. The arduino is just for debouncing purposes. For some reason i have to double press the switch for the input to go ...
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42 views

Safely removing bonding glue from an IC in order to identify it?

I have an IC, that has 5 visible bonds. The entire IC is covered with some sort of semi transparent bonding glue. I want to identify the IC and were thinking to remove the glue somehow. What chemical ...
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1answer
58 views

What is the correct name for this chip? And how to read it?

I seen this type of chip on credit cards and various other electronics like printers. What is it called in the electronics field? Is there a specific protocol on how to read and write to it? Is there ...
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1answer
34 views

Understanding of UC384n

Can you explain schematic of IC UC3842/5? First of all here general schematic: What I can't understand is lower left corner and pins number 2(VFB), 1(COMP) and 3(CURRENT SENSE). What I understand ...
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1answer
41 views

What do I need A0 in a USB Controller (PDIUSBD12)?

I'm reading the datasheet of the USB controller PIDUSBD12, but I can't understand what the goal of the A0 pin. In the controller there is a data bus (D0-7) and this A0 pin, the datasheet says that ...
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20 views

CD4029 sequential up/down counter

I had a circuit (but have lost it) that used cascaded CD4029 chips that counted clock pulses to 17 and stopped. Then if the down pin was enabled it counted down to zero and stopped. A different ...
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1answer
30 views

DDR2 data rate and data bus confusion

I am reading on DDR2 memory from past few days and have got confused with some of the terms involved. I am mainly confused from discrete memory (single DDR2 memory IC) rather than DIMM module which ...
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0answers
15 views

full inverter circuit with a buzzer circuit [duplicate]

I analysis the Lm324 circuit and i understand how it work without the C9 and C11 , but I want to know what the function of these tow capacitors.
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1answer
45 views

How can a transistor be made smaller without changing the electric field?

Every time they introduce a new process node with reduced feature size, they tend to reduce the core voltage. The reason why is that the reduced size results in larger electric fields if they do not ...
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2answers
101 views

IC pins too small for my breadboard

I recently bought some IC's with 8 and 16 pins. I was used to work with bigger ones, so now I cant test them in the breadboard without soldering an individual wire to each pin (which would probably ...
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1answer
12 views

Chip with one oscillator provide different brightness (PWM) for multiple LEDs?

I'm working with the PCA9531 chip described as The PCA9531 is an 8-bit I2C-bus and SMBus I/O expander optimized for dimming LEDs in 256 discrete steps It is a chip that provides 8 PWM outputs ...
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3answers
483 views

How do integrated circuit design companies create their datasheets?

Especially for something like a microprocessor. I assume the majority of information is "auto-generated" or we'd see a lot more typos and errors. A laughable scenario keeps popping into my head ...
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1answer
34 views

Substrate design in MOS ICs

In CMOS technology, why does the substrate always have to be p doped? When we need a p-channel MOSFET, we generally create an n-well into it and create p source and drain regions. Why does the balance ...
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1answer
53 views

The Use and reason for High K materials

I am new to advanced integrated circuits as it is my first course on the subject and there was a discussion about geometrical scaling in the seminar. The discussion proceeded with the fact that ...
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1answer
26 views

(w+x)-(y+z) operation with half adder and half subtractor

I can't seem to solve this problem. Already, I'm little confused because of using half adder and half subtractor. I have tried to draw then stuck. How can I make the operation by half adder and half ...
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1answer
70 views

Will one pic programmer program all pic chips? [closed]

If yes which one and where could i buy it and is there an inexpensive programmer for the chips?
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2answers
332 views

Designing an 8 x 3 memory chip given 2 4 x 3 chips

I'm working on a problem that asks me to design an 8 x 3 memory chip given 2 4 x 3 memory chips. I'm not sure how to approach this problem. I've looked at the textbook and found various online ...
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1answer
47 views

Powering ATtiny85 for temperature sensing

I have been working on a miniature temperature sensing module which buzzes once the temperature crosses a threshold using ATtiny85, lm35 and a pico buzzer. When I power the whole circuit using an ...
2
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1answer
87 views

how to program the smd atmega328

How do you program the smd atmega328 ic in an inexpensive way?I know you can get a factory to program the chips but is there a way to program them with arduino without one of those expensive sockets. ...
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2answers
491 views

What does it mean when components in schematics do not connect?

