Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [component-selection]

All related to methods to select the correct components and/or component values to specific applications

0
votes
1answer
31 views

3.55 mm jack wiring

I have two inputs in my circuit which I am feeding using the two jumper wires. I want to use a 3.5 mm female jack in place of those jumper wires. Right now I have this 3.5 mm female jack but i don't ...
0
votes
1answer
27 views

How to Choose Proper Components for Class D Amplifier Circuit

Hi I am designing a class B amplifier PCB using the TPA3122D2 amplifier chip. I am planning to base my circuit on the schematic from the evaluation board (see below). I have tried building out this ...
-1
votes
0answers
56 views

replacing capacitors

C6 and C8 are ceramic capacitors. Can I replace them with tantalum capacitors?
0
votes
0answers
32 views

Material selection for conductivity electrodes

I was wondering what kind of properties i should be looking for when selecting ideal materials for electrodes in a conductivity sensor measuring the conductivity of liquids (1,1,1,2-Tetrafluorethane). ...
4
votes
1answer
184 views

Moving brute-force search to FPGA

I am currently working on a scientific hobby project about computing the error detection capabilities of CRCs. Unfortunately the C++ code used for such computations has up to years of run time on ...
0
votes
2answers
61 views

How to calculate resistivity from this cell design?

I was wondering how/which area and distance values are calculated for a concentric 2 electrode conductivity sensor (below) when trying to calculate the bulk resistivity of a fluid. The blue is the ...
1
vote
1answer
59 views

Finding the resistivity of high resistivity liquids

I'm working on a project to determine the resistivity of 1,1,1,2-Tetrafluoroethane which is estimated to be around 10^14 ohm-cm. The problem is, the most sensitive commercial conductivity sensors for ...
0
votes
1answer
55 views

74HC589 - stock lead times are high, looking for alternative parallel to SPI tri-state chip for ESP8266

My prototype was going to use 74HC589 as a parallel to SPI interface for ESP8266-07 MCU. They are in short supply for quick delivery at the moment. I am asking for suggestions for a similar chip ...
0
votes
4answers
82 views

How to Turn off a PIC Microcontroller in high capacitance circuit?

Below image is the input voltage VDD to PIC16F18326. I am turning off (Switching off the mains supply) my circuit at point A (see image). Due to large capacitance at load, which is required in my ...
1
vote
1answer
76 views

What's the difference between these varieties of octocoupler? [duplicate]

It looks like ON Semi makes a bunch of different kinds of optocouplers for various applications. The array of choices is kind of bewildering. What, exactly, is the difference between an optocoupler ...
8
votes
1answer
368 views

Is C0G a synonym for NP0?

This question is in the context of a production environment where part numbers and change notices are strictly controlled, and any alternate manufacturer parts under an internal part number must be ...
0
votes
1answer
28 views

Cordless vacumn charger rating calculation

I got a cordless vacuum whose charger got damaged and I found a "close enough" replacement. What could be the new charging performance that I can expect or how can I do a calculation to determine the ...
1
vote
1answer
63 views

Questions on Inductor Selection guide from TI [closed]

I have been researching on Selecting inductors for Buck Application and came across an Application report from TI. I have few questions which are listed below: On ...
2
votes
1answer
96 views

Need some help designing a mains frequency converter (220v/50hz input, 220v/60hz output) for <$200USD

My main limitations here are with the amount of power needed, and of course the price. What I'm trying to do is to run a clothing dryer from the USA in another country, without burning out the drum ...
2
votes
1answer
72 views

Help Identifying a component for PCB repair

I'm helping a friend by attempting to repair this display PCB. It uses 24vac input and he accidentally hooked it up to 120vac. I am trying to identify the two components in this picture under the ...
1
vote
2answers
224 views

Can a thermal fuse of a higher rated current be used safely?

