Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.
0
votes
2answers
47 views
Low DC Current (~ 1.2 A) SPDT for Arduino
A little explanation first.
I am working on an Arduino project where I want to measure photovoltaic power generation by measuring voltage and current of an array of 10 small PV modules at 5.5 V. ...
0
votes
1answer
32 views
PI control Implementation for Buck Converter using Arduino
I am implementing current control on my synchronous buck converter using ARDUINO UNO. I designed my control via "Symmetrical Optimum" method and calculated the values for Kp and Ki (not Kd since i am ...
0
votes
0answers
30 views
Arduino PN532 Shield UART [migrated]
I recently purchased an adafruit pn532 shield and I'm trying to get it working with this node library https://github.com/techniq/node-pn532.
So far, I've managed to get it to read the tag if I place ...
1
vote
1answer
43 views
Automotive or solid state relay as main switch for 3D printer?
I have 47A 12V server power supply for my 3D printer project. The idea is to add a relay before printer hardware (RAMPS, Arduino Mega clone, steppers, bed heater etc). The normally open relay is then ...
-7
votes
1answer
65 views
How can I connect an Arduino to computer wirelessly (range of 250 meters)? [on hold]
I want to transmit data from an Arduino to a laptop within a range of 250 meters. The data I want to send are basically GPS tracking and variometer results. The final goal is to build a quadcopter. I ...
2
votes
2answers
116 views
DC - DC Boost Converter Calculations
I have been attempting to simulate a DC-DC Boost converter in 'CircuitLab', rather than going down the route of using an IC I have decided to go down the 'traditional route' and use a MOSFET, simply ...
0
votes
2answers
43 views
Why use decoupling capacitor with Servo S2309S and how does it work?
I read the following statements in Arduino Projects Book, explaining about the use of decoupling capacitor in a circuit connected to a servo.
When a servo motor starts to move, it draws more ...
0
votes
0answers
62 views
Running 3 Phase brushless DC Motor at Full speed
I am trying to run a HDD Motor at Full speed to create a POV.I have figured out the Combo that makes it run Forward but when I decrease the amount of delay between the pulse it skips a step.
I am ...
-1
votes
0answers
41 views
wheelchair motor calculations [on hold]
i am confused with the coefficient of friction used for the motor calculations here...
for force calculations i used this formula
F= ma + uN .... here i saw that a guy used u=o.04 (max possible for ...
0
votes
0answers
3 views
What's Happened with my Arduino? [migrated]
I am in a First Year Design class, and we are supposed to be making an autonomous robot. After hooking up some wind speed and temperature sensors to calibrate, I plugged in to my laptop (we have 2 ...
0
votes
0answers
17 views
connext card reader (tda8024t) to arduino
I salvaged smart card reader from tvbox, it uses tda8024t as interface between card and MC. I managed to trace what goes where and Im trying to connect it to ardunio using sclib based on this schema
...
0
votes
0answers
27 views
Ardunio Mega Failure after first use of Mega Shield power connector [migrated]
I have an XDRduino Mega clone with ATMega2560 and MEGA16U2 USB support chip. I also have a Sensor Shield (same vendor), which provides screw terminals to Vin and Ground.
I connected the board with ...
-1
votes
2answers
62 views
How to make a USB Circuit board with 176 button? [on hold]
I just want to make my own Piano 88 key (176 button), each key should have atleast 2 buttons to calculate velocity, Circuit board should send a message to a computer through USB like this : "1 200ms"
...
0
votes
0answers
41 views
Using 5V arduino with 12v solenoid lock [migrated]
I wish to use an arduino like this with a 12v solenoid lock like this. How can I do this. I am told that using this might work, but I am also thinking I can use a transistor's amlification to do that. ...
0
votes
0answers
20 views
GPS Module ET314AC with Arduino Mega [duplicate]
Can I use GPS Module ET314AC with Arduino Mega? Here is the datasheet of ET14AC ET314AC Datasheet
0
votes
1answer
54 views
Arduino PCB issue
I have made few different Arduino board which are programmable only via ISP because the Serial communication is giving me this error:
Binary sketch size: 3,026 bytes (of a 30,720 byte maximum)
...
