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0
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0answers
19 views

How to do 2 way communication

I use CC1101 433MHz RF-module with PanStamp library to make a 2 way communication. I have finished transmitting and receiving the data, like in the code below: Transmitting: ...
1
vote
1answer
38 views

How long does ultrasonic rangefinder last

I've built a parking sensor in my garage that uses the HC-SR04 ultrasonic rangefinder and an arduino to measure how far the car is from the back wall. The one thing that I'm worried about is if the ...
0
votes
0answers
26 views

Is possible to get very narrow beamwidth antenna?

Is possible to make 60 dBi sector or patch antenna by make its beam width 0.17°/0.17° only ? how to calculate ideal dimensions against frequency at this range of beam width ?
1
vote
2answers
148 views

+5v and -5v power

I'm building an analog switching circuit which is controlled by an arduino. My circuit requires 25 4066 quad-analog switches. To get the required analog voltage range for the switched inputs, I ...
1
vote
1answer
46 views

High Frequency Logic Level Conversion

I am using Arduino DUE for my project which gives a 3.3 volt output signal. I have to convert it to 5 volts to use it with another device. The problem is that my signal frequency is 1 MHz. I have ...
0
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0answers
7 views

Arduino if else code [migrated]

I have made this If-Then-Else code, but it doesn't work. First I tough only the analog code is wrong, but if I take a digital port, the code doesn't work either. What did I do wrong? ...
-2
votes
0answers
33 views

Android Compatible microcontroller [on hold]

I am looking for a micro controller like arduino or Raspberry PI which runs the Android SDK and can access Wifi , 3G and GPS. i am aware that it requires wifi shield and 3G + GPS shield but what i ...
0
votes
0answers
27 views

Bipolar stepper motor (Alfa Romeo 156 speedo) w/ L293D

I would like to use my Alfa Romeo speedo in my simrig, I have got the cluster pinout and the speed signal is coming from the ABS (Just like any other car, my BMW cluster works like charm). The only ...
1
vote
2answers
63 views

Digital trimmer capacitor

We would like to design an FM transmitter module for Arduino boards. Therefore, we are in need of a trimmer capacitor that can be controlled digitally. Do digital trimmer capacitors exist or do you ...
0
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0answers
49 views

Arduino with 6 motors controlled by Android device

For our first year engineering project, we are creating a guitar tuning device. We will need to control 6 motors, each turning a small knob (<1 inch) against a 10-20kg string tension. Manually ...
0
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0answers
7 views

X-CTU will not detect any of my XBee modules

I have a few XB24-DM modules, and I can't get X-CTU to detect them. I have tried the latest (6.2.xx) and 5.2.8.6. The old XCTU will at least respond when I push the button on the Shield when it asks ...
0
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0answers
18 views

134.2 kHz arduino reader [on hold]

I am looking for an Arduino-compatible RFID reader supporting ISO 11784 & 11785 and reads a frequency of 134.2 kHz. Can someone point me in the right direction.
0
votes
3answers
56 views

Calculating gain of multiple antenna system

Some radars have thousands of antennas, there are also some routers that have multiple antenna systems. But I want to know how to calculate total gain of multiple antennas in a system? Is it simply ...
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0answers
39 views

heavy urban 1200 km best band ? with no sky support [on hold]

what is the best band can propagate 10 kbps of data from chicago to newyork by direct wave or groundwave "no any skywave support" ? how to calculate path loss at this long range ?
0
votes
0answers
8 views

Is my Arduino UNO fried? [migrated]

The title sums it all up. While testing the new proximity detector I bought off of Amazon, a spark flew from some random area and my Arduino's On LED went off while its Loop LED stayed in a dim ...
1
vote
1answer
33 views

Current on Easydriver stepper pin

I am using an Easydriver v4 to drive a bipolar stepper motor. The Easydriver works fine, if I wire it up and manually toggle the step pin to 5V/GND it steps as intended. Now I connected both the step ...
0
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3answers
99 views

How to measure amperate going through a 220V cable?

Meta objective: I want to pull up a TV with a winch, when the TV is turned off. I can already move up and down the TV invoked by my controller (Arduino Nano). The physical push-sensor stops the winch ...
0
votes
0answers
25 views

Why I can't connect more than one Arduino UNO + Ethernet Shield to my network? [migrated]

I am using 3 Arduino UNO with a Ethernet shield, each one is connected to my Home Internet Switch with a Ethernet Cable. Each Arduino UNO is collecting temperature/humidity for each bedroom in my ...
1
vote
0answers
23 views

Can't drive adafruit display with Arduino DUE

I'm currently trying to write a library for the Adafruit ST7565 graphic display. (see links below) The current one is entirely AVR specific and the code is generally pretty unreadable given the ...
0
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0answers
18 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 ...
2
votes
1answer
288 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 ...
1
vote
1answer
38 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. ...
-2
votes
1answer
59 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 ...
0
votes
1answer
51 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
52 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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0answers
55 views

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

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
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0answers
31 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
409 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 ...
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
12 views

how to program atmega328 with arduino mega 2560? [closed]

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?
0
votes
2answers
44 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
64 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
120 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, ...
3
votes
1answer
108 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
57 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
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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
59 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
43 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
1answer
66 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
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 ...
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 ...
-1
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);
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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 ...
0
votes
1answer
61 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
60 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
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
0answers
67 views

Simple Circuit To Light Up OLED

I'm a ICT student and need to make a circuit to light up an OLED. we have developed an OLED but have some trouble with the power supply. We need to have an arduino so we can send an PWM-signal to the ...
2
votes
0answers
76 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 ...
0
votes
0answers
46 views

AVR ISP error programming ATmega32u4

I have made a custom board based on the Arduino Leonardo design. It is an exact Leonardo clone. I am trying to program the bootloader via the AVR ISP tool. I am getting the message as follows - ...