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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6
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3answers
722 views

What well-known ICs have essentially no packaging?

As a kid I once found a calculator whose IC was protected only by a loose plastic cover. With the cover removed, and with appropriate lighting, I could make out distinct features of the IC– including ...
-3
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0answers
24 views

1.5A micro motor driver transistor/IC for micro quadcopter-arduino [on hold]

im planning to make micro quadcopter using hubsan micro motors that i ordered from ebay (CL-0720-12) together with corresponding hubsan x4 proppellers. At max voltage (3.7V), motors load current is ...
-4
votes
1answer
66 views

How to Test IC Using a Multimeter [on hold]

A few Days Back We Had A Competition in Which They Gave us Various ICs Placed on a 8085 Trainer Kit the Number on ICs were Hidden and We Were Asked to find Which ICs were They Just By Using a ...
0
votes
2answers
62 views

Unidirectional motor control

I am interested in controlling the speed of multiple small DC motors that will draw at most 1 amp each. I only need to run them in one direction, so an H-bridge IC like the SN54410 seems like the ...
0
votes
1answer
18 views

8 bit adder with 2 CLA

I need to make an 8 bit adder with 2 4-bit look ahead adders.I spent a lot of time reading about it and I think I get the gist of how it works, but I can't seem to get this. I spent a lot of time ...
5
votes
1answer
623 views

Is it legal to reverse-engineer an integrated circuit (IC) belonging to a manufacturer [on hold]

Can anyone tell me whether it is legal to reverse-engineer a chip to prove the existence of possible backdoor technologies in which the device or IC manufacturer likely is unaware of?
0
votes
1answer
65 views

High side switch won't turn off

I'm using the ISP762T. I have a 12V power source and all I want to do is switch it on and off (via microcontroller) depending if I want to power my 12V circuit or not. That datasheet says present a ...
4
votes
3answers
63 views

What technique is used for thermistors embedded in an IC, and what should I think about when measuring them?

I would like to measure the resistance of a thermistor integrated in an older CPU, the Motorola Freescale NXP 68060, but the documentation is limited. This is all it has to say on the subject: ...
2
votes
2answers
130 views

Why there is no decoupling capacitors in analog IC

Here is a CMOS two stage amplifier. As you can see there is no decoupling capacitor at all. Also I don't see decoupling capacitors that are used in CMOS integrated circuits. Could you explain why? ...
-3
votes
1answer
55 views

What is the DIP IC abbreviation? [closed]

If I am being correct, DIP means that some microcircuitry is embedded into uniform plastic or ceramic casing, which makes it more robust to physical damage and allows to connect to the breadboard or ...
0
votes
0answers
32 views

LF347N IC Eagle [duplicate]

I am using LF347N IC for a project. The problem is that I cannot see the V+ and V- pins(4 and 11) respectively in my schematic or the board layout. As a result, I cannot power up the IC. Please help.
0
votes
1answer
37 views

how to get delays of a circuit under process corner in hspice?

my circuit is composed of a chain of inverter (delay line), and i want to see how the delay of this chain of inverter behave in process corner? i want to know if the delay line will be still ...
0
votes
1answer
31 views

Would having a DC-to-DC Step Up Converter Damage the L293D H-bridge IC behind it?

I recently purchased two L293D H-bridge Motor Controller from Adafruit (data sheet here), but after reading that the controller could only output a max of 600mA for a short time, I realized I had a ...
0
votes
2answers
53 views

IC specification

I am pretty new to this, and I am trying to learn about what specifications I should be looking for when doing a chip replacement. For example, lets say I know 100% sure my BIOS chip is broken. And I ...
-1
votes
1answer
96 views

TEG inquiry for my design project [closed]

i bought a TEG1 127-1.4-1.0 in its specification the voltage is 3.2v but when i try it the voltage is only at the range of 300mV to 1.2v but when i connected 6 Pc in series its voltage is only at the ...
0
votes
0answers
48 views

How does λ relate to a given process technology?

