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1
vote
1answer
223 views

What is an antenna amplifier ? How does it add gain?

I don't know what exactly does antenna amplifier mean. Is it possible to increase the gain of a Tx antenna ? Where do I connect the antenna amplifier to it ? If, for example, the Tx has a power of 20 ...
0
votes
0answers
10 views

Bluetooth Low Energy Proximity sensing less than 2 feet?

I am working on a project where I need a TX and RX to be able to sense if the modules are within 2 feet of one another. Ideally, we would like to only utilize BTLE 4.0 for both devices since power ...
1
vote
1answer
31 views

Replace Electret Microphone With Arduino Output

I have the following circuit for a simple FM transmitter. I want to replace the electret microphone with a simple tone generated by an Arduino (or equivalent) that will be broadcast over FM radio. ...
1
vote
2answers
146 views

How to detect whether a bathroom stall is closed?

I've got a bathroom stall with a sliding bolt and would like to detect when the door is closed and locked. I'll receive the state of the door with an Arduino Uno Not sure what's the best way to go ...
-2
votes
1answer
47 views

Can I read coax signal entering through a coax usb adapter through a program? [on hold]

I want to enter a coax signal through usb to my laptop and be able to read it so as to stream it through the web so that i can read it elsewhere reversly (using another usb coax adapter and take it ...
1
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0answers
42 views

i want to make my own bluetooth shutter release thingy as first electronic project, what do i need? [on hold]

I want to make something like this http://www.amazon.com/JBtek-Bluetooth-Wireless-Control-Shutter/dp/B00JDMIOKO/ looks like it's a tiny microcontroller with a battery in the remote, but i'm not sure ...
0
votes
1answer
43 views

ATtiny85. How do I burn a bootloader? What is the process?

I want to use all six I/O pins of an ATtiny85, that means also using the reset pin as an I/O pin, however, I found out that if I disable the RESET pin, I can no longer program the ATtiny using an ISP ...
0
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0answers
47 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
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2answers
112 views

Constant Current Square Wave through LED

I am running a somewhat powerful LED, on the order of 3.5V 500mA, off of an ~11V battery using a constant current switched mode power supply from Ebay that uses the LM2596. What I need to do now is ...
0
votes
0answers
29 views

Arduino Broadband Peak Frequency Detector

I'm hoping to build a peak frequency detector, but am wondering whether I'm going to need more than just a couple of antennas. I'd like to be able to detect between 5Hz and 5GHz. So one question is, ...
5
votes
3answers
390 views

What should I use for powering a Raspberry Pi at near space altitudes?

I'm planning a high-altitude weather balloon project (to around 100000 feet) some time down the line to take video and pictures of near space altitudes and I have some questions I need to ask before ...
1
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4answers
458 views

Simple low voltage disconnect circuit for Arduino

Preface: Under impression to need a low voltage cut out, to prevent 2x AA NIMH rechargeable battery from being drained too now, and damaging them. (right??) In deployment this circuit will commonly ...
0
votes
0answers
14 views

What is the maximum frequency of the signal that can be plotted with MATLAB via serial communication from Arduino? [migrated]

I want to plot the various signals sent to Arduino via Serial communication. What is the maximum frequency that can be showed without any signal distortion? I'm basically trying to make a ...
0
votes
1answer
48 views

Atmega32u4 not detected

I have made a Arduino Leonardo clone and have been trying to burn a bootloader into it. I am still unable to connect to the Atmega32u4. It says "Unable to enter programming mode. "Unable to enter ...
0
votes
0answers
9 views

how to program atmega328 with arduino mega 2560? [on hold]

Due to some problems I'm not able to program my arduino uno. But my arduino mega is working nice. So can I program my atmega328 chip with arduino mega?
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2answers
39 views

Arduino: RS232 Level Shifter or RS2323 Breakout needed?

