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0
votes
1answer
36 views

What is methology of sending signals via Bi-Direcional Mosfet?

I am trying to make a simulation by using Multisum 14 for i bi-directional channel for Logic level circuit from SparkFun which use Philips AN97055 IC as a Bi-directional level shifter... My circuit ...
3
votes
3answers
21k views

Powering Arduino Nano 12volts

I know that the Arduino Nano can handle 12 volts, and it says it is recommended to power it between 7 and 12 volts. So I am wondering do I just hack together a 12 volt adapter to a Mini-B or is it ...
0
votes
1answer
52 views

What's wrong with my simulation for Bi-directional logic level converter?

I am trying to make a simulation by using Multisum 14 for i bi-directional channel for Logic level circuit from SparkFun which use Philips AN97055 IC as a Bi-directional level shifter... The ...
0
votes
1answer
29 views

Calculating actual humidity using sy-hs 220 humidity sensor

I am getting following output from sy-hs 220 humidity sensor. 466 466 467 466 466 i.e. approximate 466. How would I convert it to actual humidity? As from ...
-1
votes
0answers
21 views

Implementing a charger for 4S li ion cells of 3.2ah each using MAX1640 [on hold]

I am new to the field of electronics and i am intending to develop a charger for 4 li ion cells in series. Each cell is 3.7V and 3.2ah and I need to do this using MAX1640/ MAX1641. I would be grateful ...
1
vote
1answer
68 views

How to measure power factor cos phi with an Arduino?

according to How does one measure the power factor? I can measure the power factor (cos phi) by comparing the zero point crossing of Voltage and Current. This is clear. The problem I have is what if ...
0
votes
0answers
50 views

Start a circuit or device when you insert key in car ignition [migrated]

I want to start a circuit in my car when I insert my key in car ignition and let it turn off when the key gets removed. I have Honda Civic 2007. Can someone just help me out as to from where do I take ...
0
votes
1answer
78 views

What is that mean “This Sensor use 5v as a working Voltage only”?

I am trying to understand the mean of 3.3v or 5v IC but I don't know how to use the right keyword in search engine to fine the explain article so I'll explain... We know Arduino UNO R3 as example ...
-5
votes
0answers
38 views

controlling multiple RGB LED's [on hold]

I'm currently in 1st year for electronics and I want to do a project. Basically I'm going to control about 150 LED's and make them each have different colors. Then I will put white glass over the ...
9
votes
2answers
439 views

MCP3424, how to read channels in parallel?

About this question I do not have an electronics engineering background, and this is one of my first challenges with communicating via I2C, and with writing to a register, so please do not assume too ...
0
votes
0answers
9 views

Problem receiving CAN messages using arduino, MCP2515 CAN module and multiprotocol radio shield [migrated]

I am using an arduino UNO and a Cooking Hacks CAN BUS module through a Cooking Hacks Multiprotocol radio shield. I plan to read the CAN messages through the car's OBD-II port. I have connected the ...
1
vote
1answer
36 views

Piezo vibration sensor board negativ values

I have this piezo vibration sensor module from Grove: http://www.seeedstudio.com/wiki/Grove_-_Piezo_Vibration_Sensor Using this sensor and an arduino device I want to measure two things: amplitude ...
0
votes
2answers
81 views

Need some help to design power supply for custom Arduino PCB [on hold]

I am building a custom Atmel Mega 2560 PCB that will run off the 9V 600mAh rechargeable li-ion batteries in a bus. I need to supply - 5V for MCU and other components in PCB, the overall current ...
0
votes
1answer
45 views

Arduino piezo vibration measurement circuit

I'm looking for a very simple measurement circuit to measure vibrations with a piezo elment and an arduino device. I want to read positive and negative values. I have this sensor: ...
15
votes
5answers
28k views

Arduino Uno R3: Directly supply regulated 5V to 5V pin?

I'd like to use an Arduino Uno R3 battery powered a datalogger. I want do supply it directly with a Step-Up regulated 5V rechargable battery powersource at power ...
1
vote
2answers
1k views

Burn Micronucleus bootloader to use ATtiny85 via usb (avrdude)

I am working on an ATtiny85 usb development board, and I need to flash the Micronucleus bootloader on it. I have heard that this bootloader allows the ATtiny85 to be programmed via usb from the ...
2
votes
1answer
60 views

Freewheel diode / capacitor with this board?

