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Questions tagged [system-design]

This tag should be used for questions regarding the selection of components, deciding functionality, and other issues that may come up during the early stages of a project.

1
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0answers
30 views

How to read .txt file from the internet wirelessly [closed]

I am a complete beginner to Arduino, so I'm asking this moreso to see if a project will be feasible. My ultimate goal is to have this arduino (whenever powered) check this website "https://services....
0
votes
2answers
56 views

GPS Short distance calculations, accuracy limitations for 1-30 meter distance [closed]

I am a total beginner in the field of GPS, and this is actually my first post. But, I have been looking into some of your questions, and especially the ones for short distance calculations, and time ...
0
votes
1answer
129 views

Build an improved GSM antenna for arduino mkr gsm 1400

I want to use an Arduino MKR GSM 1400 in my area wich has a bad connectivity on mobile internet. On my phone it's very weak and if i drive to the next village it works sometimes on the arduino with ...
0
votes
1answer
21 views

How to connect both MicroSD module and MPU9235 power in an arduino

I'm really new at electronics and wiring, so please be kind. Coding is my stuff, but I'm trying to learn something here. I'm working with a project to store the movements of a skateboard through a ...
0
votes
2answers
60 views

Relay with mechanical fallback

In my circuit I have a relay that will turn on some light bulbs this is my circuit: The switch over the 5V is in fact my Arduino. A HIGH will turn on the relay and a LOW will turn it off. This is ...
1
vote
1answer
107 views

How to reset an arduino while being able to know which button has been pressed?

Context I keep the board in sleep mode and want to wake it with different buttons. I need to know which button has been pushed on boot. In the following schematic, SW-R is actually used to reset the ...
0
votes
1answer
89 views

Master Slave Arduino-Side Multiprocessing

I have started an Arduino robotics project with an HC-05 Bluetooth sensor to send data to my PC for processing. In my design the Arduino is to serve as the slave which gathers data from sensors and ...
0
votes
0answers
390 views

How to control 6 DC motors with arduino?

I am building a step climber robot for a project.It need to climb 6 inch high steps(length of a step is also 6 inches). I want to know how to control 6 DC motors with arduino,do i have to buy a ...
2
votes
0answers
114 views

Boat project - object detection [closed]

My project is to control a dual motor model boat via bluetooth hand-held device. I am using an Adafruit feather 32u4 bluefruit LE and Adafruit DC Motor + Stepper FeatherWing Add-on. I am using the ...
4
votes
1answer
527 views

Using AA batteries to power Arduino and GPS unit

I'm more of a software guy, so I need your help to figure out the power issue with my Arduino. What I would like to do is using a GSM/GPS unit (Ai-Thinker A7) with Arduino Nano as a car tracking ...
6
votes
1answer
132 views

Replacement crystal on Uno for cold temperatures

I want to run an arduino out in the cold (-40), and use the serial communication - I believe that the crystal is the weakest link (the one for the serial chip) - however I don't see any drop-in (...
5
votes
1answer
11k views

Streaming audio from PC to Arduino over WiFi

Say I wanted to, purely hypothetically, set up a pirate radio station by connecting an Arduino to a WiFi network away from home, streaming music to the Arduino, decoding it, and broadcasting it with ...
2
votes
1answer
619 views

“tamper” circuit of a reed switch: can I connect the two wires to an INPUT and an OUTPUT pin?

While working for the automation side of my new house, I'm currently in the process of installing several reed switches on top of external doors and windows. Even if this could be used as a "...
1
vote
1answer
67 views

Designing UI for effects project

I have a project where I am using an Arduino to control a smoke machine and a strobe light using DMX (with a shield). I also use a light sensor, so that when a person pass through it, the Arduino ...
1
vote
1answer
4k views

How Master and Slave concept works with Bluetooth?

