Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.
-2
votes
1answer
46 views
Is there supposed to be a voltage differential between V- and Earth Ground on my Power Supply?
I'm debugging something in my machine that's causing it to blow my communication chips (AtMEGA16U2 for USB connection) when I noticed a voltage differential of 0.3VDC-0.9VDC between V- and GND on the ...
0
votes
0answers
41 views
how to open a lock using RFID?
I want to use RFID to open a lock with an Arduino and I was searching in the internet about the components that will help me do that. My question is : do I need a servo motor or a relay to open the ...
0
votes
0answers
24 views
Arduino driver not work, cannot verify digital signature see code 52 [migrated]
For the first time once I wanted to connect my Arduino 2560 board to the PC through USB cable then the situation is following:
Connection of USB cable between Arduino and PC
Driver does not ...
0
votes
0answers
18 views
Trying to print text on LCD display from Arduino trinket [migrated]
I'm trying to simply program an Arduino trinket to display some text on an LCD display.
I'm basically trying to follow this, except connect it to a Trinket rather than an Arduino Uno. The background ...
1
vote
1answer
85 views
Relay Feedback Problem
I am a computer science student working on a project for my Diploma and I am building a DIY PDU,
I thought building something would be a lot funner then programming a website like 90% of the class
...
0
votes
0answers
9 views
HOw TO USE ULTRASONIC TRANSDUCER SENSOR WITH ARDUINO [migrated]
I already searched the site for a duplicate of this question but had a negative result
my question is very simple
I have a transducer ultrasonic sensor,it is a single piece and not couple,and i want ...
0
votes
1answer
111 views
Arduino and GSM Module running on Li-primary batteries for years
For one of our projects we need to run an Arduino board + GSM module (SIM800C for example) for many years on batteries without recharging.
The Arduino should be in power down mode for 99,99% of the ...
0
votes
0answers
32 views
Moving a stepper motor in sine and chirp wave forms
I am trying to put together a set-up with a 4 - phase bipolar stepper motor controlled by an Arduino Uno and driven with a Leadshine ND556 stepper motor driver with a 12 V power supply. Once the ...
0
votes
1answer
22 views
Which pins does the Efcom 1.2 GPRS shield require to be connected in order to work?
I have this GPRS shield for arduino and I'd like to use it later on with some other standalone microcontroller. I have not been able to get it working though without connecting it to arduino and I ...
0
votes
1answer
29 views
Steady state error and overshoot [on hold]
[ the plot of temperature vs time for on/off controller is shown. What could be the steady state error and overshoot . TMP36 and Arduino UNO are used. The temperature increases in step of 0.32 deg ...
1
vote
2answers
55 views
Sound pressure to db analog
I'm trying to convert an amplified microphone output (it is from 0-5v, biased at 2.5v) to a linear response that correlates with db SPL.
From my research, the output of the microphone directly ...
0
votes
0answers
27 views
Where can I get the cheapest Black and white camera without an IR optical filter? [on hold]
I need to make a black and white camera working at a particular wavelength which lies in NIR region.
(a) Where can I find the cheapest such camera?
(b) Is there an arduino or raspberry pi IR camera ...
0
votes
0answers
6 views
Burning bootloader with Arduino as ISP when clock frequencies differ [migrated]
I've made a board with Atmega328, and I put there 6Mhz quartz (the reason to have 6MHz was to reduce power consumption). I need to burn Arduino bootloader to it, and I want to use Arduino Uno (16MHz) ...
0
votes
0answers
17 views
Arduino with wifi shield and 5AA batteries current draw [migrated]
Arduino uno with official Wifi Shield take 5 Volts.
Arduino lights up as it should when powered but the WiFi shield is dead the l9 doesn't light up but works fine when arduino is connected to usb ...
1
vote
0answers
21 views
3 square wave pulse by 120° phase shift and 3 inverted of each by Arduino [migrated]
I want to make a three phase inverter (DC to AC) bridge type using Arduino. For that I want to generate three square wave each is 120° phase shifted and other three waves of main three waveforms ...
1
vote
1answer
22 views
nrf24 bluetooth image transfer
I'm trying to build "arducam-bluetooth-module-wireless-image-system" using an NRF24L01.
I wish to have a long range transfer of a single image from a remote location to my Android phone whenever it ...