I want to replace a 115°C 250V 2A thermal fuse used in a fan motor. The only fuses available locally are 115°C 277V 15A. Can I use the higher current rated thermal fuse? Since it is a thermal fuse, I ...
1
vote
3answers
167 views

Reversing P-channel mosfet for polarity protection component selection

Situation: I'm trying to implement a reverse polarity circuit using a p-channel mosfet and a voltage divider using a resistor + schottsky diode. More information here if you need a refresher. The key ...
6
votes
4answers
485 views

Choosing an FPGA based on ADC sampling rate

I have a project involving an ADC sampling at 500 MHz. I need to take this ADC data and boil it down into something a cheap CPU can process. I believe this is a good application for a low-grade FPGA, ...
1
vote
1answer
41 views

Resistance transform

Is there a circuit either passive or not that can transform the value of a resistance with a fixed ratio ? For example if the input resistance to the circuit is 5000 ohm and the ratio is 50:1 , the ...
0
votes
2answers
74 views

Help selecting a NPN transistor

Looking to use a relay with ardiuno but having a hard time trying to figure out what transistor I need to use, all the tutorials I can find always use an example transistor (usually 2N2222) to figure ...
1
vote
3answers
204 views

Add constant DC voltage to a variable DC input

I'm designing a PCB and I need a voltage rail, roughly 3 volts above the main input (of 3 - 30V). This rail is to power some CMOS devices, so it won't need to supply much current. Currently I plan on ...
16
votes
2answers
2k views

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 ...
2
votes
0answers
101 views

Identify this circuit symbol with two overlapping circles [duplicate]

I came across some images of schematics and have never seen this component before - what is it?
0
votes
0answers
100 views

I want to make a heating element

I am going to buy a nickel-chromium wire for my heating element. I want to power it with one li-ion battery (20A 3000mAh) Intuition tells me that 84W (Draining the battery to its limit) might be ...
0
votes
1answer
35 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 ...
0
votes
0answers
66 views

What characteristics should I look for when choosing a Zener Diode as a voltage limiter?

I am trying to use voltage limiting zener diode for a MOSFET gate in the following oscillator circuit . (related to this question) What characteristics should I look for when choosing a Zener Diode ...
0
votes
1answer
77 views

Design an SMPS to provide 5V – Transformer [closed]

I'm trying to design an integrated IoT device that will replace standard light switches. Currently I'm using a Switching Power Supply from eBay: HLK-PM01, just to have an working prototype. Now I ...
-5
votes
1answer
69 views

Efficient electronics components [closed]

Imagine budget is not an issue and you are asked to design the most efficient circuit. With efficient, I mean that the power used to perform the functions is used solely for that and is not dissipated ...
0
votes
1answer
41 views

Is multi channel transceiver capable of receiving simultaneously from multiple transmitters?

We are in the process of designing a system that requires transmission of data from a sensor nodes to receiver at processing node.Later on,the receiver node can send(transmit) certain commands/...
4
votes
1answer
111 views

What are the uses for a water soluble IC socket?

I recently stumbled across water soluble IC sockets after being given a bag of them. While they do dissolve successfully from the board, I can't seem to come up for a valid explanation for why anyone ...
0
votes
3answers
59 views

BU2505FV - Can I use SPI with this part?

I am planning to use the BU2505FV DAC in my design and to communicate with it using SPI. Is the 3 Wire interface described in the datasheet compatible with SPI? The DAC expect 14 bits to configure ...
1
vote
1answer
61 views

Reverse Search NTE

Is there a way to reverse search the NTE site? I would like to plug in an NTE part number and see the equivalent vendor components. This would give me access to example circuits and development boards....
6
votes
3answers
126 views

Design of a switchable dual voltage power supply

My project would benefit from power supply with two modes selected by a switch. The 'normal' mode is full voltage (±13.5V) at full current (~5A), the 'high' mode is double voltage (±27V) at half ...
0
votes
1answer
52 views

Which transistor and resistor(s) do I need to hook up the FSA-410BT smoke alarm to Raspberry Pi's gpio?

