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Questions tagged [component-selection]

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

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I am trying to wire a laser controller to two different power supplies. The contacts I am trying to wire to are shown here: I correctly identified the connectors that mate to the contacts in the laser ...
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I am trying to figure out what type of female coaxial connector this is I tested an 50 ohm impedance SMB connector, and it almost fit, but it was not correct. The outer diameter is about 3.5 mm. ...
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I am working on a product for one of my clients that included two MCUs (STM32h755) on the same board working together and he requested both MCUs to be run on the same time "same clock", to ...
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I am working on an electronic Santur (a Persian hammered dulcimer) and need help designing an impact-sensitive sensor using the MPR121 capacitive touch controller. My goal is to detect both the ...
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I'm designing a circuit that contains a switching regulator that will need to cope with a transient peak current of around 700-800 mA at startup time. I don't know how long this transient exactly ...
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The input can be any (non-negative) voltage up to x Volts, the output should indicate whether the least significant digit of the integer part of this voltage is even or odd (decimal places are not ...
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I am trying to build a bias current sample stage for a Scanning tunneling microscope. To do this I am using a 8814 16 bit DAC (https://www.ti.com/lit/ds/symlink/dac8814.pdf?ts=1739180478656) and ...
meams 454's user avatar
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I am attempting to design a power supply around the Silergy SY8368A step-down regulator chip, and would be very grateful for validation (or refutation) of my ancillary component selection and/or ...
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I'm looking for a bottom entry SMT slide switch. After much research, I'm wondering if such a thing even exists. Here is a bottom entry tactile switch that illustrates the mounting style I'm looking ...
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We have an LED module that's 5.6mm x 3.3mm x 1.3mm (LWH) that has gone EOL. Our solution was engineered to have a common plane at the top of multiple components so a plate could be install and potted ...
pennstump's user avatar
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I am trying to create an electromagnet but struggling to understand the best core material for it (from among-st so many options available). My background is not Electrical but CS so I want to ...
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This is the relay used. R,C and Varistors are through hole components. Is it better to remove the snubber+ varistor since not useful or is it worth to keep it? If it's better to keep it, are the ...
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I am pretty new to electronics but need to work on a project requiring me to construct a circuit that can change the brightness of LEDs using a touch sensor. I have constructed my LED panel (12V ~0.5A)...
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I'm used to choosing SMD resistance package size according to the power they will need to dissipate (+ a margin). i.e: 0603: 0.1W, 0805: 0.125W, 1206: 0.25W, 1210: 0.5W, like you can find here. But ...
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I am reading Jim Williams' "Quantifying Silence" (Analog Devices/Linear Technology Application Note 124): in this note he describes an ultra-low noise preamplifier designed to measure the ...
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I am repairing a power supply for a monitor and need to replace a diode, the one is question is a B5100C from Diodes Inc. I have an Onsemi FSV15150V, would this be OK as a substitute? From what I can ...
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My Hikvision door station got shocked during a storm. I can see that a couple of SMD components got burnt and turned black after that. There's a bunch of components on the board and all of them seem ...
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I am using WEBENCH from TI for the LM2596SX-5.0/NOPB buck converter. It is a Cf cap in the "BILL OF MATERIALS" that doesn't appear on the schematic. Do you know where is that from?
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I am using the LM2596S-5 buck converter with a +12V input from a Turnigy Nano-Tech 2200mAh 3S 25C LiPo battery (with an XT60 connector). My goal is to achieve a 5V output with a maximum current of ...
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I have a motorized potentiometer, labeled Z PRM 50KB-4 I believe I have found a datasheet for the component which contains the following diagram: If I want to use the component as a voltage divider (...
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After discovering my misconception about the temperature range of the MLX90614-DCI version—which is actually -70°C to 270°C rather than the -70°C to 380°C I initially believed—I decided to switch to ...
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I have a 200 W, 12 V auxiliary light that I intend to mount to the rear of my car. I only want this light to switch on when there is power going to both the tail lights (headlights are on) and the ...
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Consider the following circuit: simulate this circuit – Schematic created using CircuitLab It is used to supply a 6VDC device (represented by R3) with a 12V car battery. More context on why this ...
Juicer's user avatar
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I am currently using the following power selector circuit (based on this Microchip app note) to switch between a 5V (5V5A) supply and a Li-Ion 3.7V battery (...
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I want to know how to dimension a bridge rectifier. As an example,in a SMPS, the bridge rectifier has repetitive peak current, up to 10A at rate of 100kHz, but in a small period of time, like a small ...
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I have been struggling a lot with a MAX485ESA IC I bought from aliexpress. What I want to do is replace the component from a rs485 module. For some reason they don´t work and I was wondering if anyone ...
