Re-Using a Toy Grade RC Receiver
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- Опубликовано: 7 сен 2024
- Re-Using a Toy Grade RC Receiver. I get regular requests about using cheap RC toy car receivers and transmitters so this is an extract from one of my videos that gives a bit of general information on the relevant connections. At some time I will do a dedicated video on the subject but this might help. On this receiver the motor outputs are labelled M1+ M1- and M2+ M2- on other receivers they may be labelled F/B for Forward/Backward and L/R for Left/Right. On this receiver the battery inputs are labelled VDD and GND on other receivers they may be B+ and B- for battery + and battery - You will see I have soldered leads with JST connectors on them to the relevant outputs and input so I can easily re-use this receiver in several different projects.
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Hello sir, can we replace that 2.4ghz radio system with esp32? I mean can we connect pwm output from esp32 to that receiver main ic? I think if that case possible, we can control that ic from mobile or pc with long range. That's will be interesting project 😅
Most of the toy grade receivers use an RX2 chip or similar. Here is a data sheet for a typical one www.diodes.com/assets/Datasheets/PT8A977B978B978BL.pdf and here is my playlist for my videos on the TX2/RX2 pair ruclips.net/p/PLA5a2xPRSrB1mLQvgf5ILMeTcRMuDtcNa and here is my video of building the test/demo circuit ruclips.net/video/M46Gpyl9KYE/видео.html
Hi, I know this might sound a little odd but would be possible to use a RC unit to trigger a rat trap?
I just need movement of about an half an inch to an inch.
Yes, if you look at my remote control door lock series I think you could see an easy adaption of the general idea. There are several different variations of the idea in this playlist so check out the video descriptions for the details Remote Control Door Lock playlist ruclips.net/p/PLA5a2xPRSrB1HM3Smxg8X-IG7dSuJyzkK
So i have a store bought rc. I want to put a bigger motor and battery but use the same servo receiver.. how do you do that in a nutshell?
The honest answer is buy a more expensive car and don't waste your time trying to upgrade. You will probably end up spending more money on the upgrade and end up with something that really does not work much better.
1. A bigger battery will kill the existing receiver. You would need to add electronics to allow it to handle the higher voltage/current. You can buy an H bridge module that could handle this.
2. A bigger motor will not magically fit into the same space the existing motor takes. You would have to cut the gearbox around to fit a bigger motor and it still may not align with the existing gears.
The existing gears may fail with any additional power, with the teeth being stripped off.
3. When I do upgrades I usually go straight to hobby grade RC gear. That allows you to use an ESC (electronic speed controller). That provides the correct voltage for the receiver and still supply higher voltage and current to the motor.
2005Silver is a good channel for upgrades to toy grade RC cars www.youtube.com/@2005silver he has done a whole range, but like me, he generally goes straight to hobby grade components.
In this playlist, I do a lot of videos using toy grade RC - ruclips.net/p/PLA5a2xPRSrB1f-x1-lufP6dnLQZWafj6v
If you still have the car dont put a bigger battery & motor in it. Just get a new chassis & other components. A bigger battery will make the car go faster, but may burn out the main PCB & existing motor.
I have a helecopter but don’t have the remote. I want to take the signal 2.4GHZ from another motherboard and put into the helecopter does this ever work?
In short, there are many different variations in the way that helicopters fly. There are many issues I can think of, that may give you problems. It depends what features your 2.4GHZ system gives you. If the helicopter steers by altering the speed of counter rotating rotors, then your controller would need to match that requirement. I would expect the throttle would be proportional, does your replacement gear do that. Does the helicopter have a tail rotor? Does it use it for yaw or pitch? The helicopter receiver boards often include gyroscopic stabilisation to help you fly, so if your 2.4GHZ system does not include gyro stabilisation you may struggle to fly, even if you can match the throttle and steering requirements.
i got a rc car but no controller with it how can i make it work with another controller
Assuming you are talking about Toy Grade RC, if it is the same frequency then you have a good chance it will work straight away, but sometimes even when the frequencies match they still will not talk to the receiver. You will have to find a matching controller or change the receiver to match the new controller.
