Questions tagged [design]
The process of creating electronic products, including components and end-user devices.
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How to achieve signal gating with trigger input
I am currently working on a project that generates enable pulses of extremely diverse lengths from microseconds to days and under normal operation will start execution under a trigger input. However, ...
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Buck Converter Design Choice. 232V to 52V and 29.2A to 130A [closed]
Is it feasible to physically design a buck converter with that much of voltage multiplication (232V to 52V) and give an output current of 52A simultaneously?
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Powering and dimming a few hundred light bulbs
I want to power a very large light fixture: it has 273 G4 socket light bulbs. The bulbs I found for the thing are 12 V 5 W ones, incandescent.
So the question is how to power the beast (as it is 1365 ...
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Altium trace symmetry
I am designing a board and the traces look like this:
Is there any hotkey to make the traces be similar? I.e. the vertical lengths are uniformly varying, the distance between the diagonal tracks is ...
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Earthing requirement according to power supply [closed]
I was wondering regarding the requirement of earthing that is it dependent on the Input value of power or not?
If a device is powered using 24V, 1.5A adaptor then is it mandatory to provide earthing ...
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Please verify tube AM radio transmitter [closed]
I am an electronics hobbyist. I designed this tube AM transmitter circuit. I want to ask you, since it's my first designed circuit, if it will work, and if I can improve it.
I am using a PL500 for the ...
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Turn signal detector
I'm trying to figure out the simplest design possible. I want a video camera to activate on my truck when I activate either left or right turn signal. Each side mirror has its own camera. So basically ...
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Hardware watchdog for my ESP32 Board - circuit and design suggestion
i've made my custom board based on LM2596, LM1117, ESP32 with ethernet based on LAN8720. This works without any issue but i want to prevent any type of software issues/hangs using an external watchdog ...
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How to measure the length of element of dual band dipole antenna
I am trying to build a dual band 2m/70cm dipole antenna using a 1/4" copper tube as shown in the image below.
I have following questions around it:
What should be the maximum distance between ...
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Mixing light from multiple leds
I'm trying to design a device that produces visible light with a somewhat controllable spectrum. My goal is to measure the human eye cone cell responses by switching between two different spectra and ...
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Altium Schematic - save all sheets as ASCII schdoc
I see a way to save as in Altium to save the sheet in ascii format. Will this save all sheets in a hierarchical design or flat design?
https://www.altium.com/documentation/altium-designer/sch-dlg-...
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What is the appropriate name for a parabolic antenna with a "center mounted feed"?
How would a parabolic antenna with a "center mounted feed" be called? Below are some images which illustrate the type of parabolic antenna I'm referring to.
According to wikipedia these are ...
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NAND gate output doesn't change to logic 1 when expected
I've been assigned to make a breadboard from a circuit and then take its NAND implementation and build that on the breadboard.
Logically what I've done seems to me like it should work. Essentially ...
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How can I place components of my amplifier design between the pads of an SMA connector?
I want to place some of my amplifier components between the pads of an SMA connector.
Should I change some design rule or is the problem in the choice of the right footprint?
I added an image of my ...
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Connecting the grounds on a non-isolated DC/DC converter
For isolated DC/DC converters, I know that it's a good idea to have two different grounds on both sides and that we should avoid to connect the two grounds together as the isolation is useless when ...
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Passive equalizer design
I have circuit feeded from a 3.5 mm jack through a JFET common-drain buffer then i need the filter this audio input to pass bandwith 400-19600 Hz. I can do this with RC bandpass filter but then I need ...
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Looking for advice on a 12V relay circuit with ESP32
I've made the below circuit on a custom PCB and it doesn't appear to work as intended. For whatever reason, I'm seeing only ~3.8-4V on the coil pins of the relay rather than the expected 12V needed to ...
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Where can I find large thru-hole heatsinks like this? [closed]
I'm doing a project with an OPA541 amplifier, and I need to find a heatsink similar to the one in the pictures:
But I only found small ones with a screw hole and legs for soldering, none of the large ...
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Time optimum controller
I have a question regarding time optimization that I would be very grateful if you could guide me on it. The question is moving a car/mass with nonlinear forces acting on it from point A to point B ...
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Simple e-stop circuit
I have a motor controller that has an electronic stop function where if I put 5v on a pin the motor runs. Once that 5v gets interrupted (goes to ground) the motor stops immediately.
On my device I ...
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How to connect pads to split plane (internal plane) in Altium CircuitMaker
My problem:
I use Altium CircuitMaker (Version 2.1). I am designing a four-layer PCB; two signal layers (top and bottom), and two internal layers (GND and PWR).
I do not connect anything (not any pads ...
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Moving BGA pads 0.01mm and making them smaller to work with JLCPCB capabilities
JLCPCB has requirements that mean some BGA packages can't be used because of minimum via size and minimum track spacing and sizes of pads to vis etc.
To overcome this I came up with an idea that in ...
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Does DesignSpark not have schematic/pcb foward/backward update?
My new job has me working with some engineers from Italy, and they are using DesignSpark to create a in-house machine for testing our components.
My mind is currently reeling from two questions.
...
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Design of transistor amplifier for nanosecond signal (with NPN transistors)
For a project/learning experience I want to design/build an amplifier.
The signal I’m provided has an approximately 1ns pulse width (duty cycle of 1%) with a peak of 2.2V and a repetition frequencyof ...
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Why is the actual position of things in a circuit diagram not considered? What is the type of diagram that cares about the ordering?
After looking at several circuit diagrams and their actual implementation, I found that the position of the parts is not considered in the diagram. Is there any reason for this?
If all parts are ...
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Why do we not see multiple or parallel DC PSUs?
A friend mentioned that his home router had blown its 12V PSU recently and had to be replaced.