From what I understand the master has primary control over the slaves and communicates with them. A master must always be present as well, and can be connected to (up to) 7 slaves. Question If I ...
1
vote
4answers
496 views

Create a device to detect object state

Here is what I want to do or get it done (since I am not a embedded guy)... create a prototype with Arduino to detect open window/door of my room using camera(image processing/object state detection)?...
1
vote
0answers
119 views

How to select a 0.1" header in Fritzing

Does Fritzing support the standard 0.1" break-away header? When I search for "header" in its parts database, I see several examples, and some even seem to reference 0.1 headers, but I can't actually ...
1
vote
1answer
228 views

Arduino and 127/220 Volts: Relay and Isolation

I am new to Arduino, also, I am not fluent in english. I wish to create a controller for several circuits. All of those circuits are "in parallel" with additional circuits. My question is: Do a ...
0
votes
2answers
808 views

Powering arduino and 12V Fan from same supply

I have found a relatively small 12V switching power supply that I want to build into my device, using it to power both the Arduino Pro Mini and a couple of 12V cpu fans. Am I correct in assuming that ...
0
votes
1answer
61 views

Just sanity-checking a concept… poor man's self-monitored alarm system

If I wanted to throw together a simple burglar-alarm system that had wireless sensors talking to an Arduino (which would then send me an SMS message via cellular shield as a silent alarm telling me ...
0
votes
1answer
470 views

Fog Machine - On Command

I work with a marching band, and we want to use fog machines for a particular part of the show. I know how to code/program in Arduino, however I am not great in the electrical and technical end. I own ...
0
votes
1answer
57 views

Is it possible to make an arbitrary lake bottom generator?

I'm trying to generate an arbitrary lake bottom sonar returns using my Arduino. I would like to seed a function with a "depth." This would be the starting depth. I would then like to randomize a set ...
0
votes
1answer
83 views

safety for power electronics

I'm quite new to Arduino. I have build a number of projects successfully, like potentiometers, serial communication, DAC, sensors, motors etc. I use a laptop to power my Arduino project and Atmel ...
2
votes
3answers
2k views

Human circuit trigger

The main idea is to create trigger which can be switched on by touching 2 plates on opposite walls. And these should be performed by few peoples holding each other hands. Obviously human body has big ...
1
vote
1answer
210 views

Very easy Arduino code challenge for you brainiacs to solve

I've searched the forum for similar problems and still can't see my obvious issue. I'm working on a simple Halloween prop and I'm using an Arduino for the first time. I've tested each individual '...
-1
votes
2answers
584 views

Which sensor is best for obstacle detecting with retroreflector?

Distance is about 3m. IR or visible light - does not matter. It is possible that object/obstacle can be shiny, so for correct detection necessary large amount of reflected light. Maybe for this task ...
1
vote
2answers
239 views

What to with reset pin when laying out Arduino PCB?

I'm designing a PCB with a standard arduino ATMEGA328 DIP IC. Do I need to make a connection to the reset pin?
0
votes
2answers
78 views

What are the basic steps to make a printed circuit board?

I created a shield for Arduino on a soldering board. The next step shall be to implement the circuit on a PCB. I'm new to this, so I'd like to know what the basic steps in designing a PCB are. More ...
4
votes
5answers
22k views

How to remember variable values after rebooting an Arduino Uno R3 board?

Is there any way to store the values of necessary variables somewhere (may be in a file that gets updated by the program at various events), which can be read back when program starts after rebooting ...
0
votes
4answers
104 views

Arduino: Breadboards and PCBs [duplicate]

I just watched this excellent video tutorial that shows a simple Arduino program that toggles an LED via a pushbutton. Very cool! In the video, the author is using a breadboard for prototyping his ...
1
vote
0answers
26 views

Low powered proximity aware devices

I'd like to build a set of lower powered devices that are aware of each other. I'd like to make something I can attach to a name badge at events (or even build into a name badge) so that when people ...
3
votes
3answers
3k views

Best Header for Arduino Nano

I would like to be able to create permanent projects with my arduino Nano but be able to remove the nano in order to use it in other projects. The arduino Nano has 30 pins so I would be looking for ...
2
votes
1answer
623 views

AVCC and AREF when using a reference voltage lower than 5V?

