For questions related to the remote control of devices and the design of remote controls.

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3answers
31 views

Using Bluetooth 4.0/LE verses RF

I am asking this question in hopes to get a solid answer from anyone who has direct experience dealing with the most recent RF as well as Bluetooth 4.0/LE developments. What I am essentially trying ...
-2
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2answers
50 views

Understanding circuit : Output of a CD4017 with 1N4148 diode and RC circuit

I'm reading a circuit on a magazine (look at circuit below) and i don't understand , why the author put a 1N4148 diode and a RC circuit at the output of CD4017 , what is the operations of the RC ...
0
votes
1answer
66 views

Replay Philips Livingcolors remote signal

I have a Phillips Living Colors Lamp, which comes with a remote control. I'd like to be able to capture/replay the signal of the remote control so I can control the lamp with a microcontroller ...
1
vote
1answer
50 views

Why does PC still get a little power from power socket turned off through remote control? [closed]

I have bought a power supply device to remote-control the power consumption at home. This works very well, however the PC has a little blue power light that keeps blinking from time to time even ...
-3
votes
1answer
56 views

Eflite Reciever Hack

I have the Eflite ELFH1025 reciever and remote I stripped from an RC Heli I had. The thing is that it wants to control everything and to make sure every component of the heli is functional before it ...
0
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0answers
39 views

Minimum effort remote solenoid

I want to mechanically press a button remotely with a solenoid and a remote controller in a range between 10-15 meters. What is the easiest way? Or are there any manufacturers selling a kit?
3
votes
1answer
174 views

RC LED “Bathroom occupied” indicator

I want to build a little LED indicator for my bathroom door. The basic idea is that when a person sits or stands next to the toilet, a little transmitter signals it wirelessly to the LED diode which ...
1
vote
1answer
72 views

Cloning Keeloq remote keyless entry system

Our house and a few other share the same gate, which is opened remotely by a 433Mhz transmitter. Unfortunately, we only get one remote per house, and we have two car. The company operating the gate ...
2
votes
3answers
279 views

Sequence multiple IR remote commands (button presses)

A bit of a story here: I would like to be able to quickly and easily turn on/off captioning on the cable TV box. Normally this would require 10(!) button presses. It's hard to be sure, but I expect ...
1
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1answer
94 views

Relay protection with MOV and RC Snubber

I am going to build a protection circuit for a 240 volt pump motor. It is believed that when the relay cuts out the motor generates voltage back into the relay and burns out the contacts. It has ...
0
votes
1answer
107 views

Can't get transistor to work correctly as a switch

What I'm trying to achieve: I have a 5V PWM signal that either needs to be left as-is, or converted into an analog 0-5V signal. How am I planning to achieve this? The PWM to analog conversion is ...
1
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3answers
109 views

Radio frequency signal transmitter

I lost the remote of an RC helicopter. I want to make a remote and know about the circuit. I am searching for this component which has three legs beside the LED in the pic. Would someone help me ...
1
vote
1answer
91 views

Activate garage remote via an Arduino

I have a RF remote control for the garage that I would like to control via Arduino. With a multimeter, I detected around 3v across the button. I have soldered two wired on either side of one of the ...
0
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0answers
108 views

How to switch a transistor when a radio signal is received?

I have a circuit which switches on by sending current to the base of one of its transistors. I'm trying to make receiver which can receive signals from a AM transmitter and send current to base of ...
0
votes
1answer
51 views

How to drive an ir sensor [closed]

I took apart a asus eee pc remote control and borrowed it's ir sensor to implement the remote using my arduino. I have a sketch I borrowed from ladyada so I can look at the raw ir signal. Since she ...
1
vote
4answers
142 views

Waveform generation with opamp

I need to design a circuit that generates the voltage waveform shown in the Figure 1 when an input voltage is applied as shown in Figure 2. Figure 1 and Figure 2 are in the second link below. Only ...
6
votes
0answers
120 views

Does putting a car remote on your chin make it more effective? [duplicate]

Recently asked on Physics.SE: Why does a remote car key work when held to your head/body? And also, similar claims abound. RF engineers know that putting a big conductive thing like a human head ...
1
vote
0answers
33 views

What does a tank ciruit work in a Cmos integrated circuit [closed]

It is a capacitance parallel to a inductance. I always find is hard to understand whether it has certain function in a circuit
1
vote
3answers
129 views

What's an analog way to measure only the on-time of a servo PPM pulse?