0
votes
0answers
33 views
Aruino/laser driver setup
I am working on a project that involves powering an arduino zero and a laser driver. The driver we're using is the OELDC-800DIP. So let's say I use a 9V Duracell battery, the arduino's range is 7-12V, ...
-1
votes
0answers
31 views
Daisy changing 5+ I2c sensors with only two available addresses [duplicate]
Im looking to daisy chain 5+ I2c devices with only two available addresses. One default and another that is active once a pin is set to high. Im looking to minimise the amount of cables between each ...
-2
votes
0answers
39 views
My Arduino is heating up [migrated]
I am working on a simple Arduino project where I am controlling 5 TowerPro servos. I read that each takes up 2.2 V each so that means the Arduino can only handle about 2 , if using 5V. So far Ive ...
-3
votes
0answers
31 views
Pinout diagram of Lora SX1272 RF board module
I already bought Lora SX1272 and Arduino . I would like to connect Arduino with Lora SX1272 RF board module.
However, I couldn't find the pinout diagram of Lora SX1272 RF board anywhere.
Could ...
0
votes
3answers
103 views
What do I need in order to make my arduino to transmit / recieve signals exactly at 433.68 MHZ?
Before I start, please note I am not even near to be an expert in electronics - I just try to do my best with what I have - I apologize in advance if my language is not technical enough.
I have a ...
-4
votes
0answers
61 views
what micro controller should i learn ? [closed]
I am an electrical power & control system engineering student,I know some C and matlab i also worked with arduino before in small project now I have the opportunity to learn one of these ...
0
votes
0answers
20 views
Arduino Yun restarts or stalls during operation [migrated]
I have an Arduino Yun that I need to connect to a machine to detect whether the machine is working or is stopped.
The signal used as a flag for such behaviour is basically the presence or absence of ...
2
votes
1answer
121 views
How can I stop the flicker of LEDs?
Recently I started messing around with controlling RGB leds with the Arduino for a project I'm building, so I built the following schematic:
simulate this circuit – Schematic created ...
0
votes
0answers
35 views
Shielded wiring for distant photodiode?
[Edited to add new circuit diagram and more details]
I'd like to record ambient light levels about once a minute, using a photodiode operated in photovoltaic mode connected to a transimpedance ...
-1
votes
0answers
28 views
What is the best configuration for ultra low power CPU + WIFI radio module? [closed]
The project I'm working on requires the following:
a low power microcontroller that will trigger a message sending event depending on the state of some inputs
a Wifi radio module connected to the ...
2
votes
2answers
62 views
Protecting microcontroller from inputs rising faster than Vcc
I have a microcontroller (ATMEGA328) that I'm using to do analog data acquisition. The problem is that I want my ADC values to be referenced to a regulated external source that is ~3V, but that source ...
0
votes
0answers
31 views
Arduino Uno's RX and TX lights not blinking. Unable to upload sketches! [migrated]
When arduino starts up, RX TX lights doesn't blink. Only the PIN 13 and Green light turns on. Pin 13 light blinks thrice before getting stable. RX TX lights are not blinking at all. I am not able to ...
1
vote
2answers
77 views
12V sound transducer not loud enough
I implemented the circuit below using these components:
LOUDITY LD-BZEN-1212 - its description is "Sound transducer: electromagnetic; without built-in generator" and I am guessing it works like an ...
-1
votes
0answers
44 views
Electric interference from cnc spindle [migrated]
I've got a CNC machine and I recently started using a Chinese spindle for it. At first it was running smoothly with no issues, but after the first brush pair wore off (I've replaced them later on) it ...
-6
votes
0answers
44 views
The measurement of Electromagnetic Radiation using Arduino [closed]
How to detect electromagnetic radiation using arduino? And can we measure the frequency of that radiation.? i dont know what type of sensor circuit i can use as input of arduino board
0
votes
1answer
42 views
Writing to multiple DS2431 EEPROM using Single Arduino [closed]
I am new to Arduino and EEPROM.
I got success in writing to a single DS2431 EEPROM. using following example in the link:
http://www.instructables.com/id/Message-in-a-Chip/?ALLSTEPS
Now my challenge ...
0
votes
1answer
57 views
Motor oscillates when driven by L293D [closed]
I've got problem with steering DC motor with L293D and Arduino. I'm using DC motor from old inkjet printer and a quadrature optical encoder from the same printer to track the position. When I'm moving ...
