Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.

learn more… | top users | synonyms (4)

-3
votes
0answers
34 views

What does a TIVA Ware C series give me that an Arduino doesn't?

I find the Tiva Ware Launchpad 129x with its CodeComposer to be somewhat tiring to work with. I have been working on it for hours and I still encounter rudimentary problems left and right, as there is ...
0
votes
1answer
28 views

Serial communication using Arduino and TeraTerm

I wrote a simple serial program using Arduino Mega 2560, it is connected to COMPORT 10. Here is the program I Wrote, ...
0
votes
0answers
28 views

Writing to Flash memory with Arduino Mega

I have just bought a 4Mbit flash memory chip. But I cannot figure out how to use it with the Arduino Uno or Mega. Can someone show me how to hook it up and use it.
1
vote
1answer
22 views

IR Reflective Sensor Accuracy

I'm working on a project that utilizes an array of IR sensors and recievers to map objects directly in front of it. This is similar to the various interactive coffee table setups that light an LED ...
0
votes
2answers
31 views

HDMI 5 port switch detecting LED with Arduino

Hey all I am wanting to make a project for this HDMI 5 port switch I have. I want to be able, with an Arduino, to detect which of the 5 ports are being used (only 1 can be used at any given time). ...
1
vote
1answer
42 views

Strange result ADC(Arduino Micro) Thermistor KTY 10-6

Where's the error in the following circuit/code ? Some time ago i got various sensors . One of those was the kty 10-6 (3 pieces). At the beginning i could not find any datasheet or examples about ...
1
vote
2answers
81 views

Signal generator: PWM or R2R?

I want to build a signal generator using a ATmega 328P on an Arduino. Which way would be better. Using one of the timers (8bit or 16bit) built in to generate a PWM and then low-pass filter it, or ...
0
votes
0answers
5 views

Replacing atmega8 with atmega328 on Arduino Single-Sided Serial Board [migrated]

i want to know that if i use atmega328-pu instead of atmega8 on this design provided by "https://www.arduino.cc/en/Main/ArduinoBoardSerialSingleSided3", will it works fine on this design or i have to ...
0
votes
0answers
39 views

what is the importance of the resistors that connect to push buttons ? can i replace them by wires? [migrated]

Please, iam a junior in arduino and i want to know what is the importance of the resistors that connect to push buttons? can i replace them by wires? thanks in advance.
0
votes
2answers
34 views

How to use 3 pin current sensor

I have 3-pin current sensor honeywell csnf661 the pins are +V, -V, O/P or I+ I wanted to interface this on arduino and I followed the instruction at openenergymonitor.org I am not sure if I ...
0
votes
1answer
31 views

Arduino Yún and battery life

I am working on a small project that requires an Arduino (Yún?) to be powered by battery and connect to wifi. I am thinking of using the Yún since it already has wifi abilities. My question is: What ...
0
votes
0answers
36 views

Can't get values of max232 with loopback [migrated]

I didn't find answers which solves my problem with the max232 yet. I connected it like this to my Arduino uno, so my Arduino provides the +5V VCC and the ground: max232 connection The only thing ...
1
vote
2answers
47 views

Piezo into 0-5v ADC, with offset center voltage?

I want my piezos to have a center voltage at 2.5v for a 0-5v ADC input on Atmega328, so it can sense force in both ways - one way would be >2.5v and the other will be <2.5v. Will this circuit ...
-2
votes
0answers
21 views

driver motor dc connect to arduino?

please help me make a dc motor driver with a large current (10A) with a relay that is connected to the arduino and code. by using two buttons Thank you
-2
votes
0answers
18 views

rfid and arduino

I want to ask, I want to create a project using RFID barrier gate. I want the way it works when the RFID is scanned then the bar will be open 90 degrees, and after the vehicle passes through the ...
-1
votes
1answer
52 views

Question about Vcc

I am working with an Arduino Mega 2560 and have an sensor connected to it. I have read instructions about how to write code to read the supply voltage, Vcc, immediately prior to executing analogRead, ...
0
votes
0answers
26 views

Burning Arduino Leonardo Bootloader to ATmega32U4 with 8MHz internal clock [migrated]

Burning question: So, I'm trying to burn the Arduino Leo bootloader onto a ATmega32U4 that's on 3.3V and the internal 8MHz clock. Do I have to modify and rebuild the bootloader to set the fuses ...
-2
votes
0answers
63 views

Arduino Tx / Rx pins, what type of protocol is it?

