Questions tagged [design]

The process of creating electronic products, including components and end-user devices.

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4answers
513 views

Design a class AB audio amplifier

I am required to design a class AB audio amplifier to deliver 10W to an 8Ω speaker as shown, but I don't know where to start. The bandwidth is to cover the range from 20Hz to 18kHz. Input voltage is ...
2
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0answers
113 views

How dangerous are magnets to common electronics? [closed]

I'm working on a fun little personal project, an electronics knickknack I'm hoping to fiddle with, like a fidget spinner. I want to use reasonably-strong magnets in the design, capable of holding ...
0
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1answer
48 views

How to create a circuit which is sensitive to inputs change and results to output change? [closed]

Suppose that we need a circuit with 4 inputs A0-A3 and 1 output out. when one of the inputs changes (for example ...
4
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3answers
125 views

Why is an analog circuit more susceptible to noise than a digital one?

I have read a lot of information on the internet, but did not find a straight easily understandable answer. Could someone just explain it clearly for me, please?
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0answers
47 views

PCB layout, pitch width

What is the standard maximum copper thickness for minimum pitch size of a SMD component in a PCB? For example, what will be the maximum copper thickness for a pitch of 0.65 mm? Or is there any ...
3
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0answers
30 views

Getting parameter from hierarchical block LTSpice

I know how to pass parameters into a block, but I can't figure out how to get parameters back out. For example, I'm passing params into a block with: Within the block, these parameters are used to ...
3
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3answers
99 views

Designing a filter: does the order i which we cascade the sections matter?

So I am designing a 4th order lowpass filter using two biquadratic sections. I decided to split the gain evenly between both sections. After some calculations, one of the sections has a quality factor ...
0
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1answer
31 views

Designing of a stereo camera concerns

I'm planning to design a depth camera. I'm considering to use the following Camera with the following specs: https://www.waveshare.com/wiki/IMX219-83_Stereo_Camera ...
0
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4answers
42 views

Transformer Design Calculation

What does "For secondary 4 wires of 24SWG in parallel" means? Does it mean I take 4 wires and wound them 47 times in the primary side?
1
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1answer
49 views

How to lay out Gerber files for flex-rigid pcbs

I want to move to flex-rigid PCB design for our product, to eliminate need for the FFC cables we currently use. I have found vendors providing this service but I cannot find any information on how to ...
0
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1answer
32 views

Wide Range Input DC DC Buck Convetrer Design

Im having trouble understanding how i can achieve a constant output voltage with a varied input voltage. I know how to design a buck converter with a constant output when the input voltage is fixed ...
0
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1answer
45 views

Are the AND-OR and OR-AND forms of combinations exactly sum-of-products and product-of-sums?

Are "the AND-OR forms of combinations" and "sum-of-products" exactly the same? Are "the OR-AND forms of combinations" and "product-of-sums" exactly the same? ...
0
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1answer
57 views

Balancing a stick using two different designs and comparing both

I want to understand which feedback systems are in general preferred over another model (that I'm going to show in image),so first we take a example of a particular system (here stick at 90degree from ...
2
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3answers
137 views

Four Layer PCB Design

I'm new designing printed circuit. I designed some 2 layers PCBs (not too complex). I would like to know maybe a list of concepts that I need to check in my PCBs, or to know. I would like to jump to 4 ...
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0answers
22 views

Designing 125 KHz RFID Rectangular Spiral Antenna for FPC

Am trying to design a rectangular loop antenna similar to this paper from Melexis for an HF antenna design, however i want to implement something similar but for 125 KHz rectangular antenna. Now using ...
0
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2answers
88 views

Effect of parameters on feedback system and some confusion regarding it

I am confused in some basic terminologies of feedback system and its requirements 1.what is difference between actual input ,reference input and disturbance input ? 2.is reference input setup by ...
0
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0answers
34 views

Building a 2 bit comparator tips and tricks with truth table

Build a 2-bit comparator using either two 74151 8-to-1 MUXs or two 3 to 8 binary decoders. Additional gates such as AND, NAND, OR, NOR, inverters can be used. So I got this question while coming ...
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0answers
95 views

What is the benefit of a male output connector on a powersupply?