@@GrandadIsAnOldMan how would you change the receiver for a new remote?
@@andrewwerstler8517 take the old one out and put a new one in. The wiring will be the same. 2 wires for the battery, 2 wires for the drive motor, two wires for the steering motor. So that is six wires you have to reconnect.
@@GrandadIsAnOldMan I was trying to make a drifter with a toy grade rc, but I didn't have the receiver. So I found a new bright receiver with about the same Hertz then adjusted the little screw you talked about and now it works and is pretty sic. Thanks for the useful video.
@@andrewwerstler8517 hey, that is great, glad it was useful 😊👍
I learn something new thanks
Glad to hear it 👍
Hello sir, Thanks for your videos. I have a toy grade radio shack 4x4 from the 80s, the transmitter crystal in the remote seems to be faulty, I was going to replace it but wasn't sure if replacing the crystal only in the remote would do the trick. It's an AM 27.095 MHZ. Can't seem to pin point the receiver crystal on the circuit board from the truck. Found old new stock transmitter crystal on ebay with same frequency, could this work? Thanks so much!!
Not sure how you have identified the crystal as being faulty. What makes you sure? I haven't made any attempt to change a crystal on any of the RC gear I have, in fact most of them do not have crystals to set the frequency. I would expect you to need a matched pair but I cannot give you any advice from a position of experience.
@@GrandadIsAnOldMan Thanks for the reply and information. To be honest I dont even know, just worth a shot, I am simply troubleshooting, I can't properly test the crystal I don't have those tools to do it. I know very little about relays, and such electronics but I like to learn about things and fix them. I know I could convert it to Hobby grade that I am capable. What happens here is that the remote is not making the car move, but some movement or jittering is happening like the car is trying to do something but can't. My thought, after eliminating many other possibilities, was there is a problem with the transmitter.
@@GrandadIsAnOldMan In my controller there is definitely a crystal transmitter with frequency inscribed on it, 27.095MHZ, but not in the car. It's a 1987 Tandy RadioShack 4x4, the yellow one.
I am afraid there are so many possible issues. You have to go through step by step. Ideally you would have an identical car that you could try swapping transmitters to check if it is the transmitter or the receiver giving problems. If you haven't already done this, you could do some basic checks like connecting a battery direct to the drive motor to check the motor is OK - do the same for the steering motor too. Although the crystal is marked very precisely with 27.095 many of the systems run over a fair range and you could try other 27MHz transmitters or try yours on other 27 MHz cars.
@@GrandadIsAnOldMan Hi again, my apologies for all these messages, your answers really help. One thing I remember doing is buying a toy grade RC from the thrift store that had the same 27.095MHZ freq, the car did the same with the controller, same response, so I pointed the issue to the controller. I could perhaps send you the circuit board from it and you could see if you find the problem. I would pay you of course. :)
Hello sir,I have an old rc car's reciver but I can't find the point which I can connect the battery
The termination points have various identities on the board. I will list the ones I have seen
B+ B-
Batt Eth
Vcc Gnd
V+ V-
Usually the battery positive is routed via a switch either onboard or externally.
The motor tags are usually labelled
F B for forwards backwards
L R for left right
sometimes they are labelled
M1+ M1-
M2+ M2-
The Arial or antenna is usually labelled Ant
@@GrandadIsAnOldMan sir I didn't found any of these on the board but what I did was checked for points,I checked if there was any of extra soldering or wire out of the joint.this plan worked and now the circuit is working correctly,Thank you for finding time for my comment
@@pascaledits7219 well done, great result 👍
hi Grandad, have looked but can't find. have you done anything on using a standard servo on the hobby grade receiver in place of the motor?
Hi Glen, thanks for commenting. Here is my standard cut&paste LONG ANSWER to this question. I am afraid that standard hobby grade servos are not directly compatible with toy grade RC receivers. They work in a different way. Hobby grade servos have a 3rd wire, that is a signal wire that the receiver uses to tell the servo controller board how far and which direction to turn the armature. The controller board in the servo then turns the armature the required distance.
Toy grade receivers just have two wires and have three signal states.