I am trying to establish communications between an Arduino Mega2560 (Master) and a customised controller (Slave) via a Master-Slave RS232 link using Modbus RTU. The communication should be ...
0
votes
3answers
57 views

controlling 3x BLDC motors

I'd like to control 3x L6234 IC's (3x BLDC motors) with the cheapest microcontroller/board/lauchpad but I'm a bit confused about the requirements needed for the microcontroller. As I understood each ...
0
votes
2answers
197 views

2.4 GHz versus 434 MHz transceiver for home automation

I am working on a project that uses an Arduino Uno R3 and will have one receiver and one transmitter. I'm going to use this for home automation within my home in India. I want to know which ...
0
votes
1answer
53 views

Arduino Mega & LIN Transceiver (MPC2004)

I am trying to connect an Arduino Mega with another device using a LIN Transceiver. I have decided to use a LIN MPC2004 Transceiver for this. I am now trying to understand the reference design of ...
0
votes
2answers
117 views

How do you control 130-size DC motors with an Arduino (seemingly 20A DC motors)?

I'm a little confused on specifications and limitations here... I have 3 (130-size, I believe) DC motors I'm attempting to control with an Arduino. They are running off of a 7.2V NiMH battery pack, ...
0
votes
1answer
62 views

How do I control a brushless DC motor without an ESC with Arduino

Is there a way to control brushless DC motor removed from a CD-ROM drive without using an ESC by using an Arduino.
0
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0answers
37 views

Arduino Types and versions [closed]

I am interested in develop a specific robot to my own work (a simple robot to perform a small tasks to enter this field ) so anyone please can recommend to me which versions of arduino I should use ...
1
vote
2answers
549 views

Single and Double Click on Arduino Multiplexed Buttons

On my arduino project i have 8 buttons connected to a 4051 Multiplexer. I would however like to add single and double click funcionalities to each of these buttons, but i can't find a way to do it. ...
1
vote
1answer
1k views

Stream Audio through Wifi Mesh network?

I want to put together a device that allows >= 128kbps audio to be streamed over a wireless (wifi?) mesh network. I'm a professional software engineer but have 0 experience in hardware, and I need ...
1
vote
1answer
519 views

Arduino project: ultrasonic sensor + 5M 5050 RGB LED strip lights

I'm relatively new to electronics, and as a newbie, I am seeking advice. I'm my current project, I would like to test out the combination of RGB LED strip controlled by one ultrasonic sensor. I am ...
4
votes
1answer
3k views

Arduino Diecimila (ATMEGA168) + JTAG ICE MKII Hell..Did I Fry the Chip?

Two weeks ago, I pulled out my AVR JTAG ICE MKII and successfully burned a few C programs to my Arduino through AVRStudio 4 SP3. Everything was working very well. Life caught up to me and I did not ...
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votes
1answer
69 views

125kHz RFID output interpretation

I'm using the RDM6300 125kHz reader module in combination with Arduino Uno to read my tags. The tags themselves have their ID as a label. When I then try to read the cards, I receive another ID as ...
0
votes
1answer
82 views

Start a teensy sketch after USB handshake has completed or upon a button has been pressed

I have an issue in starting a sketch on my Teensy at the right time. I work in a school as an IT technician and over the summer I go through all the computers on site, log-on and check if they're ...
3
votes
1answer
103 views

Floating supply and USB ground

I have a somewhat complex circuit controlled by an Arduino, which is supplied by a self powered USB hub (earth grounded 5V supply). A part of the circuit has to be powered by 12-20V DC. When I plug ...
6
votes
1answer
55 views

Millis versus centis on AVR platform

I am building a device on the AVR platform. The device will need some timing information, so I was thinking of reimplementing Arduino millis-like functionality ...
0
votes
1answer
68 views

Use Arduino to Plot the balance of my airplane propeller using optical sensor and reflective tape

I would like to use an arduino to determine how out of balance my airplane propeller is. I've seen a production device that uses an optical sensor and reflective tape to plot this. Can this be done ...
13
votes
3answers
3k views

Low power micro-SD card storage

We are building a low-power data logger based upon the ATmega328P, in order to make use of the Arduino boot loader and IDE, etc. Ideally power consumption should be less than 0.3mA @ 3.3V to get ...
0
votes
0answers
3 views

pcf 8591 arduino and labview [migrated]

Is it possible to connect p0cf 8591 adc / Dac kit to arduino through labview interface for arduino. i want to take data from analog sensor to pcf 8591 to arduino to labview for processing. Arduino is ...
0
votes
1answer
55 views