With DC motors, it is common to put a freewheel diode and/or a capacitor in order to protect the equipment as the motor can induce current into the system. I plan to use this board to control a 24V ...
-2
votes
0answers
36 views

Velleman KA02 Problems [on hold]

I recently bought a Velleman KA02 Arduino Audio Shield (http://www.velleman.co.uk/contents/en-uk/p579_ka02.html), which uses an ISD1760PY audio chip and soldered it together. The first time I fired it ...
1
vote
1answer
87 views

Arduino analogread: neighbor pin noise on ADC even with big delay

I'm reading two analog input values (light sensors, with pull-down resistors) on an Arduino MEGA 2560. One pin is supposed to report the value of 0, while another pin is supposed to report a value of ...
1
vote
4answers
7k views

Arduino resetting while reconnecting the serial terminal

I wrote this code for the Arduino Uno. It will count a variable every second and send that count to the serial terminal. The problem is when I close the terminal and reopen it, the count will start ...
-5
votes
1answer
39 views

How do i connect my Nexys 4 Artix-7 Digilent FPGA board to my PN532 NFC/RFID Controller Shield for Arduino?

I am currently working on a FPGA project which i know nothing about. Truth to be told, I am learning how the FPGA and the Verilog language works from scratch and I am indeed experiencing lots of ...
1
vote
3answers
88 views

Photodiode and Arduino

I am trying to build a chrono to measure the speed of a projectile. I plan to use an arduino and photodiode. I would like the photodiode to change the state of the arduino's digital pin when an ...
-1
votes
1answer
42 views

Factory Reset a HM-10

I had programmed a HM-10 module to act as iBeacon with my Arduino Uno's serial monitor using the following steps: AT+RENEW Restores factory defaults AT+RESET Reboot HM-10 AT Wait for OK ...
2
votes
2answers
4k views

Problem of noise with load cell and INA125P + Arduino Uno

I am here with a problem that I cannot solve. Here are the facts: I have a load cell : http://www.robotshop.com/en/micro-load-cell-50-kg.html that I want to use in both directions, from -30kg to 30kg ...
4
votes
3answers
4k views

How to use the LEDs on Sainsmart protoshield

I have an Arduino Uno with a top-plugged SainSmart proto shield. There are 2 LEDs on the proto shield, but I don't know how to make use of these LEDs in a sketch. Are they directly controllable ...
-2
votes
0answers
37 views

VIsible Light COmmunication using Arduino for masters thesis [on hold]

I am currently doing my Masters in electrical engineering. As part of my Master's thesis I want to conduct some research/project in Visible Light Communication using arduino. I have a time frame of ...
0
votes
0answers
49 views

ATTiny84 blink mystery [migrated]

Novice mode, please. I programmed my ATTiny84 using Arduino Ethernet (Arduino IDE 1.6.7) using https://github.com/damellis/attiny branch - ...
1
vote
2answers
34 views

Multipurpose momentary button - microcontroller/arduino/esp8266

as more of a hobbyist than a pro I apologise if I'm asking the wrong questions, however I have been researching for a while and hoped Stack exchange might help. I've read a few articles on low power ...
-3
votes
0answers
26 views

1.5A micro motor driver transistor/IC for micro quadcopter-arduino [on hold]

im planning to make micro quadcopter using hubsan micro motors that i ordered from ebay (CL-0720-12) together with corresponding hubsan x4 proppellers. At max voltage (3.7V), motors load current is ...
-1
votes
0answers
21 views

iOS compatible Bluetooth module for high throughput [closed]

Suppose I want to transfer data from an AVR-based device (say ATMega2560, preferrably an Arduino) to an iOS device (iPad or iPhone) at a decent speed (at least 200kbps), what bluetooth modules are ...
-1
votes
0answers
23 views

Controlling 3 stepper motors simultaneously [migrated]

I have three stepper motors connected to the drv8825 drivers to an arduino uno. I am using the example code below (from here), which works fine for moving multiple stepper motors at the same time BUT ...
0
votes
2answers
50 views

Measuring Boltzmann constant using thermal noise

For my physics lab I have to come up with a way to measure Boltzmann constant using thermal noise. The circuit that I 'm going to use is something like the one in the figure below: Than I'm going ...
-3
votes
1answer
59 views

Voltage divider resistor power disipation [duplicate]

I am trying to create a power supply circuit for the ESP8266, using a voltage divider and a cellphone charger rated at 5V, 1A as power supply. I have resistors connected like this: The resistors ...
0
votes
0answers
57 views

Quick start on Arduino for experienced embedded programmer? [migrated]

I'd like catch up the Arduino concepts (programming & IDE). There are excellent online tutorials available for Ardunio but all of them which I saw are made for those who didn't have ...
5
votes
2answers
937 views

How can I control things without using delay?

