Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.
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0answers
15 views
Building a custom gamecube controller
I'm looking to build a custom gamecube controller built for ergonomics, and am wondering what the best way to go about it would be. So far the only resources I've found have been regarding interfacing ...
0
votes
1answer
46 views
DC motors not spinning at same RPM?
I'm attempting to make a quadcopter using an Arduino board (Blend Micro). I've wired everything up as such: When I run the following code just to test if everything is working, the motors do not spin ...
0
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0answers
30 views
PWM + Strobe Light using Arduino on 100W LED?
I want to create something like the Sunblaster by DIY Perks, but I want to include a PWM regulation and a strobe function using an Arduino.
I want to use this boost converter to drive a 100W LED. I ...
0
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0answers
18 views
High voltage reading isssue
Here i am attaching old and new schematic for reference.While designing the old board i have made mistake keeping HV- (j14) as common ground reference .
J14 and j12 are connected with high voltage ...
1
vote
0answers
19 views
Soft latching with button sensing and controlled power-off
I'm new to electrical engineering and not yet familiar with all the terminology and methodology, please bear with me.
What the circuit should do
I want a pushbutton to power on the Arduino. Using ...
0
votes
1answer
62 views
Arduino Bell Detector (Unsafe circuit)
I currently have a circuit that the arduino pro mini checks is the button pressed, the relay will be closed to trigger the bell alarm. And a UDP Packet will be also sent to a server to notify me.
...
0
votes
1answer
32 views
Arduino Analog in over voltage
I'm looking to recover from a rookie mistake I made while working on a 12Vdc power supply. My multimeter was reading a 11.8Vdc output off a voltage regulator, and I thought 'Hey I have a sketch that ...
0
votes
2answers
48 views
Arduino signal conditioning
I'm doing a project with an Arduino.
I read a voltage from a tachometer connected to a generator.
The nominal max output is 21V at 1000 rpm. The generator is managed so that the maximum tachometer ...
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0answers
11 views
radio frequency communication of potentiometer values between arduinos [migrated]
Using a 434 MHz transmitter and receiver combination, how would one communicate potentiometer values from a transmitting Arduino to a receiving one? Assuming the virtual wire library would be used I ...
0
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0answers
46 views
Max current through an Arduino Mega? [migrated]
How much current can I put through the pins of an Arduino Mega at the same time?
The situation: I am building a 7x7x7 LED cube, and my plan was to multiplex in 7 layers of 49 pins, lighting each ...
-1
votes
1answer
31 views
interface two wire pH sensor with arduino
I have purchased this pH/EC sensor from https://www.cooking-hacks.com/ph-sensor however it does not have a BNC connector and just two wires, black and read. How could i interface this to an Arduino?
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-4
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0answers
31 views
PWM with 12V DC fan on arduino
I am using an Arduino with PWM to control two 12V DC fans....however the fan works at 12V and Arduino at 5V, what kind of circuit do i need to allow this to function to work?
I would imagine that ...
-3
votes
0answers
19 views
code arduino for xbee routeur (s2) [on hold]
in my project, I need to establish communication between xbee 3 A, B and C .. “A” is mobile on a geographical area as this area is divided into several zones and each sub area is implemented by a xbee ...
0
votes
4answers
184 views
Powering Arduino from a voltage divider
I'm making a voltmeter for the college senior project, and the problem is that voltage divider should equally split 17V into two 9V(nominal value of the batteries. As of now, an actual voltage is 8.5V ...
0
votes
2answers
106 views
problem with connecting the Arduino with 12V electric door strike
I followed this sketch to wire my arduino with a door strike.
but when I upload the code on it, the arduino did not control the power goes to the door strike. the door strike opens whenever I plug in ...
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0answers
23 views
How to derive performance equations from datasheets
I've been researching how to derive an equation for an IR distance sensor's response curve, located here.
I surmised that there is a way to use Excel to plot a trend line to get a fairly exact ...
0
votes
1answer
22 views
What is the difference in the input from inbuilt microphone and an external microphone amplifier?
I wrote a MATLAB script interfacing my laptop's inbuilt microphone to calculate the dbA levels of noise in my classroom. (un-calibrated, as of now)
I want to now use this dbA calculation script on ...
