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

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n-Bit Parallel Register Implementation

I need to implement a bit slice of this register as a module. However I cannot figure out how to design the circuit to produce the desired outputs. ...
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1answer
27 views

In what order should I isolate and attenuate an audio signal?

I have a cheap bluetooth audio module (with no documentation) that outputs a signal greater than line-level. It was probably designed to be connected directly to small speakers, since the ground on ...
0
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1answer
58 views

AB class amp, design considerations

I've been playing around with this circuit. It's a minimum parts AB class amp. I've managed to get it to work but I still don't understand how should I optimally adjust resistor values and ...
2
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1answer
29 views

One-Line Diagram Standardized Symbols Information

Good day, people. I'm trying to get into electrical substation design and I'd like to know which standard sets the rules for substation One-Line Diagram Symbols . Any ideas of where can I get that ...
2
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1answer
65 views

Using Electronic Components To Make A Chain Reaction

I've been tasked with creating a Rube Goldberg machine that employs mechanical, chemical, and electric components as a school project. I've got ideas ready for the two former topics, but I'm stuck on ...
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1answer
44 views

Hi, in following circuit how do i calculate value of inductors L1, L2, L3, L4. (Design equations for inductors)

What will be the design equation to calculate values of inductors L1, L2, L3, L4.
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24 views

ATMega32U2 USB Issues

I purchased a couple ATMega32U2 chips from Varical the other day since they were very well priced and there was free shipping. I also finally discovered the pinout to this QFP32 socket I have. So I ...
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3answers
52 views

Thickness Measurement

I would like to measure the thickness of a stack of paper without touching it. The measuring device needs to show if one sheet is removed. I do not need to know the measurement in inches. Units are ...
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1answer
16 views

arduino based multiple ultrasonic with range variable output for each [closed]

I'm new to Arduino but have been an analog electronics tech for over half a century. I'm trying to prototype an Arduino based personal navigational device for blind user utilizing multiple ultrasonic ...
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2answers
42 views

Use to switches to provide necessary voltage

I am wondering how to work this out and have been busting my head over it over night. In fact, I was working on this till 03:00. In all, my shed is solar powered. I am only powering some LED 1W ...
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0answers
28 views

why resistance of n-channel transistor in series is less than p-channel transistor?

why series n-channel transistor resistance is less than the p-channel transistor? how n-channel transistor are faster than the p-channel transistor? why additive "on" resistance of series transistors ...
0
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1answer
63 views

Power on reset circuit for microcontrollers

In this schematic, there is a reset circuit with two pushbuttons: The button marked "warm reset" sends an active low signal to one microcontroller, while the button marked "cold reset" sends a ...
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2answers
71 views

Possible to imitate a wolf's howling with a simple electronic circuit?

I would love to build a small circuit board that outputs something that sounds similar to a wolf howl to a small speaker. With "simple", I mean I would prefer if I could use simple components such as ...
2
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1answer
67 views

LM2907 schematic critique

I have been working with the LM2907 as I have been designing a few circuits around it. This has lead to me wanting to understand more of its inner workings and build up a breadboard model of the ...
6
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1answer
677 views

Should I avoid BGA?

I am designing a board and have found that a BGA component is cheaper than the larger footprint. I am curious if I should be reluctant to implement a BGA with regard to extra steps during ...
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0answers
34 views

how to simulate wide swing cascode current mirror

I want to design a wide swing cascode current mirror (question-left) and in order to apply Iref, I have designed a PTAT and applied it to M3 and M5. Iref must be 50uA and the diagram of output should ...
0
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1answer
72 views

Connecting Microcontroller to Higher potential

I am curious how to determine what voltage is acceptable to connect to a micro-controller through a resistor. From the data sheet the highest voltage on a GPIO is 3.8V. So If I have 5 Volts going ...
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1answer
71 views

static Hazard and challenging questions

i read some notes that wrote: for following Function F, has static Hazard, if B=C=D=1, and for each change in value of A, the Static Hazard 1 can be. Why this statement is True?
3
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1answer
56 views

Storage lifetime considerations for electronics

I am working on a single board computer that I am aiming to last for up to 30 years. It will be based on this design, with a lm7805 voltage regulator circuit and address + data line LEDs. I am ...
3
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1answer
79 views

SystemC vs HDLs

I am currently involved in a university project to implementing a processor of an existing instruction set. The idea is that by the end of the project I should be able to synthesise this design and ...
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0answers
36 views

FSB decoupling capacitors and what are their functions

I'm reading the intel core2duo datasheet and it says bellow regarding front side bus. The processor integrates signal termination on the die. In addition, some of the high frequency ...
3
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1answer
50 views

For IIR low-pass filters, what design provides the least amount of phase shift in the pass band?

Given all the possible design options for IIR filters one could consider (e.g. Butterworth, Chebychev, inverse Chebychev, elliptic, Bessel, etc.) which design provides the least amount of phase shift ...
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0answers
41 views

Expandable power supply for multiple components with different power requirements

Suppose an Arduino based project involves multiple sensors and actuators, each with its own power requirements, what are the ways to build single power supply for it ? Further is it possible to make ...
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1answer
66 views

Modular mixing table with balanced internal bus: is this a proper way to do it? [closed]

TL; DR: Is the schematic below seem like a proper way of building a mixing console with differential internal bus? I always wanted to have a mixing console but I want to do it the maker way: build ...
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6answers
2k views

How do you document your hardware design decisions?

How do you document your hardware decisions in the design phase? How do you avoid having to ask yourself the following questions while reviewing an hardware design that you made in the past: Why did ...
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2answers
54 views

Homemade PMOS LDO again, is a few millivolts of oscillation normal?

