Questions tagged [design]

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

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Is a state machine with a register for return state a good design choice?

I want to design a state machine for one module that have to communicate with another module via a protocol. Multiple states need might endup needing to communicate, State A, State B, State C. they ...
Weijie Chen's user avatar
-7 votes
0 answers
82 views

What to do when you've discovered/invented an electronic solution & it being stolen proprietarily [closed]

I'm asking for the scenario in which someone discovers/invents a electronics solution, but inadvertently shares it online in a forum (perhaps resolving issues with the solution). Then somebody working ...
Tempus Nomen's user avatar
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Determine the transfer function for the Butterworth bandpass filter? (At the Transfer Function Factoring and Sp Substitution stage)

The Parameter $$a_{pass} = - 1dB$$ $$a_{stop} = - 20dB$$ $$f_{pass1} = 10kHz$$ $$f_{pass2} = 30kHz$$ $$f_{stop1} = 5kHz$$ $$f_{stop2} = 60kHz$$ A. Approximate Low Pass Filter Filter Ordo $$n_B = 4.29$...
SKevinAR18's user avatar
0 votes
1 answer
106 views

What is the easiest way to turn 1 kV DC to 10 kV DC?

What is the simplest method for me to take quick 1 kV DC pulses, and turn them into 10 kV DC pulses or higher? What might my circuit look like? Edit to provide more detail: Water rolling down a short ...
user3838548's user avatar
0 votes
2 answers
58 views

How to improve gain for CC-CE-CC amplifier

I'm trying to design my first amplifier; my configuration is CC-CE-CC. My Vcc is 10V and Ic for 3 transistors are 0.5mA. When i designed this, i wanted the overall gain to be 50 times, ( and around 90%...
jajalapeno's user avatar
2 votes
6 answers
2k views

What can be done with all of the extra address lines in a ROM? Why were they designed to have so few outputs compared to possible inputs?

I am a student in an introductory Digital Logic and Computer Systems course. We have been learning about ROMS, but often we just use them to basically just map truth tables onto them. We have been ...
LeBronJames's user avatar
1 vote
1 answer
31 views

Single Source Boost Converter?

I'm trying to power a 5v microcontroller using a 3.6v rechargeable lithium cell. My plan is to do this using a boost converter circuit. However, boost converters (at least from my rudimentary ...
unknowntrajectory's user avatar
1 vote
1 answer
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How to convert the winding of a radial electric motor to a linear tubular electric motor?

There are winding scheme/calculators and tutorials online for conventional electric motors, but I can't find any clear method of wind linear tubular electric motors. For example, this is the winding ...
Fulano's user avatar
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2 votes
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Where do I stop the thick traces?

I am working on making a speed variator which also lets you invert the rotation of a motor. I have run into a few issues however. I don't know where to end the thick traces in my PCB design. This is ...
Abdelkerim El Bani's user avatar
2 votes
2 answers
135 views

Identifying monopole antenna with ground connected coil

I can’t find any information on what this design of antenna is called, it has a monopole wire connected to the signal pin of an SMA connector, the coil is connected to ground. The larger diameter ...
josh eanes's user avatar
1 vote
1 answer
94 views

Would tempered glass be a good material to use within this simple axial flux permanent magnet motor?

I am in the design phase of building a simple axial flux permanent motor, and I am wondering if I should use a piece of tempered glass as both an insulating material and as part of the motor's frame. ...
user57467's user avatar
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4 votes
1 answer
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I'm trying to create a clock. Rate my first schematic design

Hey guys, I'm a developer trying to learn PCB design and advanced hardware design and needed a place to start. I've designed a very basic clock with a Atmel Atmega328P-AU and from checking out some ...
Mustansir Godhrawala's user avatar
4 votes
2 answers
321 views

Parallel resistors with polarised capacitor

I have been trying to choose the input capacitors for an SMPS and have noticed resistors being used in parallel with the polarized capacitors. Since these designs are for an 800 V system, I am ...
Watermelon_13's user avatar
0 votes
1 answer
51 views

How do I change minimum anular ring in vias for different layers in Altium?

I want to send my gerbers to a PCB manufacturer but its manufacturing capabilities force diferrent minimum anular ring for vias in different layers. For outer layers, its 0.13 mm and for internal ...
Developing Electronics's user avatar
1 vote
1 answer
76 views

Getting temperature dependence for a beta multiplier circuit

I am currently working on designing a beta multiplier voltage reference, and came across this paper. I am slightly confused as to how they ended up with equation (6) after taking the derivative of (5) ...
soccernismo's user avatar
0 votes
0 answers
43 views

Best way to indicate a good ground connection?