I have always hated that you couldn't do other things while you used the delay(); function. However, I want to blink a LED or do whatever while using serial, but ...
0
votes
2answers
91 views

What are the different ways to switch power using a microcontroller (Arduino, Raspberry Pi, BeagleBone, etc.) and what are the pros/cons for each?

I'm using an Arduino to control a 12v water pump for a self-watering plant wall. I'd also like to use the same power supply for both, and probably need surge protection of some kind to avoid spikes. I ...
0
votes
0answers
27 views

ENC28J60 connected to Arduino on SPI

I have an Arduino Uno, that has been connected using SPI to an RC522 rfid board and an ENC28J60 ethernet board. SS1 for ethernet is port 8, and SS2 for RC522 is port 10. I can use the RC522 without ...
3
votes
4answers
4k views

Arduino serial communication fails when stalling/loading a DC motor controlled by PWM

I'm using the following circuit (from http://luckylarry.co.uk/arduino-projects/arduino-control-a-dc-motor-with-potentiometer-and-multiple-power-supplies/) to control the speed of a 6V DC motor powered ...
2
votes
2answers
958 views

ATTiny85. How do I use the reset pin as an analog input or digital output?

According to this datasheet, the ATTiny85 has 6 I/O pins if we include the reset pin. I used five of them to charlieplex 18 LEDs and I need another one to use as analog input. Would it be possible to ...
1
vote
1answer
129 views

How can I hook up a simple MOSFET to amplify the PWM signal from Arduino?

I have an 8-ohm 1/2 Watt speaker I'd like to hook up to the Arduino. I'm currently hooking up the gate of a FQP30N06L MOSFET to the PWM output of the Arduino. I've tied the drain to Vcc (5V) and the ...
0
votes
1answer
38 views

Ramps 1.4 stepper motor Slaving

So I am looking to run 2 stepper motors for x and y axis with a ramps 1.4 board, but since their are only one stepper motor driver per axis i was wondering how to accomplish this? (I'm thinking a ...
-6
votes
0answers
50 views

Arduino to arduino serial communication through serial1 port failed

I need to send array of data from one arduino mega to another arduino through serial1 port( pin 19, 20).. But I can't get correct data on receiver data.. Please someone help me.. Code. Sender. ...
2
votes
3answers
96 views

solar power ESP8266 microprocessor circuit to turn off when low voltage

I intend to run an esp8266 microprocessor on only solar panels so it is on during the day and off/disabled during low light conditions that do not supply sufficient power. Is there a circuit that ...
-1
votes
0answers
51 views

Powering an always-on Arduino

I need help designing a circuit to power my Arduino. The Arduino has to always be on(or on as much as possible), and my plan is to use a solar panel and two 3.7v rechargeable batteries to power it. ...
0
votes
1answer
27 views

Replace inverter manual potentiometer with mcp41010

I have an 3 phase ac inverter that uses standard potentiometer for motor speed regulation. The speed reference voltage is 0-10v and i need to control it using arduino. In MCP41010 datasheet I ...
1
vote
1answer
49 views

MOSFET output I on Arduino

I am trying to power a pair of TEC (thermo-electric cooler) using Arduino. I came across this guide that is used to power one. Because I have two, I want to know if I can still use something such ...
46
votes
15answers
28k views

Complete alternatives to the Arduino IDE?

I'm not that big of a fan of the official Arduino IDE (in terms of visuals), so I've started looking for nicer alternatives. However, most of the projects I've found are in alpha/beta and are ...
-2
votes
1answer
60 views

Arduino does not receives response over RS-485

I am using arduino uno to communicate with my industrial drive. I am using juan bester library for RS485 communication. Now here's what's happening: When I open serial monitor in my arduino after ...
4
votes
2answers
467 views

MCP79411 not “ticking”

I'm using the Microchip MCP79411 Real Time Clock. I can communicate with the device, read the MAC address from it, write to the EEPROM function and read back those values, but the Time and Date ...
-7
votes
0answers
44 views

Please Fix my issue [closed]

I would like to build a hexacopter. I have looked many resources to do this. I couldn't understand the starting point.I have been researching on net since many days. What is the basic knowledge ...