Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.
0
votes
0answers
39 views
N-MOSFET switching an H-bridge: problems with PWM
In this circuit an Arduino digital pin drives the Gate of a N-MOSFET. When the pin is HIGH, current can flow from the H-Bridge GND to board GND. When it's LOW, current can't flow. What I need is to ...
0
votes
0answers
16 views
Elapsed timer circuit
I have a banner sm502a led scanner that i would like to use to measure the time it takes for the beam to leave a reflective surface till it acquires a second surface. Would like the time displayed on ...
0
votes
0answers
34 views
arduino serial comunication 1Mbps [on hold]
In my project I need to send data(digital data(0 or 1) from computer(matlab) to a circuit, the speed of sending data should be at least 1Mbps. I think,At first, I should send data from computer to a ...
0
votes
0answers
30 views
IR remote unstable button numbers [migrated]
Question
Is there a reason for unstable button numbers of an IR remote?
Desciption
I wrote a remote class where I identify the pressed number of the remote to set states. But however I get never ...
-4
votes
2answers
50 views
how to get current date in arduino without interfacing with pc?
I want to place my kit independently without interfacing without PC,but it needs to know the current date.please do help with your answers.
-5
votes
1answer
25 views
Relay Arduino Connectivity
I am using a relay to connect one of the bulb (240V) and another end to Arduino. I have wired up the bulb to a socket.
Socket Wiring:Red is connected to Line, Black to Neutral.
For the below Relay ...
2
votes
2answers
422 views
How to increase load voltage?
In my circuit diagram I measured +/- 0.7V across the motor. This barely moves the motor as it needs about 5-6V. The resistors in the circuit diagram are 1K.
I've tested the circuit with a low ...
1
vote
1answer
22 views
Opto isolator + triac vs. solid state relay for high AMP arduino project
I building an arduino device to turn on/off a high current (~10A/120V) oven. I was planning on using a solid state relay like this.
I keep seeing advice that talks about using an opto-isolator AND ...
0
votes
0answers
28 views
Arduino based clock with 4 pieces 4" 7 Segment LED Displays
I was going through multiple tutorials on how to create an Arduino clock with 7 segment displays. I planned to build one and purchased 4 large (4 inches) 7 segment 1 digit displays. The displays run ...
0
votes
0answers
25 views
How to make a hardware device to communicate with Andriod phone [on hold]
I would like to make a small device to communicate with Andriod phone or Iphone.
Here is basic requirements.
1. The device has one small push button.
2 . When button is pushed, the device can send a ...
0
votes
0answers
30 views
How to make a hardware device to communicate to my smart phone? [on hold]
I am a software engineer and some electric engineering backgroud.
I would like to make a hardware device to communicate to my smart phone.
For example send a signal or can just talk, or track where ...
0
votes
0answers
26 views
Arduino pushbutton max cable length
i have a question regarding cable length for a pushbutton in a home automation project.
I would like to have some light switches (regular switches from home shops) connected to my arduino - so 5v - ...
0
votes
0answers
22 views
Load cell to arduino board [duplicate]
Good evening everyone,
i would like to ask help with my project. I want to measure the thrust of a propeller connected to a motor using canister type load cell with 10 Vdc excitation voltage and ...
0
votes
0answers
52 views
ESP8266 sends garbage data always on reset
I am assigned to do a project on IOT using the ESP8266 wi-fi module. For refashing the firmware I also bought a USB-TTL converter and installed the necessary drivers on my PC
I connected the RX and ...
0
votes
4answers
65 views
What type of relay should I be using?
So I'm currently looking to control a lightbulb for some inefficient lighting to produce heat for a mini-greenhouse I am building. I'm looking at plugging in a wall wart 12V DC adapter and wire that ...
1
vote
1answer
42 views
Why is GPS module acting strange?
I am working on a Arduino based quadcopter. The Arduino being used is a Blend Micro. Not shown in the following diagram are 4 infrared sensors, 1 ultrasonic sensor and a 9 axis accelerometer.
The ...
0
votes
0answers
28 views
Arduino micro lost connection after first programming [migrated]
I have just programmed a new micro, loaded the basic blink code in it. After that neither my laptop, nor my desktop sees it anyway with the following usb error:
...
1
vote
0answers
40 views
Using map for DC motor instead of servo [migrated]
I am trying to use map command which is used to power servo 180 degrees as the potentiometer moves...