The documentation for the smoke alarm: http://cms.dsc.com/download.php?t=1&id=16756 When the alarm is going off, this device draws 25mA (max) and idles at 20µA. It's 12v too, and I'm sure that ...
1
vote
1answer
69 views

Strange issue with custom 18650 tester

Ive made my own 18650 cell tester that: Fully charges -> fully drains -> partially charges It takes 4 cells, measured independently of each other. While testing the drain circuits (charging circuits ...
1
vote
3answers
128 views

In the given circuit, will the resistor have current across it?

Since the higher potential is connected to ground, how would the circuit behave? When the ground is removed, it turn out to be a simple circuit. But, upon addition of the ground at point G, the higher ...
2
votes
4answers
716 views

Jitter in 'ppm' and 'ns'

In many datasheets clock tolerance is in ppm and in some other it is in ns or ps. What is the difference in giving clock tolerance in ppm and ns/ps. How it can be converted from one unit to another?
3
votes
1answer
113 views

Selecting an inductor based on schematic

I am trying to integrate a Waveshare e-paper display into my design using their published schematic: It calls for a 68uH iron core inductor, L1. After searching DigiKey for 68uH iron/ferrite core ...
3
votes
2answers
295 views

How to pick a capacitor to adjust loop compensation caused by reactive load?

I do wish to add a voltage regulator between a Li-Ion battery pack and a 36V 220W rated mid drive pedalling assist motor with integrated controller. The caps of that controller have a 63V rating. ...
0
votes
2answers
428 views

import PCB components into KiCAD which are sold in the electronics industry

When drawing a schematic in Eeschema Editor in KiCAD, there is a button to "Run CvPcb to associate components and footprints", so a schematic symbol on the *.sch file can be associated to a physical ...
0
votes
1answer
55 views

First or last value checker component/funtion [closed]

I am trying to make a circuit that can store the first and last value from a series of values. To do this I'm guessing I need a component to determine if it's the first or last value and this is what ...
1
vote
5answers
93 views

Is there an electrical component for something between a button and force sensor? [closed]

I'm currently involved in a college team design project and we're creating a "dance" floor that can be switched on and off by stepping on a plexiglass tile. I'm looking for the best way to gather an ...
3
votes
3answers
218 views

Two mosfets, one digital pin

Im new to use of mosfets. If I was to use two Mosfets with an Arduino, would I be able to drive them both with just one digital pin connected to both mosfet's gates but opposite actions? For example:...
0
votes
1answer
139 views

Extra external components for lm2596 [closed]

Hi guys i have a very simple question, im very new to electronics so keep that in mind. I got an off brand lm2596(eboot brand from amazon), and could not find the datasheet for it. I found ...
0
votes
1answer
118 views

Mass producing my electronics/raspberry-pi idea - What are the steps? [closed]

Could somebody tell me what the rough steps would look like? I think I have a good idea. I have put things into practice, and it's working and so on, but it's very ugly. I guess, first I would have ...
-4
votes
1answer
56 views

How do you toggle a DC current on/off with a input?

I'm new to circuitry and am planning on making a 12V DC circuit soon. I'm currently making plans & getting supplies, and was just wondering if there's some sort of component that would not allow ...
0
votes
1answer
124 views

Id ceramic disc capacitor [closed]

The mither in-law asked me if I could fix the OLD electric moulinex beater... Once open I saw that both CDC's connecting the brushes are broken. I am having trouble identifying them, could you help? I'...
3
votes
0answers
33 views

Successor of VTI's SCP1000 Family of Absolute Pressure Sensors

VTI's SCP1000 product family is a range of ceramic capacitive pressure sensors that have reached the end of their lifespan. It has been suggested that certain sensors designed by others (like Bosch ...
0
votes
1answer
95 views

Selecting the proper mosfet

This is my first time asking a question here, so please be gentle? I understand the theory of how mosfets work, but I'm having a lot of trouble deciphering all of the data sheet terms, to pick the ...
1
vote
1answer
629 views

NEC “MPC 1003C” chip

I am restoring an old ROTEL turntable and have come across a "NEC MPC1003C" chip, acting (I think) as voltage regulator. I can not find any information on the internet. Does anybody know any info on ...