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

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1answer
28 views

Ceiling fan speed control

I have heard it said that a ceiling fan with a built in three speed manual switch should be set on the high speed setting when using an electronic speed control. I have not found an answer as to why ...
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0answers
12 views

Reprogrammable Remote Power Supply Raspberry Pi Monitor and Control

I currently have a reprogrammable power supply (HCS-3400) hooked up to be controlled remotely from an control/monitor app provided by the power supply company, Manson. The supply is connected via USB ...
1
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1answer
51 views

Best approach for reverse engineering an RF Remote for a newbie

As part of a larger project, I would like to be able to replay signals of this remote. It's a remote for a temperature controller, operating at 433MHz and it looks like it's using ASK modulation. ...
1
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1answer
26 views

LED Remote, Isolating 2 channels

I previously had a simple remote that allowed me to turn the LED strips on my motorcycle on and off when parked, which then I also wired in a separate relay so that the strips turn on with the ...
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0answers
29 views

Use remote controller as keyboard matrix Arduino

I need to connect remote contoller directly to arduino without using IR channel, so just like a plain matrix keyboard. I guess that it is possible just connect remote lines and row to arduino directly ...
0
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1answer
48 views

Can any remote be used with an RC car? [closed]

I just bought this awesome H2 Hummer RC for $2 at a garage sale (the battery alone that was inside is worth about $100.). The motor works fine and the car is in excellent shape but it did not come ...
0
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1answer
46 views

Volume control?

Thank you for looking at my question. I have an electronics background from the military but I'm no engineer. I am trying to design a sound system with remote wired volume control in a chair. There ...
0
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0answers
30 views

Cannot get nrf24l01 working

Hi I have just started to study RF24 library for remote communication, I have two arduinos : UNO and Mega. I have connected this remote modules to them, also by this time I have soldered capacitor ...
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2answers
62 views

How can I connect a phone battery to TV remote control? [closed]

I have an old tv with an IR remote control. It has become quite bothering for me to change the remote control's batteries every other week. I thought to myself why not connect a Chinese phone battery ...
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2answers
39 views

ATmega32 withRC filter and OpAmp

In my circuit (picture below), ATMEGA32 output is connected to a RC filter (R=100K, C=10uF 63V) to non-inverting terminal of OpAmp (LT1006). OpAmp is configured as voltage follower (Buffer Amplifier). ...
0
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1answer
127 views

Is a 600+Hz R/C Servo/ESC refresh rate possible?

In the R/C multirotor scene, the trend at the moment is to have very high refresh rates on your ESCs (speed controllers). My understanding of how servos/ESCs are driven is a 1-2ms pulse is sent to ...
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0answers
146 views

Common mode RC filter of High-BW differential line

I'm using a fully differential analogue chain, using 20Hz HP, 3MHz LP and x2 Gain. My signal of interest is fully differential with a 200KHz fast modulation and a 100Hz sawtooth ramp. The high ...
0
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1answer
72 views

Is a toy's remote controller interchangeable?

This Christmas I'm buying a couple people remote controlled quadcopters. Then it hits me. Is there a possibility that the different remote controllers will crosstalk and wind up controlling a robot ...
2
votes
3answers
301 views

How does the automatic garage door opener know which button I've pushed on the wall control panel?

The wired wall control panel in my garage has only 2 wires connected to it. Yet somehow it acts different when I push the big "door" button than when I push the "light" button or the "lock" button. ...
0
votes
1answer
105 views

Help converting analog potentiometer to digital

I have a 3 dial motor control assembly that is using 3 potentiometers to control 3 independent 110v motors speed. The label on the pots read TO50K 1339 (first O has a "S" like shape inside). I have ...
0
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3answers
100 views

Different time constants for charging and discharging of modified RC circuit

I recently performed a test in an electrical measurements lab which left me confused. I measured the response of the following circuit: And obtained the following output: According to my ...
1
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1answer
79 views

How to “push buttons” on voltage ladder?