I'm fairly new to the whole Arduino world, and I'm just really curious about this schematic that I came across... I can read the basics of a schematic, but this one has me puzzled. What are the ...
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1answer
113 views

Difference Between LM386 and LM741 [closed]

What is the Difference Between the Normal Opamp LM741 and the Audio Power amplifier LM386.. I mean in both the circuit we use the concept of voltage compensation, then how come LM386 is called power ...
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2answers
108 views

How to make a stopwatch timer [closed]

I want to make a simple stopwatch timer using simple materials such as a breadboard, a couple of IC's (integrated circuits), wires, resistors, capacitors and transistors. Is it possible without doing ...
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2answers
49 views

Detecting HI-Z state of charge controller

I have been building a Li-Ion charge controller with MCP73831. The STAT pin has 3 states as shown below: The circuit I come up so far is this: Is there a way to detect the HI-Z state with ...
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2answers
63 views

Op Amp saturating below supply voltage?

I would like to know why op-amps saturate below their supply voltage. For instance I have a circuit with an LM358-N amplifier IC that is powered at +5 [V] and connected to ground on the other rail. ...
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1answer
40 views

Ambient temperature vs operating temperature?

I would like to know the difference between Ambient temperature vs operating temperature? In datasheets they specify operating temperature for IC's. ex -25°C to +125°C, so does this mean even though ...
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2answers
67 views

Designing a MOSFET current mirror circuit

This is the design problem: This is a brief of my design for W and L of the transistors and R: I've connected the upper voltage source to ground and made the lower one equal to 0.4 V to make ...
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3answers
605 views

Term for a chip that is used in a camera to detect light

In terms of an integrated circuit, what is the term for a chip that is used in a camera to detect light? I hope this photo helps. What is the technichal term for the light sensitive IC in a camera? ...
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37 views

Instrumentation amplifier and op amp V+ and V- shorted internally

I have an INA2126 instrumentation amplifier and an OPA277 operation amplifier. I was trying to check if it is busted or not by using the continuity test of the analog multimeter. I'm not sure if it's ...
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2answers
47 views

MOSFET as a switch. Why does the voltage depend on the gate?

Let's say I have an NMOS, the gate is connected to 5 volts, Vth is 0.7 volts and I want to pass a voltage of 7 using the NMOS as a switch. Can you tell me what will be the voltage at the source? Will ...
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1answer
61 views

need help identifing IC's and symbols from a diagram

I am tring to make a circuit and need to purchase the required components but there are some IC's that I can not identify. I tried to google them up but I haven't found anything helpful yet.I also ...
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2answers
103 views

Is there any 1 byte ic? [closed]

I need a system where 1 transistor = 1 bit. with a capcitor for each bit as ram, this would become space consuming, is there an ic that will act like 1 byte ram?
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2answers
112 views

Is there a simple circuit that outputs (min+max)/2 of a single-ended signal given as input?

I have a digital, single-ended, signal that randomly varies between +400mV (logical ‘1’) and 0V (logical ‘0’). I am looking for a circuit to calculate the DC value that corresponds to the average ...
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1answer
58 views

What is the relation between the 5 nanometer process and the end of Moore's Law?

The 5 nanometer process is expected (According to the Intel Roadmap) to be in 2020. In this Wikipedia article, in the first paragraph, they say that: 5 nm was once assumed by some experts to be ...
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3answers
120 views

How to level shift an analog signal?

