Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.
0
votes
2answers
35 views
Relay Connection 120V
I have a 16 channel SainsMart relay board and I'm controlling 120VAC on one side and DC on the other.
I tested with DC by wiring the source to the common pin, and the load on the NO pin.
I intend ...
0
votes
0answers
20 views
Arduino DUE deadlock problem, watchdog not working [migrated]
I am using Arduino DUE in my project. The project is massive (about 7000 lines of code in total, with massive schematic), so I decided not to post the whole code and schematic, except explain the ...
-1
votes
0answers
4 views
Introduce Zero Touch (with IR Module Array) to non-touch screen Interface with Windows
I have a non touch device and would like to introduce DIY touch to it. I was going through a number of possibilities and the concept of infrared touch and positioning has caught my attention.
Also ...
1
vote
1answer
84 views
Is this usage of an Op Amp valid?
My ultimate goal is to measure how many Amps are drained from my battery UPS with an Arduino chip. The circuit should be ready for up to 1kW loads creating currents of about 50A.
Consider the ...
0
votes
1answer
14 views
What resistor should I use for connecting seven segment to Arduino?
I am planning to use Arduino with a 4 digit 7 segment that uses TM1637 driver chip, which has 4 pins, and uses 2 pins for data with i2c protocl.
Here is the code and datasheets:
https://github.com/...
0
votes
1answer
30 views
Connecting hc-05(bluetooth) with clicker2 with STM32(ARM)
For a school project I a got HC-05 bluetooth module and MikroE Clicker2 with STM32 (ARM).
When I connect and use module with Arduino, 9600 BAUD rate and all other settings used with SoftwareSerial ...
0
votes
1answer
30 views
How do you figure out an efficient battery setup?
I have a project where I need an arduino uno and 4 dc motors to run on batteries. My first thought was that I'll just hook up 3 or 4 AAs to the arduino and a 9V to the motor drivers.
I googled to be ...
0
votes
0answers
32 views
Using HC05 Bluetooth SerialPort to stream music/voice via Arduino
I'm considering streaming music/voice over Bluetooth serial link (via HC05) from PC to Arduino. By doing this, there would be no need for a SD card. Here is the questions I have.
Any help is ...
0
votes
1answer
46 views
How to Control High Voltage/Current like A/C air conditioner with Arduino?
I need to On/Off an air conditioner with arduino. I think Relays are not suitable to handling an A/C. So experts please help me.
0
votes
1answer
52 views
Do I need buffer amps and zeners for SPI pins in a tiny IC chip?
I am currently working on a project using the MMA9555L pedometer chip (from Freescale Semiconductor Inc.) and establishing communications through an SPI bus going into an Arduino Uno. Below is a ...
0
votes
0answers
13 views
Waking up async the Arduino while it's sleeping periodically
I´m using LowPower.h and PinChangeInt.h libraries to put my Arduino into the sleep mode every 8 seconds and then it wakes up, ...
1
vote
2answers
81 views
How to decide voltage divider values - Arduino Nano?
I am building a simple voltmeter circuit that needs to measure up to about 35 volts. Looking around the web, I am finding all sorts of suggestions for voltage divider values, like 1 Mohm / 10 Kohm, ...
0
votes
0answers
84 views
EMG amplifier using LM358
I came up with the following simple schematic in order to amplify the EMG signal and feed it to an arduino:
simulate this circuit – Schematic created using CircuitLab
The problem is that I ...
1
vote
1answer
42 views
Arduino: Did I damage analog joystick clicker by using analog instead of digital input?
I am using a thumb joystick for Arduino UNO, trying to work with it.
There are x and y values that I get with analog input <...
-4
votes
0answers
36 views
Arduino Micro schematic adjustments?
I have an arduino micro and I want to create a pcb that is basically the same thing as the arduino micro but I'm going to change some stuff up. I downloaded the eagle files for the schematic but I don'...
0
votes
0answers
16 views
OSX 10.11 Issue Connecting to ESP8266
I am trying to program an ESP8266 using OSX 10.11 (El Capitan).
I have tried to connect to it via FTDI, as well as via PL2303. In both cases, I can see the serial connection in terminal, and if I ...
-3
votes
0answers
22 views
Accuracy of hall effect sensor
Im planning on making my own esc with an arduino and some transistors. Im going to generate the sine waves with the pwm pins and maybe make a halve-bridge. The big problem Im facing is that I want 0....