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I have a 1500 W magnetron. What diode and transformer can I use for it?
Erfan Mozafari's user avatar
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I am using a pickup truck starter motor to build a small crane-like loading arm. I want to control the direction of rotation using an H-bridge, however, when I turn on the mechanism the motor has a ...
R Ram's user avatar
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4 votes
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I'm struggling to understand what it means for a DAC to have a Multiplying Bandwidth of 200kHz. Does it mean that the max frequency component in the DAC's output cannot exceed 200kHz for reliable ...
Ninja Ron's user avatar
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I am recreating a proprietary PCB, which fits inside a plastic casing. It has these header pins with a very low profile plastic dividing piece (see photo with comparison to "standard" ...
Mark Tickner's user avatar
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In my circuit I have a discontinued transistor listed here: If I can not select a transistor rated 350 mA, would a change to the collector current pose any issues that may need compensating in my ...
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I'm overwhelmed by all the MOSFETs available. I'm trying to duplicate the effect of an SI2302, so an N-channel MOSFET, and specifically one that can be operated by an ESP32 logic level input (I think ...
Merlin83b's user avatar
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I have a circuit for detecting frequencies in light noise. Its a reverse bias mode circuit where the photodiode is coupled to a trans-impedance amplifyer circuit via a ceramic capacitor. I use it to ...
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I need a compact speaker suitable for a 16mm diameter tubular enclosure. The speaker must be capable of playing voice audio clips with sufficient clarity and volume to be easily hearable and ...
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I am designing a LLC half bridge charger. I am going to use a microcontroller to control the switching frequency, with feedback from the output to smoothly control the switching requency. I don't ...
MSB's user avatar
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Background While resistors are obviously non-polarised, from a manufacturing point of view they might not be rotationally symmetric: specifically the labelling of 0805 SMD resistors. My board was ...
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I am working on a pcb that has to have a CPU with capacitors between its gnd and vcc pins, other components like sensors also have to have capacitors connected to them for whatever reason indicated ...
maths soso's user avatar
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2 votes
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How can i get the Vgs(on) if the datasheet like the VN10LM don't have that specification. I only can se the values of Vgs(th) and Id(on), but I still mess the Vgs(on) to resolve the ecuation K = Id(on)...
Clarence Gabriel Reinoso Javie's user avatar
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I want help with finding Schottky-diodes to replace the ones on the PCB bordered in the red rectangle. They are probably non-working as they failed the continuity test with a multimeter. I have two ...
Max Frambuesa's user avatar
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I need help identifying this component. It is used to attach wire or ring terminals to the board. The screw is an M4x10 for size reference. The pad width is roughly 10mm. It seems to be a "U ...
emd014's user avatar
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It looks like a rectifier with "pec" as manufacturer and 149k as identifier. I am trying to look up the datasheet.
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I'm looking for component package names that are known to provide conductors on (nearly) 50-mil spacing so it fits well on a 50x50mil SMT protyping board. I know SOIC are 50-mil, and even SOT-223 is ...
KJ7LNW's user avatar
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2 votes
4 answers
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I am on a college project where we make F1 style cars for competitions. Ours is an electric car using a 588 V(maximum) battery to drive the motor. The inverter has a capacitance that, by the ...
Gabriel Corrales's user avatar
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I am making a heating device prototype using an M12 battery and a 12 V diesel glow plug. As you might imagine, heat is a problem. In this case however, because of my set-up, the heat problem I have is ...
Rick DuRapau's user avatar
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General line of questioning: When looking at transistor, are there any standards/conventions of how they are labeled? Is it manufacturer specific - and if so, how would I identify that mfr's ...
JCReardon's user avatar
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I'm currently using the RFD900 SMD version for an avionics bay for long range GPS capabilities. I have read the datasheet and saw this: The RDF900ux(-SMT)/868ux(-SMT) modem has two antenna ports and ...
Lucas Webb's user avatar
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1 answer
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It's been few weeks I'm searching for a substitute for my MAX865EUA-T (datasheet). I need a component able to do a +10V/-10V output with a +5V input, this component was perfect for me since it's ...
Bibibou's user avatar
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I am working on a high-power buck converter. This converter will be powering a purely resistive load (it’s a literal resistor – a heating element). However, I am having some issues deciding how many ...
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I am looking at the availability of the pictured component on LTspice and cannot find it when I type it in the component library search. Please let me know the component symbol name or if I need to ...
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I am trying to get a PCB fabricated and assembled from PCBWay for a project, but I have little experience with electronic components. The project schematics don't have specifications for some of the ...
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