I have a sinusoidal input signal (with a swing of 100mV roughly) centered around 100mV (DC). This signal needs to be input to a CMOS inverter. For this I need to level shift my signal around the ...
2
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2answers
107 views

Can I use LM324 as a Schmitt trigger?

I need 3 opams for a circuit. One for amplification, one for level shifting and one for sharpening badly shaped pulses, For the last part(pulse sharpening) I want to use a comparator/schmitt trigger. ...
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2answers
60 views

Formula for identifying the 555 timer IC chip interval

Hi I am pursuing my hobby in electronics and I would like to learn more about IC chips. I have searched the internet for the most basic IC chip and the result is the 555 timer IC chip, I was wondering ...
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1answer
45 views

accelerometers vs gyroscopes

In terms of semiconductor integrated circuits, is there any difference between an accelerometer or a gyroscope? are they the same part? Can I get a IC recommendation for something with 3 axis?
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1answer
33 views

Charging small capacity battery

I have a questions regardin charging batteries. I have a Li-ion, 3.6V, 150 mAh battery and I am looking for a suitable charger. Unfortunately I was not able to find a compatible charger. The ones I ...
2
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1answer
176 views

Raise input for a voltage monitor IC

I was looking over LTC2990, which is a voltage, current and temperature monitor. It is perfect for my project as I'm newbie. I want to build a power supply which will show on a display the voltage, ...
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1answer
38 views

Hooking up a HD74LS86 IC

So copying a little bit of what this guy showed on youtube, I tried to get my HD74LS86 ic. Here's what I tried to do: Edit: I forgot to draw a resistor between the led and ground. I put switches ...
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87 views

Quiz Buzzer circuit using IC 74LS373. Not resetting after cutting off supply

I am confronted with a buzzer circuit using a 74LS373 which is a 3 state octal D type transparent latch and edge triggered flip flop. This is my first ever attempt to use this type of IC. My search ...
2
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2answers
102 views

What are some examples of MSI (Medium-Scale Integration) circuits that are used for doing arithmetic?

Just looking for some examples of MSI circuits used for doing arithmetic. I understand MSI circuits have more than 10 but less than 100 gates, or less than 500 components.
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1answer
45 views

Allowable rise rates for logic families

The 74HC595 and the 4094B shift registers are quite comparable in their functionality. However, under the hood there are many differences in their specifications, e.g. the supply voltage range. I can ...
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1answer
97 views

What is this yellow “liquid” on the graphic card? [closed]

Currently I've been assigned the task to try to fix a laptop. The problem was a malfunctioning graphic card. It has no image what-so-ever. I've looked all over the circuit and found no burn marks ...
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3answers
143 views

How Can A Coded Firmware Control Hardware [closed]

I really want to know how could a virtual coded program really affect and imitate and animate a piece of hardware. I Have Always Seen The Diagram Of Processors In the Book Showing ALU and CPU as The ...
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2answers
54 views

How can I find out basic information about what an IC does, if it isn't clear by context and google doesn't reveal anything useful?

For example, I found a Sony CXM4015R. When googling I couldn't find any information or datasheets on it, but at least I would like to know its basic function. The only (unreliable) hint I found was ...
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1answer
55 views

PWM generation with AVR

What is the best way to generate 5 PWM signals in range of 10 KHz with AVR ATMega16? I am thinking about a few possibilities: 1- Does AVR generate any PWM signal automatically on any of it ports? (I ...
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48 views

Function of enclosed digital circuit

I have a digital circuit which scheme is on the enclosed picture. This circuit is a part of a card which is connected to a microcontroller. Through inputs BD0-BD7 is written one byte into the D-latch ...
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3answers
143 views

What is that? chip identification

What is that? No HD-SDI signal. Black magic camera motherboard
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1answer
64 views

What is the circuit size and/or circuit depth complexity of an op-amp?

What is the circuit size complexity and / or circuit depth complexity of an op-amp? This is for comparative purposes, so I'm really after a ballpark figure and any op-amp is fine (although the ...