0
votes
2answers
62 views
op amp with single supply - non inverting circuit gain not being produced
I'm trying to boost a 12V signal to around 100-120V using an opamp from a single 12V 5A supply voltage (gain of about 10). I can't seem to get it to work though. Right now I'm just trying to make a ...
-2
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0answers
27 views
XBEE COMMUINCATION PROBLEM [on hold]
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down vote
I want to send two digits data one at a time and I want to update it for this Im using
on tx---- python 2.7 is running with ser.write() code and Xbee S1(Tx) is connected to the port of my ...
1
vote
1answer
64 views
What type of fuse should I use for this basic electronics design?
I'm creating a simple Arduino project that utilizes a solenoid and a rotary encoder. I'm powering the entire device with a 12V 5A switching power supply. I want to add a fuse to the design but can't ...
0
votes
2answers
73 views
Sensing Voltage with a Digital Pin
I am relatively new with Arduino and did a little bit of research prior to this post. But I am trying to sense when I have voltage coming from an AC/DC converter (12Vdc) so I can switch from my ...
1
vote
2answers
41 views
How to attach a jumper wire to rotary encoder pins?
I need to attach a rotary encoder to an arduino. The rotary encoder has 3 metal prongs that I need to attach wires to.
This picture explains exactly what I need:
What type of wire attachment is ...
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votes
2answers
72 views
Amplifier volume potentiometer causes voltage offset
Using answer about microphone I have built a simple amplifier.
simulate this circuit – Schematic created using CircuitLab
I changed some of the parts due to my needs and resources.
R1: ...
-4
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0answers
28 views
Where do I get software stuff for making my own quadra drone homemade? [closed]
I am well interested in making of drone at home. I have seen some videos regarding making of quadracopter drone.
From that videos I came to conclusion , I can get DC brushless motor and other hard ...
0
votes
2answers
45 views
Driving mosfet in battery balancing circuit by an mcu
I'm trying to make a simple passive battery balancing circuit using logic level n-mosfet driven by MCU. However, I've got some issue on how to drive the mosfets by the digital output of the mcu, and ...
-1
votes
2answers
84 views
How do I identify a burnt out component? [closed]
I was given a project completed by another group, they had left school and I was taking over the project from them, with the information that it is not working properly because "something burnt out or ...
0
votes
2answers
118 views
Capacitive touch insulation problem?
I have an "U" shaped metal profile that is 2 meters long each side is 1.5 cm.
It is sprayed with acrilic color. and i want to use it as indirect light profile/enclosure for a 12v Led strip.
While ...
1
vote
3answers
88 views
Arduino code - Why do we need to read the rising edge?
I'm having a difficult time figuring out why we need to read the rising edge instead of using both edges.
We are doing a school lab using interrupts in Arduino code, and I understand that we need ...
0
votes
0answers
11 views
How do I change pin assignments for the LUFA AVRISPMkII? [migrated]
I just managed to get Dean Camera's LUFA AVRISP clone working on my Arduino Pro Micro, when to my dismay I found that to use PDI for my XMega, I need to have PD5 exposed for the clock source! The Pro ...
0
votes
0answers
41 views
Wireless RF Communication between Arduino Uno and Beaglebone Black [closed]
I'm a software guy, so this is a little out of my depth. I would love to learn though.
I'm attempting to establish a Radio Communication between a beaglebone black and an Arduino to control a quad ...
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0answers
23 views
Advice on an Arduino 10x10 matrix input
I'm fairly new to electronics and just getting started with a small arduino kit. The question I have is regarding reading inputs from a 10 x 10 grid - I've seen similar questions around making a ...
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0answers
43 views
Controlling US power with Arduino
For a school symposium, I am creating a self regulating greenhouse (not really a greenhouse just a grow tent that is 3' by 3'by 3').
For the greenhouse I need to turn a pump, a light fixture, and a ...
0
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0answers
22 views
Clone vs Counterfeit (Arduino) [migrated]
On this page on Arduino's website, it states
"HUNDREDS OF COMPANIES AROUND THE WORLD ARE USING IT [Arduino Software] TO PROGRAM THEIR
DEVICES, INCLUDING COMPATIBLES, CLONES, AND EVEN ...