Hobby radio control receivers typically output a 1-2 or 0.5-2.5 ms pulse every 50 milliseconds, and only the duration of the high pulse matters. Now the best way to decode this signal is probably with ...
1
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0answers
93 views

Quadcopter plummeted into the ocean

We have a quad copter which had an arm partially detach mid-flight, which in turn destabilized the vehicle, plummeting it into the ocean. After two hours of searching we were finally able to recover ...
0
votes
1answer
35 views

Know the transmission speed between PICAXEs with Radio module

I was wondering if I could know the transmission speed between 2 PICAXEs using an Radio Module. At the moment I tried to send data between 2 PICAXE 40x2 only with the 433MHz Radio Transmitter. The ...
0
votes
1answer
155 views

Battery Elimination Circuit Powering Flight Controller

I am putting together a quadcopter, and one of the things I've stumbled across that I don't quite understand is Battery Elimination Circuits (BECs). The Flight Controller on my quadcopter is a modded ...
5
votes
0answers
105 views

How can I check if there is a signal from my radio-frequency type remote control (RC) [duplicate]

You can test the output of a television infrared remote control by photographing it with a digital camera - you see on the image if the infrared LED lights up. Is there a method, without an ...
2
votes
1answer
98 views

Convert TV Remote To NMT Remote

I've got a 4 year old LG TV remote control, which I recently took apart. I've also got a Popcorn Hour A-100, without the original remote. So my question is - given that I don't care about the ...
1
vote
1answer
114 views

Transistor as a mute switch, odd rise and fall times?

I need to mute (soft mute, no clicks and pops) an audio signal while routing it using a mechanical relay. I use a 2N5089 high gain NPN with a grounded emitter, collector to the signal output and the ...
2
votes
2answers
720 views

Longest range remote control

I would like to make a long range (5Km) quadcopter. As of right now, I'm just trying to find out the best way to control it. I know that there are some 5Km R/C transmitters but they are the size of ...
10
votes
2answers
381 views

Help with or hints for decoding an IR protocol

Some time ago I bought a simple and cheap little IR-controlled toy helicopter (same as this one - it's called "Diamond Gyro" or "Diamond Force"). For fun, I've been looking into controlling it via an ...
0
votes
1answer
72 views

Can a smartphone transmit over the 902-928MHz bands? [closed]

I came across a remote control that uses the 902-928MHz band. Can a smartphone transmit WiFi/Bluetooth over those frequencies? If yes, is there anything special about it? Thanks
2
votes
1answer
240 views

RC Circuit response to different input voltages

For an RC time constant circuit like below, what is the behavior of the circuit for different inputs: A Linearly rising input. A repeating Sine wave Square wave Based on the values I do ...
2
votes
1answer
161 views

AVR Interrupt “Interference”

I'm currently working on receiving signals from an RC remote. I have used pins A8 to A15 on my Arduino Mega board. The ports and interrupts are setup with the help of this code: ...
1
vote
1answer
654 views

RC Car mounted Raspberry Pi runs out of juice

I'm trying to make a Tamiya Blackfoot RC car run on a Raspberry Pi. I've written a small C program for controlling the servo and the ESC/motor with a wireless gamepad. Everything is working fine ...
1
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1answer
160 views

Nano Electric Receiver Switch - Circuit Components

I want to recreate the circuit board below, but I am having a hard time figuring out what components I need. I have been trying to look them up on mouser but I haven't got any results. It is called ...
0
votes
2answers
275 views

Making my own 38kHz remote

The issue I am having is it appears many modern remotes don't have a 38kHz carrier frequency for the infrared signal. I would get inconsistent readings using an TSOP 1738. Since the remotes you can ...
2
votes
1answer
143 views

Choosing voltage regulator and battery for a compact RF remote control (transmitter)