I'm working with 120VAC, and I'd like to have an LED indicator light showing that there is a connection to ground (earth). Like the way a receptacle tester does. I could connect the LED between hot ...
Mike Gray's user avatar
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3 answers
99 views

Design of a 50 Hz step-up mini transformer

I am a first-year B.Tech student majoring in electrical and electronics engineering. Currently, I am working on designing a 500 W mini inverter. I have addressed all aspects to reduce the inverter's ...
Shubham's user avatar
2 votes
1 answer
82 views

HC-05 Bluetooth Module CircuitMaker

I am new to PCB design, and I am designing a circuit with a HC-05 Bluetooth module. I'm using Altium CircuitMaker and there are no symbols or models in there for a HC-05 Bluetooth module. Does anyone ...
Vagabond4761's user avatar
0 votes
2 answers
42 views

Simple switch for pneumatic cylinder

I am an automotive machinist and not at all electronics inclined. I simply need a switch that turns on and off for a 5 port 2 position pneumatic solenoid valve I simply need the pneumatic cylinder it ...
Donald Pyle's user avatar
2 votes
0 answers
36 views

Why is capacitance CdB calculated like this? (Design of Analog CMOS Integrated Circuits- Behzad Razavi” book Chapter 6 Exercise 6.4)

I know formula CDB=CSB=WECj+2*(W+E)Cjsw. I know how to answer it. But, I don't know how the parameters are derived, not in Tables 2-1. I don't know how to solve the problem. Can you help me? The ...
Patrick Yuan's user avatar
1 vote
2 answers
68 views

Designing iron core shell type transformer

I would like to design a iron core transformer of shell-type design. I have experience with electronics, but have never built a transformer before and would like to start simple, but not so simple I ...
Anonymous's user avatar
0 votes
0 answers
31 views

20V Max Lithium Battery "Charge Maintainer"

I have a gadget that uses a 20V max, LiIon, DeWalt compatible battery. It's detached for charging. A DeWalt charger is used to fast charge the battery. The gadget has a POE ethernet connection. I'...
Dave Thomas's user avatar
3 votes
1 answer
172 views

How to determine voltage level of the ultrasonic transducer?

I am designing the generator for an ultrasonic transducer for a cleaning system and I am not sure how to set the output voltage level. I measured the voltage level of the existing products, peak ...
hax's user avatar
  • 33
1 vote
2 answers
178 views

Why do AVR microprocessors have two ways (paths) to access I/O ports?

I've an ATmega328P. Register Summary Page 275 ATmega328P datasheet. The first address is the I/O address, and the second is the data memory address. I'm going to set all (D ports) Data Direction ...
Amr Elkamash's user avatar
0 votes
0 answers
69 views

Fully isolate digital and analog sections to reduce EMI when driving DC loads with PWM. I2C data corruption

I am working on a mixed-domain portable secret project based on the venerable ATMEGA2560 that will essentially control 3 DC heaters using MOSFETs, communicate with an external controller via UART and ...
Daniel Melendrez's user avatar
0 votes
1 answer
74 views

How to amplify ultra high-frequency signal

I have found some schematics to amplify ≈100 MHz signal, but can't find a schematic for 2.4 GHz and higher, up to 5+ GHz. The main problem I face is that I can't find a transistor fast and powerful ...
AlexGenesis's user avatar
1 vote
1 answer
107 views

Why is the output voltage DC? How can I make the output sinusoid? [closed]

In my design for an opamp, the output voltage is a constant value when I think it should have been a sinusoid. What can I do?
qwerty's user avatar
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1 vote
0 answers
58 views

Automotive EPB switch design - why so complex?

The Land Rover Discovery 3 has an electric parking brake (EPB) - a geared motor and cable assembly that pulls the park brake pads in. This is far more effective than purely mechanical levers of old ...
Ben L's user avatar
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2 votes
6 answers
162 views

How do I communicate between a rotary and stationary part? (on a hobbyist level)

I'm trying to get into PCB design and I'm very new to all of this. I tried doing some research myself but couldn't find anything practical as it'd be too large/expensive. The thing I'm trying to make ...
NoobKing767's user avatar
1 vote
1 answer
33 views

Can I use VSYS output on NPM1100 as input to another regulator?

After designing a power system around an NPM1100 PMIC, we noticed that as our lipo battery decreases to around 3.55 V, the regulation out 3.0 V starts to drop (see graph below). We do have a sensitive ...
tronhawk's user avatar
  • 217
0 votes
1 answer
192 views

Why is the gain in a cascode current mirror controlled by M1 and M2 instead of M3 and M4?

I know from simulations, books, and teachers that the gain (Iout/Iin) of a cascode current mirror (shown in the picture below) is controlled by relation (W/L)_2 / (W/L)_1 instead of (W/L)_4 / (W/L)_3 ...
Taela Shanthi's user avatar
0 votes
1 answer
81 views

Transformer magnetics design

In transformer design, can someone help me understand how the no load flux is relevant to the transformer efficiency? What design parameters put constraints on the maximum core flux? Let's suppose I ...
dambi rambi's user avatar
2 votes
0 answers
68 views

Design a 12 V battery pack for portable electronics project [closed]

I am doing some electronic project for a portable escape room business that I am running with my wife, the project are basically running or Arduino to take some inputs and switch on a 12 V solenoid ...
AHMAD Q ALBASRI's user avatar
1 vote
1 answer
86 views

SSR with PCB design improvements

I have worked on this project of my own so I need to confirm that it will work Its a simple SSR with max. current rating of 20A (normal use will be around 13A) I use 40A TRIAC just for safe side(also ...
realprocess's user avatar
2 votes
3 answers
628 views

What prevents this transistor based discrete logic gate design from having been used?