I'm studying physical design and I'm having a little trouble understanding the design parameter lambda (λ). From what I understand λ is equal to 1/2 the minimum feature size, which is helpful for ...
0
votes
0answers
43 views

Suitable Schottky (Dual) Bridge Rectifier ICs to protect stepper motor drivers [on hold]

I need to protect a number of 24V stepper motor drivers from cable disconnects as described in "Adding diodes to easy driver stepper motor driver". This means using eight Schottky diodes with a ...
0
votes
1answer
41 views

Auto-start after power off in nvidia TK1 board

I'm trying to make my Nvidia board (TK1) to boot automatically. i.e., when the power goes off and comes back again i want the board to power up automatically. I have tried the Nvidia forum and found a ...
1
vote
3answers
105 views

On/Off Circuit for my USB LED [closed]

Its my very first question here and I am very new to circuits. I have an LED with USB connect port that turns On when connected to my PC. I want to make a circuit and turn it On/Off using some ...
0
votes
1answer
80 views

Commercially available current conveyors [closed]

Are there any easy to buy current conveyor ICs? I did a search of a few electronics distributors but I could not find any. I would not know the part number anyway, as I don't not which if and ...
3
votes
3answers
139 views

Why are my components unconnected in the middle of the breadboard?

I have this breadboard: And I need my Integrated Circuit to be connected exactly like this (Don't pay any attention to the wires. Let's focus on the IC in the middle of the breadboard itself): ...
-4
votes
0answers
75 views

Measuring voltage with a ic?

I am designing a lithium battery charger for a project, I would like to add a something that will send out 5v if the voltage is below 12v, is this possible? -sorry for bad explanation.
1
vote
3answers
130 views

Is the MOSFET source always connected to bulk?

I'm trying to understand all the basic connections of a MOSFET. These questions may seem very basic but I have flipped every single textbook I own and googled every single website and never found a ...
1
vote
1answer
42 views

Is there a common wire color for PGD and PGC?

Is there a common color for micro controller programming data and clock wires?
-1
votes
1answer
45 views

Switching mechnism

I am designing a power supply which has two output port. Only one should be selected at any time and given power (depend on if any one is connected to a load). I intend to use a current sense at the ...
0
votes
2answers
65 views

Can't get 74LS00 and similar integrated circuits to work

I bought a pack of 5 ICs from radioshack. (74LS00, 74LS02, 74LS04, 74LS08, and 74LS32 to be specific). And I can't see to wire them correctly. I've wired pin 7 to ground, pin 14 to 5V(from an Arduino ...
1
vote
0answers
41 views

MPR121 low sensitivity problem

I bought the Adafruit MPR121 and connected it to a piece of metal which is covered by gaffer tape (no direct touch possible) talking to the MPR121 with the Adafruit library. The baseline/filtered ...
0
votes
2answers
85 views

What to do with unused chip amp channel?

I'm planning to use STA540 in a guitar combo, because it's one of a few chip amps that can give me about 15W with 12V supply and 4ohm speaker. My problem is that the chip has four amplifiers and I ...
3
votes
4answers
88 views

RC car steering circuit: what does it do?

I have just disassembled a RC car. Attached to the stepper motor that controls the steering of the car was a small circuit board with a cog wheel attached to it. I am trying to figure out what this ...
0
votes
0answers
44 views

Stanley garage door

i've an old Stanley garage door remote that is giving is last breath, i want to make a new one so i can put it in those "extra buttons" in my car dashboard but i can't find the datasheet for the IC on ...
0
votes
0answers
18 views

Ways to improve saturation time in Multiplexers

I'm using max4708 multiplexer (operated as single supply 36V), when i tested the multiplexer- my inputs, for example +32V, +20V get well saturated at 20Khz.Later when i added to the circuit, for the ...
1
vote
2answers
78 views

What exactly makes ICs have different operating temperature maximums?

What exactly happens to an IC that is (for example) specified at maximum 85 degrees C? Also, being made from I assume similar materials, how is it possible for another chip to have a higher rating ...
0
votes
2answers
92 views

How does the op-amp deals with negative inputs?

The diagram shows the internal circuit of a 741 op-amp. Q1 and Q2 are both NPN transistors. So current can only flow through the transistors if a (large enough) positive voltage is supplied to pin 2 ...
4
votes
1answer
82 views

Consistent failure of THAT 1646 line driver IC. What could be the cause?