That got me wondering - Servers and routers can have isolated dual PSUs for exactly this condition, but ...
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Switching between two power sources with two NMOS FETs
I need to create a test setup to do a long-term overvoltage test on a device. The specifications that need to comply with are given below:
As you can see, I need a rise and fall time below three ...
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Parallel connection of V7805-2000
I am using V7805-2000 in my design. V7805-2000 is capable of producing 5V @ of 2A. Can I connect two V7805-2000 in parallel to get 4A?. In this datasheet it is mentioned as "No parallel ...
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Do hardware design engineers design circuits from scratch? [closed]
I'm new to hardware prototyping and circuit design. Where do ardware engineers look for reliable circuits that would work for the first time of prototype?
I know this is a general question. I'm ...
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Sizing a divider network for a buck regulator
I am (re-)designing a buck regulator circuit, after having done the calculations the first time according to the manufacturer's datasheet.
My problem is that I should be seeing 3.3 V on the output, ...
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Designing BJT that's beta value is 120
I want to design a BJT that's beta value is 120
Following this picture can I say that the components of the base current are like this?
J(B) = J(pE) + J(R) + J(RB) - J(G) - J(pC0)
I want to design ...
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SMPS power supply - fuse resistor calculation
I'm designing a TNY288-based SMPS. My transformer input inductance is 931μH. I'm using a 320V MOV and have a doubt about the fusible resistor calculation.
The output load is 12W, the input capacitor ...
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Help with open supply diagnostics on SENT output with Micronas HAR3735
I'm trying to develop a way to diagnose an open supply pin on my sensor board using only the SENT pin from the sensor board in the attached schematic. The circuit would be placed on the sensor board ...
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I am trying to design a basic CMOS Image sensor
I am new to electronics so I might be doing some bad mistakes on my design but anyways,
I'm trying to build a CMOS Image sensor using Proteus, and I couldn't find some basic tutorial to follow, Yet I ...
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Design of feed gap of a dipole antenna
I am unsure of the formula used to calculate the feeding gap of a dipole antenna. When I go through some research papers, the formula given to calculate the feed gap of a dipole antenna is L/200. I ...
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Improve conceptual intervalometer for rotating potted plants
I'm trying to avoid having my plants tilting or otherwise looking bad after only getting sunlight from one direction. To solve it, I want to make the pots rotate.
I'm trying to design a cheap, stand ...
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How do I size conductors to a three-phase induction motor to account for voltage drop?
Suppose I have a 480-volt nominal electrical distribution system, and a 460-volt nominal motor. Assuming +-5% variation in the source, it could get down to 456 VAC. I've seen references to motors ...
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Is it viable to short pitch different windings by different degrees of short pitching in the same synchronous generator?
In the design of a synchronous generator one can chose to eliminate or reduce harmonics at the expense of emf.
The pitch factor \$K_p = \cos(\alpha/2)\$, which is always less than or equal to 1, ...
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Why is digital transmission more efficient than analog transmission?
it is possible to send more data through a given circuit using digital rather than analog transmission
Slide says the above thing but I am not really able to grasp this. How can we send more data in ...
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Heatsink needed to keep my resistor from damaging due to heat
I am looking to find an appropriate range of heatsink selections to maintain my resistor from damage due to heat. I am using a flat plate (SS) resistor from ARCOL (TFBR900). It is rated for a 900 ...
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Ground drone schematic and pcb review
I am creating a small ground drone and have come up with the following design.
To control the motors I use mosfets driven by proper drivers, while I also placed a gps module (L80-M39) and an ...
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Is this design correct? How can I improve it?
I designed this circuit to control a total of 4 motors via a web interface hosted on the ESP32.
The bridge is simply a 0 ohm resistor needed to activate the motor driver.
The L80-M39 is an integrated ...
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Designing a push-pull amplifier
The exercise is to calculate \$ R_1\$, \$ R_2\$ and the gain for small signs of the following circuit, which is supposed to be a audio amplifier:
And I have the following information:
\$ R_L = 8\...
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STM32 PCB design
I am going to use STM32F407VG in my PCB design. I have never done it so that I don't know how to do it.
It's my first time using STM32 so I don't know how to design external capacitor and crystal. I ...
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Regulate higher voltage for mcu and tracking pre-regulator
I am currently designing a lab bench power supply using the LT3080. It will have an input of 18V and an output of 0-15V and 1A. I am going to use an Atmega328 to control the limits and a display. For ...
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Detect Ethernet cable connection
I would like to know if it possible to detect the connection of an ethernet cable when it is connected to my PCB. Ideally I would like to implement a circuit that signals to my SOM that the ethernet ...
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design an embedded system with ac6905a bluetooth IC [closed]
I am a beginner in designing electronic boards and PCBs. I want to design a board, somehow, this board should be able to receive surround sound through a microphone and send it via a Bluetooth IC. The ...
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How to calculate the Vout/Vin in this circuit? And how to write this circuit in a simulator like PSPICE? (buffer)
This question is about this circuit, a signal conditioning circuit.
I am trying to the discover the Vout/Vin, I think it is one but I can't demonstrate it. I can't figure out why these resistors and ...
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Protection circuit module for not only “deep” discharge protection
I have to ask about protection circuit module, like BQ297xx, AP9211, AP9101 etc.
As I see, protection circuit module is used to protect li-ion cell from deep discharge - so if the li-ion cell has, for ...
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What is this style of PCB called? It's single-sided, with lots of orthogonal jumpers and strange "horns"
A hobby of mine is to take apart discarded electronics -- to see what I can learn. Sometimes, I'm just puzzled.
I've seen this style in name-brand stuff, meaning high quantity, like radios and vcr's. ...
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