I'm designing a remote control based on a TWS-DS-6 433.92MHz transmitter and I wanted it to be really compact and energy efficient. I plan to have an ATtiny85 controlling the transmitter and use ...
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4answers
159 views

Increasing voltage to motors

I'm got a RC car, which can go forward and backward and it's supplied by ~5V battery. At this moment the circuit looks like this: and the board can swap ...
0
votes
0answers
126 views

Relay/TRIAC for water heater switching

I'm designing a remote controlled switch for my water heater and I am bothered by the following questions: Should the switch be DPST, or can I just switch the phase line (dangerous?) ? can I do it ...
2
votes
1answer
132 views

Can I use this Anker Astro 3e to power my arduino through the usb?

http://www.amazon.com/gp/product/B009USAJCC/ref=oh_details_o00_s00_i01?ie=UTF8&psc=1 Will there be any electrical problems? I'm building a arduino controlled car (with a chassis like this: ...
1
vote
1answer
1k views

Increase the range of RC controller

I got a old RC car + controller, I would like to increase it's range. I did a research and I found a idea here. The idea states: Here's what you do. Parts: one (1) NPN transistor. Tools: Soldering ...
0
votes
1answer
364 views

Using 27MHz car with 49MHz remote control

I managed to do something like this guy here, but after I connected the Arduino to the 49MHz remote control, I figured out that I have another car which works on ...
1
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1answer
105 views

Connecting RC remote to Arduino

I found a old RC Car. I'm electronic begginer, so my question might be dump, but I can't figure out how I can do this. I Separated the remote and connected it's power to the Arduino board. At this ...
2
votes
1answer
490 views

Cause of difference in theoretical and experimental values of RC time constants

What accounts for the slight difference in the theoretical and experimental values of the time constant in a simple RC filter? The slight difference was just (.5*10^-4) seconds
0
votes
1answer
135 views

Isolated closing contact other than relay?

I need an isolated closing contact, like a relay, but ideally solid state. Rating 24V 100 mA on the contact side would be plenty. 1 kHz operation would be enough as well. I will drive this from 5V 25 ...
0
votes
1answer
111 views

Remote Control Circuit

I tried to build a kind of R/C catamaran working with computer fans using an R/C car circuit (27 MHz). The original circuit uses 6V batteries but the fans uses 12V. To make the fans faster, I've given ...
1
vote
4answers
446 views

variable-speed focus PTZ protocol

I'm building camera systems to mount on top of a TV tower. When storm clouds roll, in the video is displayed on the TV weather report. No one wants to climb the tower to manually pan and tilt and zoom ...
-2
votes
2answers
129 views

Is there a device to automatically disconnect network or otherwise time limit a physical connection to a network [closed]

Is there a device to automatically disconnect network or otherwise time limit a physical connection to a network? The why? We are dealing with a production outage of large industrial equipment. The ...
1
vote
1answer
118 views

Connecting Arduino to a Monster iEZClick Remote

I am looking to do a project with an Monster iEZClick Remote Control using an Arduino Pro Mini 328. The Monster iEZClick Remote Control is an RF remote that transmits to an iPod socket connector that ...
5
votes
3answers
324 views

Recommendation for ADC noise filtering?

I'm using an ADC (adc081c021) with a pretty noisy input: There is also a 5-second video here: http://tinypic.com/player.php?v=2ue47cm&s=5 The objective is to detect the two peaks. How could I ...
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votes
2answers
111 views

iPhone control LED light without wifi

I am fresh to the electrical engineering, and actually I am a web developer, ruby and php, etc. I am wondering that is there a simple way to control one or more LED lights using iPhone without wifi ...
2
votes
2answers
218 views

What is the capacitor charging time when charged with a pnp current mirror circuit?

I want to use a 555 in monostable mode to make a ramp signal generator. The capacitor would be charged using a current mirror circuit. Given a input voltage, what would be the charging time of ...
-3
votes
1answer
170 views

How does remote switches learning system work? [closed]

I've been searching like crazy for none success so now im asking you guys. You know these electric control switches that you can turn on and off with a radio wave remote control? Usually the remote ...