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0answers
23 views
ATMEL SAMD11 SPI (Slave) With Arduino (Master) [migrated]
I am trying to get my Atmel SAMD11 XPLAINED PRO and arduino to talk to each other using SPI. I have set up the arduino as the master, with the SAMD11 as the slave. On the ATMEL, I have the following ...
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votes
2answers
76 views
Arduino how can run the relay module?
Relay modules have 3 pins + and - and input signal, input signal must be negative to runing the relay, so if output pins of arduino are +, how can run the relay?
output voltage of arduino pins can ...
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0answers
24 views
How can I easily see which COM port is used by Arduino? [migrated]
I'm rather disappointed because I just bought arduino and I am unable to upload any projects. The error I get is:
...
-5
votes
2answers
76 views
Wireless transmission without a microcontroller [closed]
electronics newbie here.
I have this project, which needs to transmit the state of two switches as either ON or OFF wirelessly. I know it's doable if I use microcontrollers (Arduino) on both sides, ...
0
votes
1answer
41 views
Connecting a positive voltage to an Arduino OUTPUT pin
Basically I want to turn on a computer power supply using my Arduino. I know that to turn it on you have to sink pin 14 on the ATX connector (PS_ON) to gnd. My idea is to connect that pin to a digital ...
1
vote
1answer
44 views
100k linear potentiometer with arduino
Is it OK if I use 100K linear potentiometers to input values to Arduino?
The documentation specifies 10K should be used and I suppose that would translate to 0.5mA power consumption which would be ...
0
votes
0answers
4 views
Function of rxAlign parameter in the PCD_ReadRegister function in MFRC522 Library [migrated]
I'm trying to port MFRC522 arduino libary(from github) to the ARM MCU's.
my problem is in PCD_ReadRegister function:
...
-2
votes
0answers
23 views
Problem with ATtiny85 and RF modules [migrated]
I am doing a project on a ATtiny85 which involves using 433MHz RF modules. Whenever I want to compile any sketch using the Manchester library I always get these errors : "Manchester library doesnt ...
1
vote
0answers
23 views
Can't compile my library because “String does not name a type” [migrated]
I am writing a small library to move some code out of the arduino sketch and make it reusable. Problem is that it does not compile since "String does not name a type".
This is my code (reduced):
...
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0answers
24 views
Programming Arduino in Pascal? [migrated]
There is any (stable) Pascal or Pascal-like programming language for Arduino?
It could be also a Basic-like language.
0
votes
1answer
47 views
Arduino controlled cat feeder [closed]
I have a cat that tends to eat too much, so I want to control his access to food by putting some sort of barrier on top of it.
I'm pretty sure I saw a YouTube video a while back by one of the Arduino ...
0
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0answers
8 views
Smallest digital 3-axis gyroscope pcb for arduino? [migrated]
What is the smallest size digital 3-axis gyroscope pcb compatible with an arduino that I can buy or maybe make if its simple enough. I need one really really tiny probably around 0.8x0.1x0.5 (doesn't ...
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0answers
26 views
Problems coding a 12 pin 7 segment display and grove temperature sensor with arduino uno [migrated]
Hi I am trying to code my 12 pin 7 segment display to display the temperature from my grove temperature sensor. I am new to this and I have been struggling if anyone code help that would be muchly ...
0
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0answers
11 views
I need help purchasing components for my Arduino project [migrated]
I am a newbie on this hardware stuff. I need help on purchasing the components
Brief description of my project
I need a device that would remotely detect weight or pressure when somebody push on it ...
0
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0answers
10 views
DS1803 Arduino I2C Wiring [migrated]
I have hooked up the arduino mega to my DS1803 and have put 4.7K resisters as pull up resisters on the SCL and SDA line. When I use a scanner program (http://playground.arduino.cc/Main/I2cScanner) the ...
0
votes
1answer
41 views
Input Rerouting using IC or Transistor Application
I'm quite new to Electronics and I have this assignment I have to do - I need to "reroute" the input according to his type.
I have these two inputs, which can be both analog (1 channel, same value on ...
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0answers
24 views
tower pro mg 996r dg high torque 180 servo controling with arduino [migrated]
we are trying to control a robotic arm using the tower pro mg 996r dg high torque 180 servo. at first we tried to power the servo from arduino's default 5v. but it didn't work, then we power it from ...