2
votes
2answers
58 views
Replace mechanical pot with digital
I have a motor controller board that handles 24v and up to 60a and can be varied via a mechanical pot of 100k ohms. I want to replace it with a digital pot like an MCP41100 and control it with an ...
0
votes
0answers
5 views
Burning arduino generate hex file to blank atmel chip [migrated]
Is it possible to burn the hex file to a blank chip, generated by Arduino to burn using USBASP to that particular chip without using Arduino board ? Will the program work ?
-1
votes
0answers
26 views
How to connect ET314AC Gps with arduino Mega [on hold]
How to connect GPS module ET314AC with Arduino.I want to know the connection of pins to Arduino and Antenna. Here is the link for ET314AC Data Sheet ET314AC Data Sheet
0
votes
0answers
12 views
IR receiver transmitter High frequency [migrated]
I build photo gate, to detect throwing ball.
It works fine when delay time in main loop for max 40 milliseconds.
Problems start when I delay every loop only for 20 milliseconds, now my LED which ...
0
votes
1answer
55 views
arduino current
I want to start learning EE with Arduino so as a project I decided to build an Ohmmeter and measure a (specific) resistance that should be about 100 KΩ ±50KΩ.
In order to probe for that resistance I ...
0
votes
0answers
54 views
Can't determine is RF module working
I just brought a RF 433 MHz Transmitter-receiver Module . I wanna try this beginner (as I have no idea about wireless communication) code from instructables .But Nothing happens.
My Transmitter's ...
0
votes
1answer
35 views
converting data sent into audio signal using microcontroller that suits the application
i want to convert text or some numeric data got into speech to make it audible for the listener how do i make it?
Like example :
Say the temp detected at some far place for some process is some "x" ...
0
votes
2answers
67 views
Thermistor resistance to celsius conversion
I'm new to electronics, and experimenting with a thermistor plugged into an Arduino. It is a 4.7k thermistor (full specs) and I'm using it in conjunction with a 10k resistor (product page).
When ...
2
votes
3answers
76 views
How to avoid Attiny84 being powered on by a pulled up data line?
I've developed a simple sensor board based on the Attiny84a microcontroller which is able to communicate over a serial connection. I'm using an arduino bootloader and the SoftwareSerial library on ...
0
votes
0answers
63 views
Basic PCB Arduino [closed]
I would like to design a PCB using existing software such as Eagle/PCBWeb, to mount several of my Arduino sensors altogether. I don't understand what's the proper way to model the "holes with copper ...
1
vote
2answers
78 views
Struggling with serial communication over RS 485 using modbus protocol
I have around 60-70 inverters that I want to talk to using arduino over RS-485. The connection that I am making with arduino is according to the attached image.
Now I think that my connection part ...
1
vote
1answer
72 views
Creating a vector display with a laser
Recently, I've been playing with arduino and programming games on an oscilloscope! I thought it would be really cool to recreate a classic vector screen (like the vectrex ...
0
votes
0answers
24 views
Pcduino corrupted - how do i reset to initial state [migrated]
I updated the lubuntu 12.04 in PCduino v1.
But it was my mistake, that it is not capable beyond 12.04.
After that it crashed and i restarted the pcduino and it stops here. I have put a output here.
...
3
votes
2answers
70 views
Using zero crossing detector for brightness control of several loads
Zero cross detector(IC H11AA1) generates a pulse exactly at zero crossing of AC wave. I am trying to control the brightness of several bulbs(nearly 48 loads). I have 5 different states for them. At ...
0
votes
0answers
21 views
Serial communication between Computer & Arduino via XBee [migrated]
I configured two XBees using XCTU, connected them to the computer and sent Bytes back and forth. Works.
This is the current, non-working setup:
1 XBee, connected to the Computer using a SparkFun ...
1
vote
3answers
77 views
8x1 header in OrCAD
I'm trying to create a LCD Arduino Shield for the Arduino Uno using OrCAD. I want to add 8 pin through hole to solder headers into them. However, the 8 pin header in OrCAD library under Connector ...
1
vote
1answer
35 views
Controlling Speed and Powering 12V DC Motor with Arduino and Wall Supply
first post here. I am a mechanical engineering student, but know little about electrical engineering or electronics. I am doing a project that requires me to (affordably) control the speed of a 12V DC ...
