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Questions tagged [remote-control]

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

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2
votes
1answer
122 views

How to observe the signals of a radio remote control using CubicSDR?

I have to admit I'm a complete newbie with regards to radio frequencies and such ... :-( Thanks to this site I've been able to find out what transceiver is being used in the remote control I'm ...
5
votes
2answers
816 views

Why IR remote waveform is a saw-tooth or am I measuring it wrong

The measurement circuit is as follows: simulate this circuit – Schematic created using CircuitLab The waveform looks like this in my measurement: Is this because I'm measuring it wrong and ...
1
vote
1answer
100 views

Find datasheet for an industrial radio remote control

At work, we have what seems like radio-based remote controls to control the window stores, the light and the temperature. We'd like to find out what the commands are that are sent by the remote ...
0
votes
1answer
43 views

How to Increase Velocity of a Servo motor, relative to resistance?

I am building a RC car which increase its speed to compensate any obstacle on its way. A simple 4 wheel RC car, with current sensor on the two front wheels, when an obstacle is placed in front of the ...
-4
votes
2answers
69 views

Is there a laser inside this remote control? [closed]

I wa at this store with furniture and saw this control and was looking at it and in the middle of one of the buttons there was a really bright green light under it and it felt like it stunned me I ...
0
votes
0answers
46 views

Locating ground and other pins on circuit board

I am a beginner attempting to learn how to hack RC cars like is demonstrated in this video. My problem is I can't spot the ground pin and the other pins related to the wheel drive functions except I ...
-1
votes
2answers
133 views

Can an IR blaster built-in to some devices damage appliances? [closed]

I once have a tablet (Samsung Galaxy Tab 3 GT-P5210) that has an IR blaster built to it. I sometimes use it to control the TV on our house if the remote is lost. Now, I don't understand that if I ...
0
votes
3answers
69 views

How to provide power to Arduino after a remote button is pressed

I have one of these IC 2262/2272 Wireless controller and receiver. If managed to connect it in such way that the Arduino blinks a LED after a button is pressed, it works fine. My question is, is it ...
0
votes
2answers
2k views

Keep relay energized longer with capacitor [closed]

OK, I've found plenty of questions about relays where either the person wanted to have event 1 at time T trigger the relay at time T+delay (like flip a switch and have the relay energize 2 seconds ...
2
votes
2answers
3k views

What RF transmitter and receiver to buy for long range

I have 3 main questions that I want to know. I mostly worked with computer science but recently I got an arduino to play around with. I also extracted some motors from an old rc quadcopter that i had. ...
1
vote
0answers
397 views

How to switch on PixMob-like led bracelet?

I've a led bracelet, which was switched on and controlled by concert organizer (the bracelet called 'fanband' and according to the official site controlled either by special remote or by sound). I ...
3
votes
5answers
261 views

Can adding a copper plane to the 2.4GHz antenna amplify signal strength?

Hello, I bought a 2.4GHz controlled RC car from a Chinese vendor. Under the car chassis, there is a 30mm x 20mm copper plane attached. Surprisingly, the customer's service team replied that "it's ...
1
vote
1answer
1k views

How to connect a 2.4ghz 4ch RC receiver to a brushed dc motor controller?

I currently have a 36vbdc 800w motor connected to a 36v 800w motor speed controller (similar to what they use to control ebikes) just like this one: https://aws.robu.in/wp-content/uploads/2016/02/...
0
votes
0answers
42 views

WEMO switch and Sodium lighting

Why can't the WEMO switch from Belkin be used with sodium discharge lights? I am investigating the purchase of a switch to remote control some driveway lights which I believe are sodium discharge ...
2
votes
2answers
2k views

How does this Pierce Oscillator work?

I am currently investigating on how to build RF transmitter and receiver circuits to try and build an RC device from scratch. I've come across this Pierce Oscillator Diagram and build it on a ...
1
vote
1answer
102 views

Are there any ways to improve this ISR - STM32F401RE?

I am currently coding a flight controller from scratch and am currently working on the module to decode the incoming PPM signal. Keeping in mind that this is an ISR, I've limited its functionality ...
1
vote
2answers
885 views

Transfer function of three cascaded RC filters?