I saw several power supplies which use a male output connector. For example the Meanwell OWA 90E series uses a XLR 4P or ...
0
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1answer
61 views

Is transformation from one state representation to other state representation changes the transfer function of the system

I was reading about designing of controller by state state model from book by Norman S. Nise And author suggested that if state space representations given in problem are of form other than phase ...
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0answers
44 views

Controller design

I was reading controller design using State space model from book by Norman S. In that topic, the author suggested to design controller by converting given state space represention into phase variable ...
1
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1answer
72 views

PCB Layout: Variant A, B or C

I've just started dabbling with hardware design and I'm a little confused. Which one of the following variants for the battery protection circuit is the most optimal one? I've been trying to follow ...
0
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1answer
67 views

Overlapping GND and PGND on different layers of a PCB

I have a 6 layer PCB that is populated on both sides. The PCB mainly consists of power supplies (PoE, battery charger, buck converter) and a uC and a controller. The Layer stackup is: TOP Signal - GND ...
0
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1answer
87 views

How to remove an inductor after getting signal from it?

In the circuit that I've designed, I get 3 different signals and I process them via a microcontroller. 2 of them are from different inductors and 1 of them is from kind of a button. So, my question is ...
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2answers
90 views

Why doesn't this phase shift oscillator work?

I have to achieve 100 MHz oscillation frequency. To startup the oscillation, V2 is modeled as a step voltage source with 10V final value. But I am not getting any oscillation when I try to simulate ...
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0answers
47 views

Polygon pour in polygon cutout?

I'm designing a 4 layer board in Altium Designer 20.0.1 with an STM32F103RBT6 and am doing the 8MHz and 32kHz crystal layouts. According to the recommended layout each crystal is supposed to have a ...
1
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2answers
91 views

High frequency PCB layout

I am designing a printed circuit board with Sigfox IC ATA8520 from Microchip. The max frequency I have worked with is 20 MHz for PIC microcontrollers. I have been searching for design considerations ...
0
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1answer
72 views

Reading data from PCB using LED light

I have a PCB that controls some doors and gates at a facility. I need to determine the status of said doors/gates. There are no I/O ports at the PCB to read from, and soldering some probes to it is ...
-1
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1answer
52 views

Looking for a validating bill module [closed]

My team and I are working on a project which deals with money management. Basically we need a module that could count and verify the authenticity of bundles of bills. For the moment, we only found ...
0
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2answers
70 views

going from 2AWG wires down to 14AWG

So I basically have a 2 AWG power wire, but I want to end up with about 5 or 6 14AWG wires so I can put the power through a connector. Does anyone have methods of going from a 2AWG to multiple 14 AWG ...
1
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1answer
85 views

Help designing a motor control circuit

I'm currently trying to develop a circuit to eventually transfer to a pcb and I'm seriously stuck constructing it, this is my problem: The circuit needs to rotate an 8 segment circle so that once a ...
2
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4answers
140 views

What's the difference between Chip families

I've been trying to follow Ben Eater's 8 bit computer design (https://eater.net/8bit) and I've manged to build something that broadly works but it's not very reliable. Sometimes modules in the don't ...
3
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1answer
158 views

What is this circuit called?

This is a circuit I made to create a high signal when a switch is opened and closed. The duration of the signal can be adjusted by changing the capacitors and resistors. It is also low powered when ...
0
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3answers
84 views

Generation of triangular wave from passive networks

I wanted to generate a triangular wave from a pure sine wave using only passive networks (RLC circuit only.) I wanted to realize such a network and at first I thought maybe the Fourier transform (of ...
0
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1answer
41 views

Is it possible to make a keyboard with “Game Controller” style printed circuit boards and buttons?