(1) Applying the battery plus and minus on the wires turns the steering motor one way.
(2) No battery applied allows the spring return to centre the steering.
(3) Applying the battery minus and plus on the wires turns the steering motor the other way.
If you connect the same two wires to an ordinary DC electric motor and apply "Left" the motor will keep spinning as long as you hold the transmitter on "Left". If you then apply "Right" then the motor will spin in the opposite direction.
In toy grade steering the only thing that stops the motor from spinning is the mechanics of the steering so the motor is still trying to spin but the steering arm has reached stop. On a hobby grade servo the electronics measure how far the steering has turned and stops the motor electronically.
Reversing the power feeding a hobby grade servo will probably damage the servo controller board, it certainly wouldn't make it turn the opposite way. If you remove the servo controller board and connect the output from the toy grade receiver directly to the motor inside the servo then it would go forwards or backwards like the toy grade motor but it would go all the way until it meets the internal mechanical stop inside the servo, so you would not have proportional steering. Also because the motor is heavily geared the normal spring on the toy car would not be strong enough to return the servo to the centre position when you want it to go straight, so you would be worse off than you were with the original toy grade steering. 😊
Here is my playlist - Working with RC servos ruclips.net/p/PLA5a2xPRSrB1nJ5I3Uzrjf41VCJzrab4p
GrandadIsAnOldMan cheers for the info i have got two identicql hobby grade RC cars on separate radio frequency that we are going to build 2 boat hulls from Foamex boards and put the mechanicals in. was hoping i could use a standard servo but i see the difference now and understand BBB the white signal wire
only issue I see with the conversion is the rudder and making the motor and mechanicals stop and function on the rudder. will see how we get on....
A proper Hobby Grade transmitter and receiver is not very expensive if you go for the bottom of the range without any frills and for a boat you won't be troubled by a lack of range. FlySky systems are pretty cheap on eBay. I have a couple and I always buy cheap 😊
GrandadIsAnOldMan absolutely i rate the Flysky it's a bargain. have always bought in a rush so potential to buy from one of the Chinese sites. was looking at converting the cars as they cost just £1 for the both a total bargain and hence trying a conversion for he cheapest possible price :-)
Hi sir I have an old board on it there is
LM RM
VCC GND
ANTENA
NOW WHERE SHOULD I PUT THE FRONT MOTOR USED FOR STEERING AND THE BACK MOTORS
PLZ REPLY.
Without seeing your receiver I can only guess where the terminations would be. Different manufacturers have different labelling practices. On toy grade receivers the motor outputs are often labelled M1+ M1- and M2+ M2- or they may be labelled F/B for Forward/Backward and L/R for Left/Right. I could guess that your LM and RM might be Left Motor and Right Motor (for steering) and there might be FM and BM for Forward Motor and Back Motor (for the drive motor) BUT that is just guessing. I have not seen a board with those markings.
@@GrandadIsAnOldMan OK bro it's OK but there is no
FM BM
what should I do
@@dr.monikarani1193 I am afraid the answer is get a different receiver unless you know how to trace the outputs from the control chip to identify where the signals are being sent. It is probably an RX2 variant chip so you can look online for the data sheet. You would be looking for the "H Bridge" that take the signal from the receiver chip and sends the power to the motor.
@@GrandadIsAnOldMan but there is two wires connected to B something like this
I think they are of steering because there is written LM and RM and also thanks you are helping me
But you can go and check my tractor in which I will use this board the tractor is in this channel only name of video is MODIFIED TRACTOR
And then plz suggest me
@@dr.monikarani1193 your video does not show the receiver you are talking about so that does not help me give you any guidance.
I have same circiut like it but it not work
There are plenty of reasons for it not working. Do you know if it was working at any time?
Here is a compilation of replies I have given to other people on other videos relating to toy grade RC.
