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Questions tagged [integrated-circuit]

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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I want to amplify the 0-500 mv DC supply up 12-18 v DC with IC . I have 12 v dc supply without ground. Please send me sketch of circuit [on hold]

I want to amplify the 0-500 mv DC supply up 12-18 v DC with IC . I have 12 VDC auxiliary supply without ground. Please give the circuit.
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Parallel RAM without large number of pins?

Back in the 1970s, Texas Instruments had a now-discontinued range of products that they called GRAM (and read only equivalent GROM) which was basically a standard memory chip with address and data all ...
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1answer
50 views

Logic circuit shutting off at target voltage

I deleted the old question and posted another one because I felt the question is now substantially different. I have a potentiometer connected to a current source and I want the logic chip to cut off ...
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2answers
32 views

Measuring floating gate potential with minimal leakage current

I am working on a sensing device where the voltage of a floating node is dependent on the quantity to be sensed, as well as the net charge stored in the node. I would like the device to be only ...
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1answer
42 views

What kind of PMIC is this?

I found this circuit in a schematic I'm reviewing, which supposedly provides a regulated +5 V supply. The primary side of the transformer includes a flyback controller that switches ~340 VDC on the ...
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1answer
68 views

LEDs to indicate Data being transferred

just asking for some reassurance really, probably a novice question. Thank you in advance for any advice. I am building this project: https://github.com/brianmarkpeters/CHIP_BASED_SYNTHESIZERS/tree/...
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74 views

Safely Remove IC from PCB

TL;DR - What is the safest way to "harvest" an IC from a PCB for reuse in a different PCB? So I'm working on a prototype that uses the MPU6050, but I think since they've been marked Not For New ...
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29 views

Is it possible to boost the current using LT1302 dc-dc boost converter. Furthermore, the input current is in micro amp range

I am working in the area of energy harvesting. I want to know is it possible to boost the current using LT1302 or any other IC. The input current of the device is in microamp (2-3 microamp) and ...
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1answer
29 views

Does the Si4731 / Si47xx provide the necessary info to fetch left/right demodulated audio levels?

I'm working on a project which uses an Si4731 broadcast radio receiver IC (Si47xx family) and which calls for left & right demodulated audio level meters based on a source FM broadcast signal. I ...
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43 views

Jellybean Radio Button logic Chip

Below is an LTSpice simulation of a 'radio button' circuilt. Ignore the bottom button, I am working on a 'reset' mechanism to unlatch any of the other buttons. The idea is that the button you push, ...
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2answers
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Component searching

I'm not sure this is the right way to ask this, but I'm giving it a try anyways. I'm essentially looking for a component that using a clock signal can open and close 4 other channels. ...
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3answers
293 views

Not enough pins, looking for a “demultiplexer” that keeps state [closed]

I want to control a simple display with a microcontroller. The display has 8 input pins, the microcontroller only 6. Is there an IC that I can interpose that lets me set the state of each of its ...
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1answer
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How do I get the sum and carry expression for ripple carry adder?

please check the photo and kindly let me know how to find the expression. I know sum expression only with xor gate. Cannot come to this conclusion.
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2answers
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Using OR controller TPS2115A

I have put together a circuit with TPS2115A, it's feeding a camera from two 5V 20Ah (USB) power banks. The IC (TPS2115A) is used in automatic mode, i.e. whichever supply is higher is sourcing current, ...
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2answers
69 views

Are bacteria on integrated circuits problematic?