I work with audio electronics in the touring concert realm and I've been seeing a gross failure of a certain balanced line driver IC, the THAT 1646. Main symptom is no output and most common failure ...
1
vote
2answers
80 views

-5/0 volt to 0/5 volt logic levels?

Does anyone know a good way to convert -5/0 volt logic to 0/5 volt? I'm using a chip as seen in the diagram below, but I'm not sure what to do about the inverted logic levels. Basically, I need to add ...
4
votes
6answers
434 views

Handmade timer versus IC

Are there power consumption benefits between a discrete timer: astable multivibrator or some other; and an integrated circuit? I have a time dependent circuit in a project and I went looking for the ...
25
votes
3answers
530 views

What is this unusual LCD controller technology?

Preface: Even if you do not have a definite answer, I would greatly like feedback from anyone who has even seen an LCD using this technology. I recently took apart a Canon digital camera from the ...
0
votes
1answer
32 views

CJMCU-75 — seting the I2C adress

I just got embedded system CJMCU-75 which has LM75A I2C temperature sensor on top of it. I dig into the LM75A documentation and found out that it's I2C address consists of four fixed MSB and three LSB ...
1
vote
2answers
155 views

In a circuit with the TI TPS61165, how was D2 chosen?

Looking at datasheet for the TPS61165, I don't see how they chose D2 - it looks like it will only work if the voltage supply is above 12v due to this diode, but the chip's input range is 3-18v. I ...
1
vote
1answer
56 views

Current split on sn754410 chip and electromagnets?

Here is the schematic, except this uses the L293d I wanted to better understand how does the current split (if it does) between two of these IC chips wired as diagrammed with 2 electromagnets on ...
0
votes
1answer
25 views

Could someone explain attached M-bus master circuit?

Could someone explain attached m-bus bjt circuit in details? Is this a repeater of some sort?
-1
votes
1answer
57 views

PCB house raising through hole pad error

A fab house is raising a strange error on through hole pad connections. In the top layer all connections are made but they are saying the bottom layer is left unconnected. Its a breakout board for a ...
0
votes
1answer
30 views

How to connect TPA7297 S-GND and PW-GND

I've just started making an amplifier for some speakers and I'm completely new to this and couldn't find any information in the documentation explaining it. So I just wanted to know if S-GND and ...
1
vote
2answers
62 views

Determining which diode I need [closed]

I have the following board with the below diode: One diode fails circuit testing and needs replacing, but how do I find out the specification of the diode I should buy to replace it? (it is for a ...
0
votes
7answers
135 views

get many different signals through one wire

I am new here. I want something done, and I strongly believe there is an IC for this job, but I don't know what it is called and I can't get the right words into google. What I want is to take many ...
1
vote
2answers
158 views

How to interpret Vcc and GND on integrated circuits?

I am a little confused about power supply markings on ICs. For example, if I have an IC named U1 stating that Vcc should be 5V, can I connect it this way: simulate this circuit – ...
1
vote
3answers
64 views

Conditioning a voltage using constant current for an ADC range

I wish to make a set of temperature measurements inside a relatively inaccessible box. The measurements can be made using Pt100 sensors - platinum Resistance Temperature Detectors (RTD) with a ...
1
vote
3answers
88 views

Why the stable supply voltage present a ripple after connecting it to the testing board?

I used a power supply to supply 1.8V as the Vdd of the tested-circuit, after I connected 1.8V to the Vdd pad of the testing-board, the originally "clean" 1.8V began to have a ripple (the total current ...
0
votes
1answer
30 views

How to combine demux units and other circuit components in order to obtain a bigger demux?

How can I combine, for example, a number of 3-8 demux units and perhaps other components such as transistors (takes three inputs and has 8 outputs) in order to make a 4-16 demux unit or perhaps even a ...
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votes
2answers
63 views

ECE - Study Guide: Physical Memory addresses how many bytes?

Attempting to do this study guide, but i'm not finding too much help online. Any help is welcome, and a explanation would be nice, as my text book does not describe how to answer a problem given the ...