I have a quite simple task I can't wrap my head around. I have an old home 5.1 sound system with optical input that plays sounds from my media center. Its remote broke, and while I tried to fix it, I ...
1
vote
1answer
103 views

Why are the charge and discharge rate of Lihium Polymer Batteries different?

I have a 3S 1.3MAH Lithium Polymer battery with a 25C discharge rate, and a 5C charge rate.From what i know, the discharge rate is the rate at which the battery can be safely ischarged( i.e how many ...
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votes
1answer
104 views

What bluetooth chip / type should be used for a remote control car? [closed]

I am building a small remote control car to be controlled by bluetooth (iOS and Android). I am having a custom circuit board built, and I want to know what bluetooth chip I should get. I would like ...
0
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0answers
43 views

Custom IR LED controller for two independent strips

Is there a way to modify a controller with IR remote to control two separate led strips independently. Basically you have two strips, one controller, one remote and you can change the color|turn ...
0
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1answer
285 views

Length of a 40MHz antenna

A few days ago I had the brilliant idea of replacing the ugly antenna of a 40MHz car remote control with an extendable one. Now the range decreased from 50 meters to 3-4m. I don't know exactly what I ...
0
votes
1answer
89 views

Preventing Reset during ESD

I would like to design a RC filter to prevent reset to a SoC during a ESD strike. Assuming the reset net is by default low. And the reset comes from a separate board which connects to the main board ...
1
vote
1answer
190 views

Is it possible to use a XBee module to controll a quadcopter? [closed]

I'm thinking to design my own quadcopter and wondered if it's possible to use a XBee module to control the drone? The reason I'm thinking about an XBee module is because I want to be able to plug it ...
0
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0answers
111 views

Useing RC Switch Library for Transmitter and receiver in arduino

I have a RF remote and want to replace this with Arduino using RC Switch library. I want to sniff the codes from existing remote and send using RC Switch library in arduino. Is there any tool ...
0
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1answer
155 views

How to make power supply to 434MHz receiver module more stable on RC car?

Following the recommendations I got on my last question about troubleshooting communications in my RC car, I probed the +5V power pin of my RF 434MHz receiver module with my oscilloscope. Below is a ...
2
votes
1answer
275 views

RC toy car RF signal drops out when at full speed

Short version (TL;DR): I need help troubleshooting the radio communication of an RC car that I made. Every 5s or so, the connection drops out and the car spends about 1s without receiving instructions ...
0
votes
2answers
84 views

How do I hold a signal high from one high pulse?

Assuming I send a signal wirelessly to a receiver connected to a fan. if the receiver detects that a pulse is there, it switches on the fan. the fan should stay on until it detects another high pulse, ...
4
votes
2answers
392 views

Does a 40 MHz radio frequency have any interference to Bluetooth signal?

From my understanding, the Bluetooth signal is using a 2.4 GHz frequency. However, when someone is playing with a 40 MHz RC vehicle, the Bluetooth signal keep on getting interrupted or disconnected. ...
0
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2answers
53 views

RF remote with three buttons

I am trying to create an RF remote that has 6 buttons but the RF encoder only has 4 inputs. Is this possible and preferably I would not like to use a separate chip. This is what I am using: ...
1
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1answer
357 views

Specs of HK-TR6A remote controller receiver

I'm trying to use a 2.4 GHz digital 6 channel remote controller to send signals to an Arduino UNO R3 board. The receiver is the HK-TR6A-V2. I can't find any information on what each pin input/output ...
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0answers
192 views

BLDC motor control PCB

I am trying to make a PCB to control a Sensorless Brushless motor. I just wanted to know if it looks right. The IC I am using is a TB6588FG it has a 2.5A peak output current. I want to use it with ...
1
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3answers
78 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 ...
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2answers
159 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
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1answer
569 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
59 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
72 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
47 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
857 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
262 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
355 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 ...
2
votes
1answer
333 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
157 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
287 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
142 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 ...
1
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0answers
190 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
73 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
285 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
125 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 ...
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0answers
34 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
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3answers
150 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 ...