For a long time I've wondered if it's possible to make a keyboard with PCBs similar to the ones used in NES controllers or just video game controllers in general. If it can be done with keyboards it'd ...
0
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1answer
38 views

Question about capacitive sensor designs with direct touch to copper or aluminum

I've seen some DIY capacitive touch sensor projects where the sensors themselves are strips of aluminum or copper soldered to a non-grounded wire, where the user touches these strips directly with ...
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0answers
20 views

How to use charging adapter to charge Lipo battery through a female USB C receptacle?

I have successfully created a solar operated (7.4 V 20W PV panel) battery charger to be able to charge my 3.7 V 1 cell lithium battery practically for free! I have attached my schematic below for ...
2
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3answers
154 views

Amplifier design help

I am designing a two stage Amplifier for class, and I had asked for help before on the forum which helped a lot. Input is a 1v sine wave. My design was for a 5 voltage gain however I am only seeing 2....
1
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1answer
73 views

Designing an instruction set for a homebrew computer

I'm going to begin the adventure of building an 8-bit homebrew computer. Right now, I'm considering the instruction set. SAP-1 seems a bit too sparse, so I'm designing my own. Some facts: My primary ...
0
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2answers
50 views

Is LC filter at ESC input a good idea?

A wall climbing robot's controller board distributes power to a 150W brushless suction motor, 2x 30W brushless wheel motors and precious digital electronics (Intel NUC + STM32), the latter is ...
1
vote
1answer
45 views

Arduino Prototype to Finished Product

I have seen this question asked before but it was over 8 years ago and I assume things must have changed since then. Basically, I am working on a personal project that I would like to see if I can ...
1
vote
1answer
50 views

Mosfet Amplifier design help

I am currently designing a MOSFET common source amplifier for my electronics lab class. My issues is that currently I am unable to obtain a gain out of my current circuit design. I am using a 2N7002 ...
0
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0answers
48 views

Peltier questions [duplicate]

Can you use both sides of a Peltier module to distill water? Using one side for heating and the other side for cooling? If so, what type of Peltier module do you need and can you make it solar powered?...
0
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1answer
31 views

Review of system design of motor controlled by micro-controller with rechargeable battery

I trying to build a circuit to control the motor using the microcontroller, supplied by the battery that is rechargable. I identified the some of the components i.e. Battery PMIC, LDO, Motor Driver ...
2
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1answer
96 views

Should I use an isolated DC-DC converter?

I am designing a controller pcb for a wall climbing robot, which uses a ~150W suction brushless motor to stick to the walls and two smaller ~30W brushless motors to move around. The system consists of ...
0
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2answers
80 views

Design decisions about computational hardware for small mechatronics project [closed]

I've recently started learning electronics/mechatronics. As part of my studies, I've been reading about devices such as RaspberryPi, Arduino, etc, and I'm interested in experimenting with such devices....
0
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1answer
40 views

S-parameters vs device model

Many vendors provide both S-parameters and simulation models for their devices. Having encountered device models that when simulated, don't result in exactly the same S-parameters as the touchstone ...
0
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2answers
52 views

Systematic ways to design a finite automaton whose input-output function or relation is a given one? [closed]

Given a function or relation, are there some systematic ways to design a finite automaton whose input-output function or relation is the given function or relation, assuming there is at least one such ...
0
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3answers
58 views

How can I prevent microwave radiation absorption by a camera lens/electronics inside the microwave (behind the shield)?

Let's say I put in an endoscope like camera with the lens at the inside edge of the box and the wire behind metal sheet. Here's a mockup: Possible idea: The lens is behind a holes but the hole is ...
1
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0answers
70 views

I want to design a joule thief circuit with input of 2mV and output 1.5V

I want to design a joule thief circuit having an input of 2mV and output of 1.5V. I searched for low input joule thief (JT) and I found that by using ALD110800/ALD110900 (they have zero threshold ...
2
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2answers
65 views

How to fix common error causing multiplexed LED segments to flash and dim

I bought an electrical engineering book and was surprised to see the following figure showing how to use a microcontroller to multiplex 4 LEDs using only 4 pins: This seemed right, logically, but ...

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