Integrating simple Bluetooth functionality without microcontrollers

I have recently bought a Bluetooth HC-05 Module, and have followed many tutorials on integrating it with an Arduino, or a microcontroller. However I got interested in whether it is possible without ...
0
votes
1answer
39 views

4015 with Arduino

I'm having multiple issues with this project. I know I've managed to screw it up, but I'll start with the basics. I'm making an LED stacker using an Arduino nano as a substitute for a 555. This ...
0
votes
0answers
21 views

Controlling ESC with Arduino [migrated]

I want to control these motors: hexTronik DT750 Brushless Outrunner 750kv with this battery: Turnigy 2200mAh 3S 25C Lipo Pack and these ESCs: TURNIGY Plush 18amp Speed Controller. I am new to this ...
0
votes
0answers
15 views

Help connecting an Arduino and an electronic speed controller [migrated]

We have this controller that we are planning to use with this motor. How do we plug it to the Arduino to make it work? This is a totally new subject for our school team, since we are mostly ...
3
votes
2answers
1k views

Arduino Mega 2560 stuck at uploading

I have two Arduino Mega 2560 boards, both gives errors when trying to upload sketches (I bought the second board thinking its a fault with the first one, but same thing happen with the new board). ...
2
votes
2answers
186 views

Arduino: Only reads serial input when Serial Monitor is open. Fails when it's closed

I feel like maybe I'm having a brainfart, but I've been searching around a lot. Setup: I have a Python script using pySerial that connects to the device and writes a line to the serial port @ 4800. ...
0
votes
2answers
576 views

Burn bootloader from Arduino Nano to Atmega chip

As seen from the above question, I need to know how to use an Arduino Nano to burn the bootloader onto an Atmega chip. The Arduino website only shows how to do it from an Arduino Uno chip ...
0
votes
1answer
106 views

Powering circuit and Arduino with single power source

I am trying to power an Arduino Uno as well as my circuit using Li-Ion batteries. They are 2 18650 Lithium Ion batteries (rated at 3.4 V each = 7.4 V total). I have this battery plugged into the Vin ...
0
votes
0answers
39 views

Using timers on an Arduino Mega 2560 [migrated]

I'm an amateur and I wish to use timers in my project. I'm using an Arduino Mega 2560 with a touch-sensitive screen with six DS18B20 temperature sensors and a DS1307 RTC (real time clock). I would ...
0
votes
2answers
268 views

Differential analog signal conversion using Arduino Uno

I need to perform a A/D conversion for a differential signal using Arduino Uno. I have tried a software method where I connect one input to A0 and another to A1, read ADC for both channels and then ...
0
votes
1answer
95 views

Two arduino unit communication

OK plain and simple I'm not sure to use IR or RF. This is short distance up to maybe 10 ft. I have an Arduino Uno that I have all set up here. I press a button and it carries out its code. This is ...
0
votes
0answers
8 views

Stream audio from smartphone to arduino [migrated]

Is it possible to stream audio from smartphone to my arduino? And if yes, what does it require? Does it require programming from the smartphone side? I know programming on the arduino. I have even ...
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votes
0answers
24 views

What does the line “while (! Serial);” do in an Arduino program? [migrated]

I'm new to Arduino, and I am trying a couple of tutorials. What does this line do in a program? while (! Serial);
0
votes
1answer
55 views

Strange problem with JY-MCU (HC-06) Bluetooth module

Short explanation: data sent over the bluetooth serial does not arrive correctly to the Arduino. Yesterday I connected a JY-MCU bluetooth module to my Arduino UNO R3 to test it. I connected the TXD ...
0
votes
1answer
45 views

XBee Power Consumption, RX Current and TX Peak Current

I'm trying to find out the max power consumption for an XBee Series 2 2mW module so as to pick out a suitable power supply for the system. The docs state that it has a TX Peak Current of 40 mA and RX ...
2
votes
2answers
280 views

Low frequency sinus generator

I would like to build a sinus frequency generator that can be controlled via an Arduino. Sinus frequency would be in the low frequency regime (below 100 Hz) with a voltage around 2.5 Volts peak to ...
2
votes
0answers
72 views

AVR program code location

I'm working with an ATmega328P and I wanted to interface with the flash memory writing data to it with the macros provided by avr-libc. This is the memory map for my chip: I don't understand where ...