0
votes
2answers
62 views
Is it good general practice to avoid powering components from the 5v pin on an arduino?
Most examples and tutorials have you power small components by connecting them to the 5v pin on the Arduino. As part of my learning process, I've messed up an arduino or two by not considering the ...
0
votes
0answers
24 views
Detecting a 2.8ms pulse using a arduino UNO [migrated]
I am working on a project for knowing the position the of DC motor which has a hall sensor built into it. I am newbie into programming using the arduino uno R3. After some forum search and self checks,...
0
votes
0answers
29 views
prototyping board arduino-like that has 2 hardware serial support [on hold]
so I have been using an arduino uno for my little project. The issue I am facing now is that I have to have 2 hardware serial ports that are able to non-blocking write. I basically have to write to ...
2
votes
2answers
135 views
Arduino power and networking over cat6
I plan to run about 4-5 arduino pro micro in my backyard to handle controlling of solenoid valves for garden watering based on measurements of soil (so we keep it well watered).
My question regards ...
-1
votes
2answers
128 views
Why I don't get 5v output on 2N2222 using Arduino?
I have this circuit.
My problem is: Why I don't get 5v on relay pins if I have a 5v 3A power supply powering everything? I only get about 4.7v.
simulate this circuit – Schematic created using ...
-2
votes
1answer
37 views
What is tolerance of sensor and how to find it? [on hold]
What does tolerance of a sensor specify? I believe it should be given on the datasheet. However, I could not find the tolerance of TMP36 temperature sensor.
0
votes
1answer
21 views
Read (High/Low) Arduino Output with an Raspberry GPIO Input Port
I want to trigger events on the raspberry (3) with an Arduino. Because of very contrary statements to this, i am kinda Lost. Arduino outputs 5V, that should be read by an Input of the Raspberry. Just ...
0
votes
5answers
138 views
Use of Capacitor in output of op amp
Can somebodu explain why cuttoff frequency of voltage divider should be much lower than other parts? I didnt get how impedance will be less. It according to me be a Low pass network if low cutoff ...
0
votes
0answers
39 views
Problem with Micro SD spi mode in AVR [migrated]
I'm trying to read a Micro SD block. But I don't know why it doesn't work.
I do:
...
0
votes
0answers
28 views
Problem transmitting 60 bytes with a CC1101 and an Arduino
Update
Changing the following two registers seemed to get rid of most of the data in the start, there is still an initial blip that I'm not sure how to get rid of. However there is still something at ...
0
votes
0answers
37 views
Arduino Wiring question - 15+ RGB Led how to wire ground?
I am creating a sensory board for my son that is going to use an arduino for various things, one of which is 15+ rgb LEDs. I am using the sparkfun shift registers:
https://www.sparkfun.com/products/...
0
votes
1answer
77 views
Where to put the Flyback Diode in a Relay Module?
I'm working with a relay module to switch a solenoid with an Arduino, Im having problems because the arduino get some noise in an LCD but I'm not sure where to put the diode, there is 3 pins, In, Vcc ...
0
votes
3answers
133 views
Send text data using FM frequencies [on hold]
I want to design a device which receives basic text wirelessly, and outputs this text on a display. Using Wi-Fi is not a option. I have an idea that it would be possible to do this using FM ...
-5
votes
0answers
32 views
Redirect phone calls-fast call [closed]
Hi I want to add some landline phones to an already build closed phone network.
What I mean:
Right now I have 3 landline phones I call 123 from phone no1 and connects me with phone no2 but I want to ...
-4
votes
0answers
30 views
Does nema 34 with driver DM442 leadshine work with grbl? [closed]
I'm Building my own cnc, using GRBL system with Arduino.
I'm using GRBL Shield Board with Arduino Uno with 2 A4988 Stepper Driver for two nema 17 motors for X axis and y axis
but now i have problem ...
-1
votes
0answers
30 views
PROTEUS simple 3 phase inverter with PWM generated by ARDUINO UNO, Problem, Unexpected Voltage output
So i have made a basic 3-phase voltage source inverter in Proteus using Arduino as the PWM generator. The problem is, the output voltage, don't have 3 steps in their amplitude, they are made of only ...
0
votes
2answers
46 views
Arduino Uno R3 - Beginner Question
Question
As far as I know each I/O pin has to keep around 20mA, what are the consequences of going higher or lower? But if I am using all I/O pins is there a maximum current value I should keep in ...