Forward
digitalWrite(I1, HIGH);
digitalWrite(I2, LOW);
...
0
votes
2answers
69 views
Solar powered Arduino project
I have some ideas for Arduino Nano projects I'm throwing around that I would like to power only with a solar panel and I'm wondering if I am going about it the right way. I have: A 7.2V 100mA solar ...
1
vote
4answers
76 views
Arduino powering an external circuit with higher voltage
First of all, I'm sorry for the newbie question. I'm a software engineer and only a hobbyist in electronics.
I'm trying to power up an external circuit using an Arduino digital pin.
The external ...
0
votes
1answer
65 views
How to wire multiple ir photodiodes on one arduino pin?
I'd like to use 50 ir photodiodes.
But, I'm not sure about it because I want it to be read only on one analog pin of an arduino.
My idea is to wire parallel like in this picture.
But, I'm just ...
0
votes
0answers
14 views
Arduino clone ch340g (at328p), MIDI over USB [migrated]
Hi I just bought my first arduino compatible device, and am greatly enjoying it. I finally could not resist the urge after going to an arduino meetup, where someone ...
-2
votes
0answers
27 views
Generating a very specific PWM signal (cannot create enough current from arduino nano being used)? [closed]
I have a circuit which is a prototype to control a solenoid in place of the existing controller (so I get manual control over an automated process).
The circuit uses an arduino nano and a mosfet to ...
-3
votes
2answers
77 views
Can I groud 12v Negative and 5v Negativ at the same time? [duplicate]
I have an external 12v power supply with arduino mega, I want to control a 12v led strip from ardunio mega, so I'm confused little bit can I connect arduino ground to 12v ground? Is this connection ...
0
votes
1answer
53 views
Microphone on Arduino for Sound Detection
I'm working on a design to have a microphone on Arduino board for sound detection (clapping sound etc). I see there are lot of circuits floating on internet but almost everyone has an output to ADC ...
0
votes
1answer
50 views
Powering several 12 V @ 1A Vacuum Pumps
I'd like to power several 12 V @ 1A vacuum pumps (and control them via Arduino).
For a few pumps, I assume a 12 V at 3.5 A adaptor would suffice?
Also, I'm currently using a TIP31C transistor ...
0
votes
1answer
52 views
ADC for low signal (microvolts)
I am a newbie to electronics
I have a sensor that can provide a range of [400 microvolts - 5 Volts]
I want to transform this signal into Digital so that i can read it on computer, I'm seeking a ...
0
votes
0answers
29 views
Measuring the frequency of a 120v variable frequency drive with arduino/pic
Riffing off of this post-- Reading the frequency of an AC signal using an arduino
I'd like to use an arduino (not committed to a model, and would also like to have the ability to consider ...
0
votes
1answer
83 views
Substituting Arduino for ESP8266 in a (Yet Another!) Garage Door Controller
I have a garage door opener with two leads that will activate the motor if the leads are shorted. I hooked my multimeter into the leads and measured ~24VDC and triggered the motor ~50mA.
Using an ...
-1
votes
1answer
117 views
How can I connect dozens of sensors of the same address to one i2c bus?
I want to connect dozens of i2c sensors of the same type to one arduino. Reprogramming the address is unfortunately not possible for all the sensors. I will illustrate what I mean with the following ...
-2
votes
0answers
46 views
How can I detect how much ammonia is in water with an arduino? [closed]
I'm doing a hack-a-thon, and was looking for a good price on a sensor that can detect ammonia with arduino, and was wondering how I can get a very basic one that can detect levels. They seem to all be ...
-4
votes
1answer
60 views
4 pin switch circuit causes Arduino to reboot when pressed
I'm trying to copy an example that shows hooking up 4 pin switches to the Arduino (http://www.cs.uregina.ca/Links/class-info/207/Lab3/).
The problem is when the button is pressed the Arduino reboots. ...
0
votes
0answers
9 views
Does Proteus simulate external interrupts properly using Arduino? I can't get them to work [migrated]
I am trying to simulate an interrupt with an Arduino Uno in Proteus. This is the simple test code that I'm using:
...
0
votes
0answers
8 views
MPU9255 IMU not fetching magnometer data [migrated]
I'm using a 10 DOF IMU with an MPU9255 and a BMP180 to collect orientation data. When I run a sketch for arduino that I downloaded to test the IMU's capabilities, it collects the data from the ...