Considering the scale of IC's using sub 50nm technology, I would think that even thought fabs are incredibly clean, there would still be a substantial amount of bacteria. Do they prove problematic in ...
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1answer
22 views

KEM-2542 LED Display Driver

electronics is my hobby. I do many mini projects. Don't know deeply, like create a whole new circuit with a IC datasheet. My problem is, I have a LED Display KEM-2542 (188.8)(3.5) from a old device......
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67 views

AI hardware architecture

I am looking for more info on AI hardware architectures, but I am a bit confused. Here are my questions: Does it all come down to MACs(Multiply And Accumulate) units? Do MACs usually integrate into ...
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2answers
74 views

Adapating a single cell Li-ion battery voltage to 3.3V low power application

I'm planning to use a single cell Li-ion battery to power up a custom made circuit. I'm planning on using a ESP-12E module board as the application will need to connect every once in a while to ...
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1answer
98 views

Burned IC (Has something to do with USB)

As I was working on a project, I made a short and an IC caught fire and the magic smoke escaped. It was the IC U5 on the schematic (1). I am trying to find a replacement for it but I don't know what ...
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27 views

Using a comparator in tinkerCAD circuits

For anyone familiar with the TinkerCAD circuit design tool I am trying to create a simple circuit for an 'LED chaser' pattern (this is what I have seen it called elsewhere). In order to create this ...
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1answer
37 views

Quad XOR IC query 4030/4507

My question is two fold. Looking at the Wikipedia page for the List of 4000-series integrated circuits, it states that the 4030 has been superseded by the 4070. Looking at various links1 it seems to ...
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1answer
46 views

Driving 16-segment displays with MAX7219

While the code for this in theory makes sense to me, I can't find any examples online so I wanted to check to see if the wiring actually works. I've used the MAX7219 for both 7-segment displays, and ...
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1answer
340 views

I2C IC for part identification

I am looking for a way for a host system to identify that a certain mechanical module C is connected to it. This mechanical module doesn't need to have any electronics in it, but due to host ...
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0answers
35 views

cost efficient BOM for total 10x12 16 segment (1920 led) display

I've already built a few test prototype for a large(ish) 16-segment display board. I want to use a Arduino of ESP8266 to run it, with external power, and ICs for the Characters. So far, I've been ...
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3answers
72 views

Ambiguous symbol [duplicate]

Does anybody know what this symbol presents?
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1answer
871 views

Is my IC broken?

I'm making my first circuit for a line following robot. I already made the prototype, soldered it together, and now I'm at the assembly stage. Here is the circuit diagram I'm using: What should ...
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2answers
82 views

USB type-B sockets vs USB Mini-B sockets [closed]

Most Programmers hardware equipped with USB type-B connectors for connecting to PC. USB Mini-B connectors are much less used in device programmers. Have the USB type-B connectors any advantages or ...
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1answer
30 views

Question about using variable reluctance sensor

I am integrating a variable reluctance sensor into my project. These take the the signals produced by inductive pickups and convert them into nice square signals that a processor can use. Quite often, ...
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1answer
69 views

LM339 Incorrect Behaviour for Two Elements

I am designing a monitoring circuit for a battery powered device that is charged from a solar panel. The circuit uses an LM339 to indicate the input voltages via two dual colour LEDs, one for the ...
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0answers
121 views

What are those components?

I am doing a reverse engineer project but I can't find what these components are. Can someone help me? The components have the folowing text on it: IC #1 = 7HUH 7HUH IC #2 = AAPQ AAPQ Here you ...
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1answer
88 views

Wire to VDD or GND?

In the circuit below, there are four LTC485 ICs, one input (left), three for output (right). Pins 2, 3 and 8 are going to +5V, as well as GND. So where should I connect them to? Should I wire them all ...
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1answer
57 views

Damaging BCD-to-decimal decoders?

(ACTUAL QUESTION IS AT THE BOTTOM) I am a beginner in electronics and am learning more day-by-day to my best. I first got interested in Nixie tubes a few years back, so those are what I play around ...
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1answer
21 views

Question about equation for LT3750 capacitor charger IC

I have a question about the equation for minimum primary inductance on page 8 of the data sheet for the LT3750 high voltage capacitor charging IC. The equation in question: $$L_{\text{pri}} \geq \...
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1answer
30 views

SC16IS740IPW alternative - want DIP housing [closed]

I am working on Infrared receiver based on Vishay's TFBS4711 and I've added SC16IS740 Single UART with I2C-bus/SPI interface for simplyfing communication with ...
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1answer
75 views

Input impedance of Op amp calculation

As a part of my project I created an CMOS Op amp and I want to go through all parameters. In Op amps data sheet there are terms like input bias current and input impedance. How this terms are ...
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3answers
643 views

Is there a lower limit on operating frequency of CMOS SRAM?