2
votes
2answers
123 views
Counting number of motor rotations?
I am trying to count the number of times a motor rotates for a fatigue test machine I am building. What type of sensor/electrical component is needed to count the rotations? I plan on having it ...
2
votes
2answers
109 views
Why are the capacitors on the image being used with the DC motor?
Why are the capacitors on the image being used with the DC motor?
For my arduino aplication with L298n is ok to keep or remove them?
0
votes
0answers
61 views
Tracking strength-training exercises using Accelerometer and Gyroscope [closed]
I recenlty came across wearables and watch apps which track repetitive exercises – such as weight training and calisthenics – via an arm-worn inertial sensor (Atlas wearables and Vimo app).
The ...
1
vote
2answers
64 views
Close/open a physical button circuit via Arduino
I have an electronic dog door that is triggered by an ultra sonic collar on the dog:
Electronic Dog Doors are NOT All Created Equal
The end game is to be able to trigger this door using an ...
3
votes
1answer
65 views
Measuring current in independient circuits
I'm doing a project to monitor and control 5 separate air conditioner units in my house.
The AC Units run in 240V power (two 120V phases), each unit has its own breaker in the box.
I'm using five ...
0
votes
0answers
20 views
Sparkfun Bluetooth Modem (RN41) Mode:entering pin
I'm trying to use the sparkfun bluetooth mate gold modem (microchip RN41) link in master mode to another BT modem in slave mode WITH pin authentication. However when I try to connect I receive the ...
0
votes
0answers
41 views
Measuring sunlight with BPW34 and Arduino
I used the circuit found on the web, but with this circuit I get 5 V constantly, the diode doesn't have any effect. Am I missing something? The code is:
...
1
vote
1answer
51 views
How can I calculate the voltage over a microphone?
I want to make a microphone myself with the Arduino (capsule=microphone):
I have bought the following as microphone:
As is in the datasheet the microphone operating voltage is between 1.5 and 10 ...
0
votes
0answers
40 views
DC motors running very slowly using 12V supply and L298n IC?
I am using arduino and L298n motor driving IC to drive 4 12V dc motors (150rpm).
Also I am using 11.1V LiPo battery (3cell, 3300 mAh, 20C).I have connected two PWM pins of L298n to digital HIGH from ...
1
vote
2answers
73 views
Overheating heating element
I'm making a system that is going to heat water in a 25 liter tank to a given temperature and keep the water on this temperature with a precision of +/-0.5 °C. As I have done some research I have ...
1
vote
1answer
78 views
Charging battery through relais and arduino
I'm designing a charger system for my lawn mower robot.
The idea that I had is based on a relay. As soon as the robot reaches the charging station, with "Volt Sense" pin it detects a charging ...
1
vote
0answers
46 views
Accelerometer calibration using Gauss Newton Method
I got an ADXL 337 from Sparkfun and My sensor works as follows
...
1
vote
0answers
79 views
electric wheelchair
I'm making an electric wheelchair . I want to lift a total weight of 100kg on it with a max speed of 4mph. So help me choose appropriate motors(dc geared , stepper, or .....) and batteries (12 or 24 ...
0
votes
2answers
68 views
Powering LED Strip with Arduino using Transistor
I am trying to use the 5v output from an Arduino to control a 12v LED strip. I have an N-Channel MOSFET but I am confused on how to make it work. Here is the MOSFET Datasheet: ...
0
votes
0answers
12 views
How to read the serial data from a ATMEGA8 on a PC using Arduino? [migrated]
I want to check if a device is working or not. It is a custom made PCB with a Atmega8. It was given to me along with the AVR code. How do I read the data that it sends on my laptop using a arduino, ...
3
votes
1answer
64 views
Basic CAN-BUS circuit - what does this section do?
I'm currently learning how to make a circuit for CAN-BUS communication and came across the schematics of the Sparkfun CAN-BUS shield for Arduino (can be found here). I'm a little puzzled by this ...
0
votes
1answer
44 views
Lm35 arduino and battery
I am doing a project where I need to measure temperature using lm35. I am using arduino's analog A0 to measure, I light up extra LED on an other pin while measuring. Suddenly the alarm triggers. I ...