0
votes
0answers
17 views
Debugging arduino shield for varying voltage [migrated]
I'm using this motor shield for arduino from adafruit. It says it can drive 4 DC motors with it. However, two terminals M3 & M4 (as marked in the image) seem to be supplying lesser voltage.
To ...
0
votes
0answers
59 views
How to “transfer” a capacitive touch?
First post on here so forgive me if I've done something wrong.
I'm designing a product with a control panel and I wanted to use a capacitive touch for selecting options with an ATMega chip (those ...
0
votes
0answers
10 views
How to Determine Fuse Settings [migrated]
I bought an arduino compatible board here: http://unsigned.io/projects/micromodem/
and am trying to flash new supported firmware onto it. The only instructions given to flash the board is to use the ...
-2
votes
0answers
26 views
What protocol does the TSL1401R-LF line scan camera use?
I'm trying to figure out what kind of protocol this line scan camera uses. My goal is to eventually connect it to a micro-controller that I will be programming with the Arduino language.
Here is the ...
0
votes
0answers
15 views
Arduino SoftwareSerial not receiving data from Neo-6M GPS module [migrated]
I am trying to hook up my Neo-6M GPS module to my Arduino Uno but am having some trouble getting GPS data out of it.
The code being used was taken from the TinyGPS library. I have set the ...
0
votes
1answer
69 views
Running LED dot matrix using shift registers
So as the title suggests, I'm using 3 shift registers (74595) to run a dual colour LED dot matrix display by daisy-chaining them (I believe that's the term). I haven't got to the coding bit yet, but ...
0
votes
0answers
31 views
Why is a voltage divider needed for Arduino to read voltage? [duplicate]
I was making a circuit similar to the one shown below. I understand that a resistor is necessary for the analog pin to read the voltage. I know that the higher the current, the higher the voltage. How ...
4
votes
3answers
172 views
P-channel MOSFET as high-side switch gets hot
So I'm trying to control my front lights of my car using an Arduino Nano. In total there are 14 lights (including foglights and blinkers etc.). I'm using two 75HC595 shift registers to control these ...
0
votes
0answers
42 views
arduino control positive and negative voltage
I need an Arduino to control a low current (<10 mA) voltage output that can sweep from about -4 V to + 4V. I'd like to avoid using PWM because of AC noise, I can use MCP4725 Breakout Board - 12-Bit ...
0
votes
1answer
105 views
When wiring IR Phototransistor, why is a pulldown resistor needed?
My phototransistor looks like the one here, wired like this:
I don't know the exact model or anything like that. It came in an Arduino kit and was labeled "flame sensor". I used an arduino to ...
3
votes
1answer
49 views
Unwrapping measurements from Adxl345 accelerometer
I am trying to read acceleration values from a ADXL345 via I2C. I've successfully configured the accelerometer with a resolution of 16G.
Test 1: 180° rotation along the y axis in 16G resolution. The ...
0
votes
0answers
9 views
Are Gizduino Atmega1281 and Ethernet Shield w5100 compatible? [migrated]
I'm creating a dam monitoring system using gizduino x 2.0 (Atmega1281) and GSM Module. Now i need to create a database so I bought HanRun Ethernet Shield w5100. But it doesn't seem to work. The LED ...
0
votes
0answers
47 views
Problems with some potentiometers w/ Arduino and metal enclosure
I'm building an effects pedal of sorts, everything works, except some of the potentiometers are broken. They're all 10K, and I've replaced the broken ones with new ones but then another breaks. It's ...
1
vote
1answer
56 views
2 Pin Flame Sensor
I recently found a 2 Pin flame sensor. It looks just like an LED except it's black. It is not a module and I couldn't find any wiring tutorials for these, just for modules. Does anyone know how to ...
1
vote
2answers
50 views
Eliminating motor noise with hall effect sensor?
I'm trying to build an indexing system for a model railway turntable. I want to use a hall effect sensor as a tachometer for a gear, and control the motor with an Arduino and an H bridge. I have a ...
1
vote
1answer
63 views
Active vs Passive Buzzer
I recently borrowed an Arduino Inland Basic Starter Kit. It includes an active and passive buzzer. What is the difference? I can hear sound difference when I use the tone command. Anything else? How ...