I am interested in building discrete logic gates as a teaching / learning tool to explore computer fundamentals. The easiest logic gate design I can come up with consists of the following: It is ...
finitud's user avatar
  • 121
0 votes
1 answer
47 views

First PCB design - remix of PCB I found already on the market with some 12V DC jacks - any advice?

I created my first PCB design - its a remix of PCB I found already on the market with some added 12 V DC jacks and XH-2A jack - this will only ever be used with 12 V up to 2 A - wondering if there are ...
Dieskim's user avatar
  • 101
0 votes
0 answers
69 views

Design procedure for switched capacitor dc-dc converter

I am looking for some references to design a switched capacitor dc-dc converter, however I could hardly find any reference online. I am aware that the design method depends on the actual topology of ...
Dev's user avatar
  • 61
1 vote
1 answer
137 views

How do I use the TPS5403 DC-DC buck to get 3.3V output from a 5-15V input?

I am trying to use the TPS5403 (datasheet) buck converter to power an ESP32 at 3.3V from an input of 5-15V, however, I can't find enough resources online to be sure in my design. Below, I have ...
OskarZyg's user avatar
0 votes
0 answers
54 views

Is this a working way to design a sequencer and an oscillator connected to each other?

I would like to build a sequencer that controls an oscillator. I attached the schematics. The basic principles are that R_1 and R_2 are chosen, so that they yield a voltage of 0.7V at point D ...
ssheep's user avatar
  • 27
0 votes
0 answers
54 views

How does this motor work?

I have been on a bit of a quest to find some sort of linear motion device to compress a spring with 15kg of force 80mm at 1600mm/s, with continuous duty cycle, ideally under $40. So I was digging for ...
Yassin's user avatar
  • 43
0 votes
3 answers
123 views

Linear Motor Design

I previously uploaded a question on trying to make a solenoid attract a magnet 80mm away, however this ended up being an impossible ask due to solenoid's having a max effective attraction distance of ...
Yassin's user avatar
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0 votes
1 answer
138 views

Strong Compact Solenoid Design

I have a spring that I need to compress 80mm. To do so requires approximately 15kg of force. To compress the spring, I will have the spring in front of a piston head. The piston head will have a ...
Yassin's user avatar
  • 43
1 vote
1 answer
93 views

How to make sketch-like wiring diagram

I am wondering how to draw such connection diagram in sketch-like style as on belowe picture? I have designed some boards in KiCad and I would like to make wiring around my PCBs in style similar to ...
Madras's user avatar
  • 136
3 votes
2 answers
76 views

Battery terminal better design

We are a Tier 1 automotive locks and key manufacturing company. We are in the process of designing a remote key system and are considering one of two design strategies. Production volume is expected ...
Mandeesh Singh's user avatar
1 vote
0 answers
44 views

Does "field electron emission" used in EEPROM work better than "hot-carrier injection" in NOR Flash?

After deeping research based on my another question, I continued comparing Flash and EEPROM based on wikipedia comparison table. From wikipedia about the Flash memory: Programming the source-drain ...
An5Drama's user avatar
  • 183
1 vote
2 answers
146 views

How to approach controlling multiple sets of solenoid valves?

Please excuse me for asking basic questions as I am a newbie in this field and learning as I go. I have a project that requires simultaneous functioning of two solenoid valves. I require three sets of ...
Jacques Le Roux's user avatar
0 votes
2 answers
68 views

Custom FFC Cable Design

How do I design a custom FFC cable on Eagle? Company wants them made in-house but I am not sure how to go about designing them or where to start
m_white's user avatar
3 votes
2 answers
198 views

1.8 - 2.0 Vout regulator

I would like suggestions to build a very simple circuit to supply a Vout of 1.8-2.0 V with a Vin of 3 V supplied by 2 D cell batteries. Load is 20 Ω. I think 2.4 V Zener with a regular diode could ...
no name's user avatar
  • 33
0 votes
0 answers
31 views

Where in the 0.02066? (Bowtie antennas)

I'm relatively new to EE and antennas, but no stranger to RF analysis. After reading through many different articles on Bowtie antennas, I'm at a loss as to where the value of 0.02066 comes from in ...
AaronJPung's user avatar
1 vote
1 answer
42 views

How to compare these parameters through a cost function?

I am comparing three filter designs based on different criteria. Basically my question is about what is like the best way to compute like a number, or figure of merit to evaluate this criteria. ...
Granger Obliviate's user avatar

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