I am looking for the transfer function of three cascaded RC filters: I have found the solution for two RC cascades (components differently labeled): I need an analytical expression like this one for ...
2
votes
2answers
166 views

Switch from one battery to another when one is discharged/disconnected?

I'm trying to figure out how to switch source power from one battery to another when one is dead or disconnected. the circuit needs to be able detect the loss of power on the jettisoned battery and ...
0
votes
1answer
62 views

Infra red remote control very short range

I bought a house that has a few LG split air cons. Whenever I want to use them I need to get like 2 meter close to them for the remotes to work which feels too short and annoying. These units are 10 ...
0
votes
1answer
180 views

My RC Time Const. Calculations are wrong. Circuit changes my input signal

I have a simple RC circuit of 22 ohms and 3.3uF My measured values put the resistor at 22.10 ohms and the cap at 3.15 which gives me a time constant of 68.5 uS The signal applied is a 100Hz Square ...
-1
votes
1answer
268 views

Crestar remote control operating frequency

I have tried very hard to find the frequency that my remote is using. I've took pictures of the inner board and the remote. Please help or guide me on how I could find the frequency.
2
votes
0answers
356 views

Reverse Engineering Panasonic AC Remote Control Circuit [closed]

I have a Panasonic air conditioner which comes with a wired remote controller CZ - RD513C attched to the wall and has no infrared. I want to make a circuit connecting to STM32F746 to automate the ...
1
vote
1answer
189 views

Android-Based Projector Remote Controller

I am planning to create an android application which is a remote control for projector. The android application should do the following: Control the Focus Ring of the projector using Stepper Motor. ...
-1
votes
2answers
283 views

RF reciever to detect unknown drone RC links [closed]

I am currently developing anti drone system as a project. Therefore,I am in need to make a RF reciever/Sensor , which can detect RC links(Drone-controller RC link) at multiple frequencies(488 MHz/2....
1
vote
3answers
161 views

DC Calculation: RC parallel to C

I've been running into problems calculating the DC behaviour the following circuit: simulate this circuit – Schematic created using CircuitLab When I try to calculate the voltage of capacitor ...
0
votes
1answer
122 views

RC Inverter delay

I was trying to solve the below question. A long wire may be considered as a series of RC element where R is the serial resistance and C is the ground capacitance. In figure 1, there is no ...
1
vote
3answers
2k views

RC circuit as clock source

I am not understanding something very fundamental here , I have read that an RC circuit can be used as a clock source. From this I assume a DC input. Playing around with my oscilloscope the only time ...
0
votes
1answer
1k views

Duplicating a KeeLoq Remote Control

I have been reading the documentations about KeeLoq Encoder and Decoders for some time. My goal is to build both the Transmitter side and the Receiver side using the KeeLoq system. I almost completed ...
0
votes
3answers
4k views

Can a RF 433.92 Mhz transceiver communicate to a RF 433.42 Mhz Receiver?

I am working on automating my Somfy Blinds. The idea is to avoid using the remote control which works on 433.42 Mhz and use a simple RF transmitter and an Arduino. The thing is that I can not find any ...
-2
votes
1answer
84 views

Can I make this RF remote unique? [closed]

I recently purchased several pairs of RF remote/receiver thinking I could use them to operate the lighting in my home (smart home). I soon found out that none of the remotes were unique, so every ...
1
vote
4answers
130 views

Is it possible to implement RC-5 not using interrupts?

The problem with my atmega8 is that I don't have the external interrupts INT0 or INT1 ...
1
vote
2answers
82 views

Turning remote control signal into audio

Is there a way to convert the IR signals from remote controls (for TV's, DVD players, etc.) into audible sound signals? There is a good circuit online, but it uses the CA3237E which is obsolete, so ...
2
votes
6answers
696 views

How is the remote control working

I am for the first year in electrical engineering so sorry for this question but i couldn't test it by my own. One of my lecturers said that the remote control of a TV saves the channel we choose, ...
0
votes
1answer
196 views

I want to make an RC skateboard that can easily take my weight and move me around. How do I go about deciding the electric power system?