I study computer science, and so I am in the deep end here. I have set upon designing a machine which requires RAM. I found a listing for Toshiba's 128KB (8 bit per word) SRAM (TC551001BPL). I intend ...
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2answers
77 views

Synchronizing IC Temperatures

I have several separate identical PCBs with identical ICs on them. It's fairly critical for this application that all the IC's are synchronized in regards to temperature. E.g. if one increases by 1 ...
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3answers
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Building a device to reduce pulse frequency by a variable amount

A speed sensor on the wheel of a mini motorcycle sends pulses as the wheel rotates. It may send 1, 2 or 4 pulses per tire revolution, so let's say that at top speed, it may have 10, 20 or as many as ...
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3answers
78 views

Longest, thinnest trace length to decoupling capacitor before capacitor is effectively useless

I was told time and time again to always put decoupling capacitors as close to the IC pin's VCC as possible. Sometimes when I make complex boards, I try my best to put the capacitor lead so close to ...
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1answer
35 views

VLSI channel routing: Why only route through channels?

I know that after placement you have your blocks and channels between the blocks. Now, the routing only takes place in the channels. My question is: Why can't we just route 'over' the blocks by ...
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1answer
56 views

STP16CPS05 Sink Driver External Resistor does not change output current

Have a 10 x 10 LED array sourced with CD74HC154 Decoder/Demultiplexer to PNP Transistors (rows) and sinked with STP16CPS05 Sink Driver (columns). This is driven with an Atmega328P. Rows and columns ...
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1answer
110 views

Cannot successfully setup LM741 op amp

I've been trying to setup this op amp for the past couple of hours, and I can't seem to do it successfully. I have a single supply, so I created a voltage divider with resistors to get +ve and -ve. I ...
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1answer
43 views

High Side Driver IC - Application Information

I have a question regarding VN5025AJ-E: High side driver IC. Datasheet link - https://www.st.com/resource/en/datasheet/vn5025aj-e.pdf In the figure you can see the application schematic. In the ...
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2answers
112 views

Knowledge of electronic devices is hard to learn? [closed]

I want to learn about more about electronics,but I don't know where to start, because there are too many electronic devices out there. If I can, I am willing to learn integrated circuits first, but I ...
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2answers
85 views

-12v supply from +12v

Part of my circuit needs -12v. What would be the simplest way to get this, considering I have a +12v supply already available in the circuit? I need ~500ma I searched for -12v regulators on Mouser, ...
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1answer
73 views

Which IC can support LED debug of logical circuits?

I am new to electronics, and am playing with some ICs (555, 74393, 74595 and logics like 7400) on the breadboard. To see what happens, I would like to put LEDs at various places in the circuit. But I ...
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5answers
139 views

I2C monitoring without Microcontroller [closed]

I am trying to read data from an I2C connected touch sensor. Specifically the Azotec IQS266. I plan to preprogram all of the settings the way I want them, and then not touch them again after that. In ...
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5answers
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What happens to components which stop being manufactured?

When a component/IC stops being manufactured, due to newer, and maybe more efficient, etc, chips becoming available, what happens to the designs? Are they released, so that somebody else can ...
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4answers
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SOIC -16 IC Orientation

I've just soldered a SOIC-16 am26c32 on to a breakout board. The datasheet shows the orientation of the chip by means of a semi circle at one end (http://www.ti.com/lit/ds/symlink/am26c32.pdf). ...
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2answers
91 views

How do they make photo lithography lens so accurate?

How are the lenses and other apparatus required for projecting a miniaturized version of the circuit using photo lithographic technique for IC manfuacture made? Its known that even the tiniest spec ...