0
votes
0answers
8 views
Remote temperature sensor system without slave board [migrated]
I want to build a temperature control network over my house reading data from each room and sending it to the main board for further processing. I need about 6 sensor nodes sending the data over the ...
0
votes
3answers
130 views
Is it safe to frequently restart an ATX power supply
I'm powering five Arduinos and four LED strips (600 LEDs total) from an ATX power supply (CoolerMaster B2 Series 700W). Four Arduinos drive the four LED strips, and the fifth Arduino periodically ...
0
votes
0answers
57 views
I want a 32V, 5A current through the LED in 15 us pluse [closed]
I want to give a 15 us pulse to my LED whose drive voltage should be 32V and current should be 5A.
I used Arduino MEGA2650 to generate a signal and MAX16818evkit to drive another LED. However, ...
0
votes
0answers
6 views
Brushed Dc Motor Control with Arduıno Motor Shield [migrated]
I included in wind turbine project and they want from me to control Brushed DC motor with Arduino Motor Shield.Than,supply 12 volt battery.However, with respect to my research I can not correct the ...
-1
votes
0answers
19 views
How to connect many PIR, LDR sensors with Arduino?
I am trying to implement a project that will sense motion of vehicles on the street and turn on the lamps accordingly. An LDR on the top of a lamp will sense if there is still daylight and another LDR ...
-3
votes
0answers
20 views
Arduino + XL6009 Buck Booster + Servo [closed]
I have an Arduino Uno board, an XL6009 DC-DC voltage booster, a powerbank 2a output 5v and a servo motor.
When I run the servo motor from powerbank it is working, but I want 7.1V, so I bought a ...
0
votes
2answers
53 views
Arduino - Calculating Resistor's Power and Resistance
My Question
I know, for example, that using a LED in Arduino without a resistor would cause damages to the Arduino's I/O (damages the LED too?), right? Resistors as far as I know have the two main ...
0
votes
4answers
55 views
Nyquist theory for sampling data from TMP36
Is there any way to make sure that sampling temperature(voltage) using arduiono UNO from TMP36 sensor does not violate Nyquist theory?
0
votes
0answers
26 views
Can ESP8266 connect to Wi-Fi network that requires not only SSID and password but also username and password?
Can ESP8266 connect to Wi-Fi network that requires not only SSID and password but also username and password?
It's not about web captive portal. It's about a popup that appears in Windows when you ...
0
votes
2answers
36 views
decode the data of TWO RF transmitter transmitting simuletanously [closed]
i am using 433MHz RF receiver and transmitter. i am facing the problem in receiving the data while TWO RF transmitter's are transmitting data at a same time.i am using ARDUINO UNO for decode the ...
0
votes
1answer
58 views
Use one power source for two atmega chips
I'm working on a big project recently that requires 2 atmega chips one to handle input midi signals and one to transmit output midi signals. Because of the complexity of the project I cannot use one ...
1
vote
1answer
34 views
Whats the highest voltage dc motor that my mosfet can control?
I am using a IRF520N Logic level mosfet to control a dc motor with my Arduiono Uno. What types of DC Motors (i.e 20-24V) can I use without damaging the mosfet?
Datasheet: http://pdf1.alldatasheet.com/...
-1
votes
1answer
42 views
Correct circuit for photodiode with an Arduino [closed]
For a university project, I have to use this photodiode.
I've tried following two circuits for a photodiode that I found here on the site. How to Use SFH235 IR Photodiode Correctly?
However, the ...
0
votes
0answers
18 views
Re-enable Arduino after short [migrated]
I happened to short-circuit my Arduino by mistake. It was powered by USB on my Windows 7. The OS was so smart to pop-up warning about USB power surge and shut it down immediately. Arduino survived.
I ...
0
votes
0answers
39 views
What is the best iPad / iPhone method to control home automation projects? [closed]
I am struggling to figure out the best "app" for IOS to control a lot of projects I want to create. I can do all the Arduino programming and all the wiring, with no problem. I have done a little ...
0
votes
1answer
125 views
Is my schematics correct? (Atmega328p for solenoids control)
Finally I finished the second version of my circuit which should control different solenoids.
You can view the large version here.
In particular, this circuit should control 2 proportional solenoids ...