When you use the Tx and Rx pin in the arduino and plug that into another Arduino what type of protocol is that ? i myself am looking to build a similar system on a humanoid im putting together and in ...
0
votes
2answers
56 views

Amplify Pizzo Buzzer

I have an Arduino pro mini connected to a Lipo 3.7 battery. I am using a pizzo buzzer connected to a Ultrasonic sensor, the buzzer only makes small clicking sounds, I assume this is due to lack of ...
0
votes
0answers
34 views

Measuring touch-weight resistance in piano keys

Piano technicians, such as myself, use an old, labor intensive way of measuring touchweight resistance in piano keys. I would like to automate this process electronically. This is an explanation of ...
-2
votes
0answers
24 views

Beginner Projects for Arduino Uno and Raspberry Pi [on hold]

I'm an absolute beginner in doing stuff with the Raspberry Pi and Arduino(Uno). Actually, I just got them yesterday. I was wondering if there were any beginner projects for them. I would prefer if the ...
0
votes
0answers
22 views

Optimizing an Arduino code [migrated]

I am working on project and using Arduino Pro Mini (Atmega328p running on 2xAA) to measure the time to charge a capacitor (when the volt level is high). This is the code I used while testing: ...
0
votes
2answers
66 views

Implementing Safety Shut-Off Relay In Project

I am working on a project which I have poured lots of cash into that involves water, pressure and electronics in very close proximity of each other... Lately, I have been considering adding some ...
-1
votes
1answer
40 views

Infrared Door opener

I have a case here, in the main entrance corridor, we have a door which have an automatic door opening mechanism if you push a button. There is also an IR receiver, I was planning to make a ...
-1
votes
0answers
33 views

ESP2866 Style controller but 5GHz [on hold]

So I'm looking into using the ESP2866 for some projects but I noticed it operated in 2.4GHz. Is there a cheap alternative that supports 5GHz?
0
votes
0answers
5 views

How to program a CLK signal and its inverse with Arduino/AVR [migrated]

Is it possible to simultaneously output a clock signal and it's inverse using the timer register(s)? I'm using the following code in arduino to output a 1mHz signal on OC1A: ...
0
votes
1answer
49 views

Feeding arduino with ATX standby power

I'm designing an Arduino shield to allow the Arduino to control, among other things, an ATX power supply -- I'm running GPIO pins to the PS_ON and P_OK pins of the ATX. I would like to be able to run ...
-3
votes
0answers
38 views

Send arbitrary Wi-Fi raw packets with ESP8266 and Teensy 3.1

I have a Teensy 3.1 and a ESP8266, and I want to craft special raw packets (such as ARP packets). I searched the web and I found a discussion on www.esp8266.com ...
1
vote
0answers
49 views

Raspberry Pi GPIO pin layout + Cooking Hacks Shield [migrated]

I am studying the schematic diagram of the Raspberry Pi to Arduino shield from cooking hacks and I noticed that there is an inconsistency in the labeling of the pins. So, this gives me two questions. ...
0
votes
0answers
17 views

Arduino WiFi goes SOAP XML [closed]

In my project I need to communicate with smart camera via its wi-fi network through a series of HTTP POST with SOAP XML envelopes within. So, what shield/module I should buy ti do it? Could it be ...
0
votes
1answer
26 views

Xbee serial communication

I'm building a mesh network with xbees, arduinos and sensors. Right now I have 2 Xbee routers and 1 coordinator. Each xbee module has an arduino attached. To communicate from the router to the ...
0
votes
1answer
59 views

Proper Method of Powering Nokia 5110

I am considering getting some Nokia 5110's for use with my Arduino Nano board but I am in a pickle because I can't tell the correct way to wire it. Some people say to power it with 3.3V and only ...
1
vote
0answers
44 views

How to use L293D to spin HDD motor FAST?