3
votes
1answer
35 views
CE and FCC for MCU boards/Raspberry Pi HATs/Arduino shields etc
There doesn't seem to be a great deal of information on the internet about this (and the information that there is is usually contradicted somewhere else), so I'm going to ask this here, in the hope ...
-1
votes
1answer
60 views
Analog sensor behaves different when power with USB and Battery
I am using this analog proximity sensor with esp8266 (07)The sensor requires 5V. Whenever I power it with USB the readings are just fine (steady), moving my hand towards it and away from it reads the ...
-4
votes
0answers
50 views
I want to control my keyboard via Arduino UNO with Serial Communication in MATLAB. [closed]
I want to control my keyboard via Arduino UNO with Serial Communication in MATLAB. If I press a button connected to Arduino UNO, a specific key should be pressed and I have to communicate to Arduino ...
0
votes
0answers
33 views
arduino teensy no true HI-Z available? [migrated]
I am using this https://github.com/watterott/SilentStepStick stepper driver to drive a stepper motor.
I am having trouble setting pins to HI-Z/floating to configure the stepper driver.
To set the ...
-2
votes
0answers
48 views
bluetooth module HC-05 [closed]
i am making a voice controlled wheelchair which is controlled using an app called amr voice in android phones.This app sends voice commands in the form of string to the bluetooth and hence the ...
0
votes
0answers
33 views
periodic spikes in analog sensor
I am using Arduino duemilanove and a Sharp gp2yoa21 sensor for proximity sensing.
Now i will be using it to calculate the distance as well so i need pretty consistent and smooth data. But i observe ...
0
votes
2answers
39 views
Buttons for a timing game
I want to create a game with arcade style buttons using arduino. I know there are simple loops you can have to check for a button closing a circuit, but if buttons are checked sequentially in an ...
0
votes
2answers
110 views
How to combine LED and voltage divider
I want to detect the presence of a 8.4V voltage source from an Arduino, so I'm using a voltage divider to step it down to a voltage safe for the Arduino to read with an digital pin.
However, for when ...
0
votes
1answer
53 views
Using Stepper Motor like Hobbyist Servo [closed]
I want to use a stepper motor in place of a hobbyist servo that I am currently using to actuate a throttle. The motor is to turn from 0 to 90 and modulate engine speed between these two positions ...
0
votes
1answer
21 views
Connecting Xbee to Arduino Micro
I have found the following schematics:
How to modify this now to work from the Arduino Micros 5V output voltage (I will run it on 5V)?
For diode can I just use 1N4001 or similar diodes?
As this ...
3
votes
0answers
50 views
ATSAM3X8E: Custom Arduino Due Design
I'm currentlry doing a redesign of the Arduino Due board to include some additional features I need. Browsing through the Datasheet of the ATMSAM3X8E atmel chip, I noticed that the 12Mhz Oszillator ...
-1
votes
2answers
89 views
Continuous micro steps changes harm stepper motor or driver ?
I'm gonna use stepper motor for the first time in our project and it's need speed and precision both to rotate a particular angle. So I'm thinking of changing micro steps continuously like initially ...
0
votes
0answers
44 views
Visible Light Communication in Arduino
I have two questions. I am working on Visible Light Communication using Arduino where the transmitter and receiver are two red colored standard LEDs.
What properties of LED allow it to act as a ...
0
votes
2answers
54 views
Simple stand-alone power supply for an arduino device?
The world of diy electronics is pretty new to me, but I have a sparkfun kit, a temperature sensor, and a new greenhouse that I want to learn the behavior of. Basically, I want to record the ...
0
votes
0answers
5 views
How much energy does RSA consume if implemented on Arduino or Raspberry Pi? [migrated]
is there any way to know how much energy does RSA consume if implemented on Arduino or Raspberry Pi ?. Thank you.
0
votes
1answer
57 views
Interface of HC05 Bluetooth module and RF 433Mhz Module
I am trying to make an Android controlled toy car. Now the range of the bluetooth module is around 10 meters. However, to increase the range, I decided to interface the RF module with the Bluetooth ...
1
vote
3answers
53 views
Chain 16-channel analog multiplexer/demultiplexer
I'm trying to figure out how to chain six 74HC4067 or similar 16bit multiplexers.
My goal is to read multiple analog inputs one after another with Arduino.
I have only 1 analog pin input and 7 ...