Here are the details: Weight (skateboard + rider) = 75kgs Required cruising speed = 25kmph Required range = 15km Here are my calculations: To keep a comfy window, assume speed is 30kmph, and ...
2
votes
1answer
654 views

High side RC ESC switch

I've been designing a test bench for RC propulsion systems and for that I thought it would be nice to be able to switch the power to the ESC on/off. For this I designed a simple circuit which I ...
0
votes
0answers
46 views

Remote control switch for RC planes [duplicate]

could someone please explain why is needed to connect common grounds on rc switch. I am trying to understand inner working of this device and why connection with the ground has not been done ...
1
vote
1answer
420 views

Choosing values for a low pass RC filter?

I have to design a low pass filter to put at the end of a thermocouple. The Thermocouple has a 30.8mohm impedance. I am going to have a signal with noise at high frequencies. This AC signal has an ...
1
vote
4answers
781 views

How can I control two motors using only two wires? [closed]

Yesterday I bought an old RC Car from a junk sale. I assume this circuit has a built in motor driver, which is how it gets the forward/reverse of the motor working. This circuit is running of a 9v ...
1
vote
2answers
244 views

Can I connect a button on my motorcycle to the main button on a garage door remote?

I want to connect one of the existing switches (high-beam flash, or turn signal middle push button, or horn, or pretty much any other switch/button) on my motorcycle to the main switch of a garage ...
0
votes
0answers
433 views

Simple remote-controlled momentary switch

I need to create a momentary switch which is controlled remotely, preferably through IR from an old TV remote control (if possible), in order to answer my office door buzzer without getting up. On ...
2
votes
1answer
58 views

Add li-poly battery to projects

I would like to upgrade my RC project, changing from common AA batteries to li-poly. I've chosen them because I always see them in RC planes/cars. My model would require 7.2/9V and a max instantaneous ...
5
votes
2answers
1k views

Which are the input/output requirements of a 12V trigger interface?

For a personal project, I'm building a simple I/O control board for an audio module. This board has an MCU that implements all the I/O control logic, and some interfacing electronics as well. It will ...
-1
votes
1answer
56 views

Correct ESC amperage for a small electric motor [closed]

I disassembled a drone. I want to re-use two of its motors to build a twin-engine RC model plane. My motors are best for 3.7v, and according to their reference, draw 0.18A-0.20A of current. What ...
0
votes
2answers
339 views

Why do the motors for my Arduino RC car not respond to any command after the first command is received sometimes?

I'm making a mini RC car with an Arduino nano and wireless communication with RF433, with 2 motors with 2 motor drivers (L293D). I use 4 1.5V batteries to power the arduino nano and another 6V battery ...
0
votes
1answer
69 views

Connecting a RF antenna

I have one of these devices: To control 4 rgb leds on a pool. I googled some sites that show this exact device and it seems to work with the 433Mhz frequency (I bought a box that included the power ...
0
votes
1answer
112 views

What are different ways of remote communication two circuits?

I am doing a project which requires remote communication between a microcontroller and a circuit containing 2 stepper motors. I am using a PIC24FJ32MC101 because that's what I had laying around the ...
0
votes
1answer
353 views

Rc crawler - make it faster/longer range? [closed]

Apologies as I am on a phone at work - but obsessed so here we go hah. I bought a rocksta crawler, from hobby king. Cool for what it is. But it's deathly slow. Like 25cm/second. Its a great crawler ...
1
vote
1answer
130 views

Implementing a simple 1/s integration in PSCAD while it only offers 1/sT

So I'm doing some modelling in a power systems simulation software (PSCAD) I'm using the integrator block in that software. Now unlike SIMULINK PSCAD doesn't offer a \$ 1 \over s \$ block but offers ...
0
votes
1answer
348 views

ESP8266 controlling RC car. Voltage drop, ESP shuts down when I increase motor speed

I am preparing remotely controlled RC car using Android phone and ESP in TCP client/server configuration. I power it using 4x AA 1.2V batteries (2500mAh). The problem occurs when I try to accelerate ...
8
votes
5answers
6k views

TVS diode before or behind resistor

The best way to protect AVR pin for me is RC filter and TVS diode but I don't know one thing. I've seen schematics where TVS diode was before RC filter like in first schematics. simulate this ...