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What paths can the induction spike from a relay controlling a Fan and Aircon unit take? How to problem solve it? What would you do?

Problem: I have an induction spike feeding back into my AirCon and Fan control project when the fan or Aircon is switched off. The program keeps running on the microcontroller but the spike ...
Jonathan Birch's user avatar
0 votes
0 answers
102 views

Clock logic for 8-bit computer

I have been in the process of remaking Ben Eater's 8-bit-computer, and have a few questions. I got to the part where the clock, which consists of 3x 555 timer, is connected with logic gates. However, ...
lukasm06's user avatar
0 votes
1 answer
231 views

Qucs voltage divider tutorial: simulation error

I am going trough the voltage divider tutorial on pp. 4 and following of the Qucs manual. On p. 11, I simulate the circuit, and I obtain following message: What does this mean? I cannot insert a <...
Karlo's user avatar
  • 183
-4 votes
2 answers
87 views

What is the best video/textual source for learning circuit designing? I want to create a high amplitude, function generator? [closed]

I am a self taught software programmer, I have an electrical engineering project where I have to design a function generator of high voltage/amplitude using 555 timer. The function generator that I ...
Yogie's user avatar
  • 129
2 votes
0 answers
25 views

How do I learn about RFID families [closed]

I recently got a parallax RFID reader. The documentation says that it only works with the EM4100 family of RFID tags. So I tried looking it up and can’t seem to find any sort of resource explaining ...
Ziad Khayat's user avatar
0 votes
3 answers
318 views

Can someone explain the mysterious non-behavior of the DAC0808 and DAC0832, is there a difference between them on the output side?

So I have been very happy successful with my R-2R network ladder DAC powered by 74LS245 or similar bus transceivers, with 1% resistors, for nearly perfect output voltage going from 0 to +5 rail, with ...
Gunther Schadow's user avatar
1 vote
0 answers
102 views

Creating a low cost raspberry lora node [closed]

I'm trying to integrate LORA communication in a project that uses a raspberry pi. I've bought this module to serve as a gateway for testing: https://www.amazon.es/gp/product/B076T28KWG/ref=...
Meruje's user avatar
  • 103
1 vote
1 answer
104 views

How to dive into IoT world with just high-level programming experience [closed]

I came from a high-level programming world and recently got a bit bored. Now I want to dive into IoT subject and start a hardware side project. I was thinking if there is a Hello World IoT tutorial, ...
joe.kovalski's user avatar
0 votes
2 answers
724 views

Short ISE FPGA Workflow Tutorial

I'd be much obliged if somebody could point me to a short ISE workflow tutorial that shows how to implement a simple circuit using VHDL. As indicated, the tutorial should be short as I'm not ...
Marc van Dongen's user avatar
0 votes
1 answer
926 views

Tutorials on embedded programing using Zynq 7020 with ARM processor

Just as the question states. I have been having trouble being able to just test out the programming side of the ARM processor on the TE0720 board. I have been searching online for how to setup the ...
GdB's user avatar
  • 61
2 votes
1 answer
317 views

Construct a post-equalizing circuit to compensate imperfect of the DAC

The post equalizing circuit is shown on above. How do I determine the value of the capacitance? I couldn't find any equation to determine it. It have been advised to use LT6202 to construct it, data ...
user37970's user avatar
  • 139
0 votes
1 answer
138 views

I know how to program, how do I learn how to wire things up? [closed]

I'm computer science student, I know: some basic VHDL program in C or assembler basic electrical laws (ohm law, kirchhoff, ..) basic electronic parts (diode, tranistor, ..) What I don't know are ...
Filip's user avatar
  • 121
33 votes
2 answers
12k views

How can I reverse engineer a simple through-hole board?

How can I reverse engineer a simple through-hole board? Trying to do it by eye gets confusing because it's easy to lose track of component orientation and location while flipping the board over. Maybe ...
Vitim.us's user avatar
  • 1,081
2 votes
1 answer
1k views

Persistent memory on msp430 without FRAM

For persistence in FRAM-enabled msp430 there are convenient "noinit" and "persistent" variables... For flash-based MSP430G you need to use flash memory. There is a demo for it. (...
Vi0's user avatar
  • 527
8 votes
5 answers
2k views

How to think while working with VHDL or Verilog

All of my experience belong to general purpose programming languages e.g; c/c++ etc where each instructions are executed one after the other but it seems in VHDL/Verilog, all the instructions are ...
itsaboutcode's user avatar
7 votes
2 answers
3k views

Online guide to electronics [closed]

I had the luck to have someone who could explain everything to me, but most starting hobbyists don't have someone like that. Is there a guide available which covers all the basics, like formulas, ...
328 votes
6 answers
421k views

Choosing power supply, how to get the voltage and current ratings?