Short version: I have a HDD motor I want to spin. I have the L293D chip and after hours of fiddling with code and timing, can only achieve 1200 RPM. How can I get more out of it? Long version: I have ...
0
votes
0answers
35 views

ULN2803 acting really strange when changing Vsupp from 9V to 5V

So I'm trying to replicate a camera flash for a model camera, I'm using an atTiny, pushbutton, some bright white leds and a pushbutton. My sketch is very similar to the ButtonStateChange Example in ...
5
votes
2answers
262 views

Logging lithium battery discharge: why this curve?

I'm using Arduino to log the discharge curve of a 5V battery pack (usb type for smartphone recharging). Using Arduino I read the voltage every second and I save it to a log file. Arduino is powered ...
0
votes
2answers
130 views
+100

Controlling electric power steering using an Arduino to emulate torque sensor

I am trying to control an electric power steering rack with an Arduino. To do this I need to "trick" the EPS module that there is torque being applied when there really isn't. On the rack there are ...
0
votes
1answer
89 views

Can I connect a MOSFET to an Arduino directly?

I have the following electromagnet and plan on connecting it to the following MOSFET which will be controlled by an Arduino (I'm thinking analogue or PWM). Do I need any other parts (resistors etc.) ...
0
votes
0answers
28 views

Cannot read PORTB from ISR [duplicate]

I am trying to interface an ultrasonic sensor to Atmega328P (arduino uno). I have connected ECHO pin of the sensor to PORTB and used pin change interrupt on this pin. Inside the ISR I try to read ...
0
votes
1answer
52 views

Making a magnetic levitation system with arduino

I am planning on making a magnetic levitation system with an arduino that checks the value of a hall's effect sensor twice per second (but I have tried even 1000 times a second though) and turns the ...
0
votes
3answers
65 views

sd mp3 player board *Christmas Present Project* [closed]

I recently bought a turtle night light that projects starts and plays a little lullaby. the music is triggered by a switch but i would like to have it so on click of the switch it plays music i have ...
1
vote
2answers
58 views

3.3v from 5v Arduino digital pin

I have an ESP8266 that I've got connected to my arduino and communicating quite well with... Now I'm looking at options to run my conifig via battery, so need to find ways to shutdown the ESP8266. ...
2
votes
1answer
57 views

choosing the right Opto isolator?

In the process of developing an RDM Compatible DMX receiver board (using a ATMEGA328) and I have been fortunate enough to come across kimliv's most informative answer concerning such a board; DMX on ...
0
votes
1answer
56 views

speed control loop for line following Robot

I am working to control the speed in my line following Robot (using arduino uno),by using proportional constant Kp in a closed loop, in my code I calculate the RPM from The Right Motor and the Left ...
0
votes
0answers
58 views

Replacing an IR sensor with buttons

So i have this HI-fi sub-woofer control thing that only has remote control support and i have no remote and I've got no codes for universal remotes. tbh just some switches on the side would be all i ...
0
votes
2answers
66 views

Help building a scheme (involves L293D H-bridge)

I'm making a bluetooth-controlled fire truck for my son based on an old wire-controlled truck I bought at a yard sale. It didn't have its wire-remote. I already got Arduino Nano to drive 2 motors ...
4
votes
3answers
337 views

Use network cable internal wires for Arduino project connections

I am new to Arduino and Raspberry Pi, and I have no eletronics knowledge outside of this. I have a good programming background. I just learned how to solder (basic), got my LCD working, my rain ...
0
votes
0answers
40 views

433MHz transmitter and receiver pair doesnt work [migrated]

I have a pair of 433 MHz transmitter and receiver: Transmitter is connected to Arduino pro mino, receiver to Arduino uno r3. Output of receiver on serial looks like that(it doest change much): ...
0
votes
1answer
93 views

Make stun gun with Arduino as oscillator

    Hello. I've noticed that for creating "sparks" with an transformer I need an oscillator. I want to know if I can use arduino for this. I'm afraid of breaking it because of the ...
1
vote
2answers
58 views

Interpreting CAN Bus Data from OBD Port

I'm using Arduino with MCP2515,2551 to read data from CAN bus over OBD port of my car, Honda Jazz 2012. From what I've read on other forums and OBD wiki, I can transmit the PID query to engine over ...
0
votes
1answer
45 views

3v wireless arduino and power consumption

I decided to create another post in order to get feedback for my ideas. I have created a network of wireless sensor nodes which connect to a central arduino with serial connection to a RPi. I ...