I'm designing a circuit that will use a 2.5v reference for the AREF. Should AVCC be powered from 5V or 2.5V?
6
votes
3answers
4k views

ATMega328P-PU and 328P-AU

im planing to make my very own arduino design based on the Arduino PRO mini. I picked this board instead of the UNO mostly because it's way more simpler compared with the UNO since the USB-to-Serial ...
1
vote
1answer
3k views

Arduino Based Solid State Drive

I've searched high and low for something to get me on the right track, it's making me think it might not be possible. Basically, I want to create a cheap SSD using Arduino (or another microcontroller ...
11
votes
7answers
12k views

Loading local libraries

I'm new to Arduino/C development (coming from a JavaScript/Ruby environment), but I was wondering if it was possible to include a library from a custom folder within a sketch? So this is my situation;...
2
votes
5answers
19k views

How can I run multiple programs on an Arduino?

I'm trying to get students to experiment with Arduino. However, due to a lack of boards, two teams of students will collaborate on each board. They will push their own code (independent from each ...
2
votes
2answers
411 views

Programming an Array of ATTiny

I am designing a board for my electronics project and i am using a number of ATTiny85 for it. The ATTiny's will be SMD so i will not be able to remove them for programming. Moreover all of the pins ...
-1
votes
1answer
255 views

What is the best way to establish wireless communication between the Lilypad and a Mac?

I want to build a wearable device for a dancer using the Lilypad and I need to first send the programme from my Mac to the Lilypad board and then transfer the data read by sensors back to my Mac. I ...
1
vote
1answer
4k views

Washing machine controlled by Arduino for homebrewing

So, this question might sound a bit silly at first glance (no, I know, it sounds flat out insane), but not all that silly at second. I have heard once about a guy who transformed some (presumably old-...
2
votes
1answer
3k views

Can I use the setup() function inside the loop() function

In the normal case the setup() function will be run once automatically and and then the loop() function will run many times. I want to initialize several modules in the setup() function and then in ...
6
votes
1answer
5k views

From transfer function to arduino

This question might seem stupid, but I have been curious about it for a long time. So I am a new engineering student, and we learned a lot about "designing a controller". For example, design ...
2
votes
2answers
8k views

Use potentiometer to control motor's speed

Following the arduino starter kit, one of the projects uses a push button to on/off a motor. In the end they suggest to try to use a potentiometer to control the speed of the motor. I already did it, ...
1
vote
3answers
271 views

What is the simplest way to “ask” the arduino which input pins are HIGH?

I am trying to build a 36-line cable tester, using the Digistump DigiX (99 i/o pins). Digital pins 0-35 are outputs, connected via the cable in question, to (in a perfect world) digital input pins 36-...
1
vote
1answer
4k views

Using Arduino to control a 12v car light system?

I am new, but I am wondering what options I may have to control a 12v line that connects to a light with Arduino i/o. Given the voltage limitations of an arduino, I am thinking using some kind of 5v ...
2
votes
2answers
1k views

Exoskeleton Motor Control Code

Background: I have been working on an exoskeleton project with a group of friends, and I need help. I made another post on the robotics.stackexchange site for the drive system: https://robotics....
1
vote
1answer
620 views

Efficient periodic wake up for sensor reads [duplicate]

I've been tasked to do an initial design for an Arduino setup that needs to run very infrequently. Basically, I'd like the system to wake up daily to take some sensor readings and report them back to ...
10
votes
4answers
246 views

How do I know if a board fits my requirements?

I'm new to Arduino and I saw on their website that there are many different kinds of boards. What are the differences, or to be more specific, how would I know which board meets my requirements? I ...
5
votes
5answers
10k views

Is it possible to transmit using an NRF24L01+ without an Arduino?

I have two NRF24L01+ modules which are transceivers, but for my project I would like to send a very simple signal from one of these modules to the be read by the other. That would've been very simple ...
3
votes
1answer
514 views

Arduino stopwatch, which board to use?

I am planning on making a simple stopwatch with: A display One or two additional buttons to start the stopwatch and stop the stopwatch and maybe reset it. The problem is that it has to be as small ...