Power supplies are available in a wide range of voltage and current ratings. If I have a device that has specific voltage and current ratings, how do those relate to the power ratings I need to ...
Olin Lathrop's user avatar
3 votes
1 answer
799 views

Antenna modeling software and tutorials

I'm starting to learn about antenna theory, feedlines, and different types of matching. I can build antennas etc from plans but I would like to be able to design my own and understand their ...
MarkSchoonover's user avatar
1 vote
1 answer
1k views

What project is good for a total beginner [duplicate]

Possible Duplicate: For a seasoned programmer Arduino or something else? I am an advanced systems programmer, y have 8 years experience programming software for various platforms. But recently ...
Ponchotg's user avatar
31 votes
5 answers
62k views

How does division occur in our computers?

How does division occur inside digital computers? What is the algorithm for it? I have searched hard in google but haven't got satisfactory results. Please provide a very clear algorithm/flowchart ...
program-o-steve's user avatar
10 votes
2 answers
10k views

5v Power Supply Tutorial

I couldn't really think of a good name for this topic, but basically Im looking for a good Tutorial/Schematic for kind of a "basic" Power Supply (To run Experiments off a breadboard). Typically they ...
user avatar
3 votes
2 answers
5k views

PICkit3 vs PICkit2

I would like to know the difference between the pickit3 and the pickit2?. Currently I'm studying in an electronics course and am using the pic18F. What I'm looking for is an introductory guide to ...
silent's user avatar
  • 203
1 vote
1 answer
415 views

Xilinx System Generator: A summary of frequent errors during the Simulink - modelling stage

I wonder if there is a kind of guide or summary about tipical errors at modelling design stage that users tend to do. Thank you so much for your help. By the way. Some people ask me why I don´t use ...
Peterstone's user avatar
8 votes
1 answer
28k views

How do I install a KiCad schematic or footprint library?

After I download a KiCad schematic library or footprint library -- such as the ones from http://kicadlib.org/ -- how do I use it in my schematic and layout? Should I install that KiCad library file ...
davidcary's user avatar
  • 17.6k
2 votes
3 answers
3k views

recommendation to learn verilog

To learn verilog, can anyone recommend any web-page or book? I have never seen such type of a language before, so what you recommend should be for beginner.
user avatar
18 votes
6 answers
7k views

Choosing Configuration Jumpers - Solder bridges, 0-ohm resistors, DIP switches, pin jumpers

I'm working on a development board, and need to let users set some configurations. It will be used by students and engineers who are trying to build circuits on a breadboard; I'm not dealing with ...
Kevin Vermeer's user avatar
3 votes
2 answers
832 views

Where can I find good tutorials on sensor circuit design? [closed]

I'm looking for tutorials/explained examples on circuit design in general, but specifically on using various sensors.
slashmais's user avatar
  • 415
20 votes
8 answers
47k views

How many individual lights can an arduino control

I want to use a regular Arduino board to control LEDs - what is the most lights I can control individually from the board? Is there a tutorial on how to hook it up?
mad_z's user avatar
  • 5,050
21 votes
11 answers
7k views

Op-amp tutorial for electronic noobs?

Can anyone point me to a tutorial for electronic noobs that explains how to use op-amps and what I can do with them, besides amplification?
Nikolaus Gradwohl's user avatar
5 votes
3 answers
5k views

Using the iPhone to control a remote controlled car via Arduino

So i started this project a while back where i made a remote controlled car that i could control with the directional buttons on my keyboard via an Arduino -> now the next step i want to do is to get ...
mad_z's user avatar
  • 5,050
3 votes
3 answers
439 views

Using a Wii Nunchuck for data collection

Anyone got a good tutorial on using and Arduino to capture the Wii Nunchuck accelerometer data?
mad_z's user avatar
  • 5,050