After I walked through datasheets of different op-amps it turned out that I can live without the NMOS as a driver for the pass transistor, using TL084 op amp (or ...
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0answers
50 views

Hardware design methodology

I would like someone to explain the three domains in hardware design and the relation between each of them. And how is it used in Hardware design. I tried searching on the internet, but I find ...
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2answers
70 views

Design of Op amp given transfer function

i want to create a circuit as a homework with Operational Amplifiers ,Resistors and Capacitors that has a transfer function : Actually i have been given the following ciruit and its transfer ...
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2answers
52 views

Using FPGA specific hardware components when writing RTL

I have heard at times that someone writing a digital circuit design may want to use actual primitives present on the FPGA directly in the design. This means including the library which contains those ...
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3answers
152 views

Frequency Detection Circuit Design

I want to create a circuit that can detect audio frequencies and flash RGB LEDs different colors depending on the detected frequency. The frequency range will be from 20 Hz to 12 kHz, after looking at ...
0
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1answer
105 views

how to add a 5V USB output to the base of a mass produced custom table lamp to add phone and tablet charging capabilities

Hello I am a lighting designer that just released my first table/desk lamp design. I would like to add a USB charging port to the base, so people can light their desk and charge their phone or tablet. ...
2
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1answer
67 views

General Engineering - Organizing Information, Ideas, Projects, Reference Material, Physical Parts etc [closed]

As you work on project and learn new things there is information and things learned that you want to refer to in the future. The commonly used things are not a problem, when used enough you usually ...
0
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0answers
70 views

switching of mosfet using IC TL594

Switching of mosfet using IC TL594 I can't find the required circuit diagram switching of the MOSFET using an IC. Is it good to use the PWM method for switching ??
4
votes
5answers
309 views

voltage regulator design flaw in application?

I am a veterinarian and I need some help. I purchased two very expensive lift/weigh table/scales. After about 5 years of service one of them failed. I determined that the main PC board had failed. ...
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2answers
104 views

Op amp circuit design

I am having trouble with understanding how to design circuits involving op amps. I need to design a circuit using as less op amps as possible which has the following characteristics: high input ...
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3answers
359 views

What is the purpose of a resistor on the non-inverting terminal of an Op-Amp Integrator? [duplicate]

I have seen this type of circuit design a few times, but am not sure why it is needed. Considering the schematic below, what is the purpose of resistor R3?
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3answers
85 views

Designing a Single Board linux computer [closed]

I'd like to design a single board Linux computer, maybe something ARM-based but I really don't know that much about the hardware side of computers. Does anyone know where I could get some information ...
0
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1answer
107 views

My attempt at designing a voltage regulator - will this work?

I am recently getting into electronics design and learning about all this fascinating stuff. I wanted to challenge myself to build a voltage regulator that can take the output from a series of solar ...
14
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6answers
2k views

Why implement microcontroller in FPGA?

I am currently "investigating" FPGAs, what they can do, how they do it etc. In more than one place (for example here) I have seen projects that implement a simple microcontroller with FPGA. So my ...
3
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1answer
98 views

Are there conventions for representing hierarchical components on a schematic?

Say I'm designing a device with a lot of repeated elements, like an 8-channel audio mixer. Each channel will have functional units that are identical and repeated, for example, an amplifier. To keep ...
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0answers
30 views

UL ETL IEC certs

I finally got to the stage where I can design some usefull circuits, im starting to get into Power electronics, and im about to start designing my 1st switching mode power supply , and I want to do ...
1
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1answer
54 views

Estimating the schematic of a black box using the measured impedance curve

I need to estimate/predict the circuit design of a black box using the measured impedance at the output of this box. The only hint I have is that the circuit inside the box is a demodulator. Is it ...
1
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1answer
76 views

Provide power if power is not present already (circuit inside)

I am designing a simple controller for an automotive application. As you can in the schematic below, they system is consisted of a sensor, a gauge and a controller. This particular sensor shorts its ...
0
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1answer
69 views

Question about MOSFET CS amplifier simulation

This is the project statement: I have designed the circuit and it worked well. This is the circuit: It contains 3 voltmeters and 1 ammeter as shown. This is a plot for ...
0
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1answer
90 views

Copper weight/thickness current capacity

i have been reading about how Copper weight/thickness is important in several areas of PCB design. The thickness and width of a trace determines the amount of current (amps) the trace can carry. The ...
7
votes
3answers
243 views

How to find out if a microprocessor is powerful enough

Everybody knows its easy to develop a proof of concept for an embedded device on a rasbperry pi or even a PC, although when it comes down to choosing a microprocessor for your product, it is difficult ...
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1answer
113 views

Microcontroller-based SMPS designing

Is it feasible to construct a variable voltage SMPS using one of each of the following: ATtiny84 microcontroller IRF4905 power PMOS 2N7000 signal NMOS 4.7mF cap 220uF cap AD5280BRUZ100 100kOhm ...
2
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3answers
230 views

How to test and rate a home-built low dropout regulator?

I built a low dropout regulator following experiences building a discrete linear regulator. The circuit is simple like this: simulate this circuit – Schematic created using CircuitLab I ...
1
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2answers
70 views

Best elements for downhole and high temperature circuits

I want to design a data-logger with PIC MCUs. This data-logger is going to work in chamber in the oil wells in the depth o 500 meters. and it is going to record temperature and pressure for 20 hours. ...
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37 views

load cell platform

We are making our own platform for our digital weighing scale using a load cell(maximum capacity of 200kg). We have made something like this but we are unsure if this is the most ideal design ...