A bit like asking an IT support. You say it doesn't work any more. Does that mean absolutely nothing happens when it is switched on and you operate the controller? Or do you have steering but no drive, or lights but nothing else. Those sort of checks would tell you if power is getting to the board from the battery. You would need to start with some basic checks like the batteries in the controller and the car. It would be handy if you could check your car with another controller of the same frequency and check your controller with another car of the same frequency so you know you are not focussed on the car when the controller is broken. Next you will need to take it apart and having a test meter would be very handy. A visual check would tell you if the wires from the battery box are still connected at both ends. A visual check would also tell you if the wires going to the drive motor and steering motor are still connected both ends. A car driven into long grass often puts too much strain on the motor. That causes it to draw more current and that becomes a 50/50 battle between the motor burning out or the power transistors on the circuit board burning out. You could check the motor by connecting a suitable battery direct to the motor terminals to see if the motor spins. However a burned out drive motor would not stop the steering motor running unless something really catastrophic has happened, so your description of "doesn't work any more" would seem to point elsewhere.
Toy grade receivers just have two wires per motor and have three signal states.
(1) Applying the battery plus and minus on the wires turns the steering motor one way.
(2) No battery applied allows the spring return to centre the steering.
(3) Applying the battery minus and plus on the wires turns the steering motor the other way.
If you connect the same two wires to an ordinary DC electric motor and apply "Left" the motor will keep spinning as long as you hold the transmitter on "Left". If you then apply "Right" then the motor will spin in the opposite direction.
In toy grade steering the only thing that stops the motor from spinning is the mechanics of the steering so the motor is still trying to spin but the steering arm has reached stop. On a hobby grade servo the electronics measure how far the steering has turned and stops the motor electronically.
On toy grade receivers the motor outputs are often labelled M1+ M1- and M2+ M2- or they may be labelled F/B for Forward/Backward and L/R for Left/Right. The battery inputs are labelled VDD and GND or they may be B+ and B- for battery + and battery -
RC TX2B and RX2B chips ruclips.net/p/PLA5a2xPRSrB1mLQvgf5ILMeTcRMuDtcNa
hackedgadgets.com/wp-content/uploads/2015/10/RX_TX.pdf
blog.tkjelectronics.dk/wp-content/uploads/2011/09/RX2_TX2_Datasheet.pdf
www.datasheets360.com/pdf/-3574820636171009157
RC toy grade modifications ruclips.net/p/PLA5a2xPRSrB1f-x1-lufP6dnLQZWafj6v
www.rcuniverse.com/forum/rc-radios-transmitters-receivers-servos-gyros-157/8295524-proper-antenna-wire-length.html
Infra Red Remote Control ruclips.net/p/PLA5a2xPRSrB0twF3brpsYS56Jv3iDtaU2
can you make a soldering iron homade
Ben Tennison did it a while ago using an old glow plug from a diesel engine. you need 12v source though.
The simplest soldering iron is just a big old screwdriver filed to the right shaped point and heated in a flame although a lump of copper would make a better tip. Lots of soldering irons are heated by a small gas flame instead of electricity so they can be used where there is no power available.
Hello sir, can I change that receiver to a Dumborc X6F receiver?
This video is talking about the very basic simple toy grade receivers. They only have two outputs. One for the steering and one for the drive motor. I am afraid I have not heard of a Dumborc X6F receiver, so I cannot give you any advice on that. You will find a little more information in the video description.
@@GrandadIsAnOldMan I have 2 X6Fs. You can install these in a toy grade chassis BUT you will need an ESC & steering servo. If you remove the main PCB board you will need to replace & add everything except the installed motor. The steering can be configured 2 ways, You can remove the main steering motor & rig in a stearing servo or you can take a servo apart and solder the server signal board onto the steering motor.
Thanks, I think you will find the question was about replacing the receiver 'one for one'. As you say, if you are going to fit a hobby grade receiver, then you need to add the rest of the hobby grade components. Interesting idea attaching the servo signal board onto the steering motor to drive the motor proportionally left and right, but unless you also have some method of including the servo's potentiometer won't you have a problem returning the steering to the centre position accurately. (I suppose you can leave the toy grade spring return in place and that might do it for you). I have done similar using an ESC to drive that motor and conversely, used the servo circuit board as a small ESC for small cars and boats 👍👍
@@GrandadIsAnOldMan Granddad the microprocessor chip will set the motors neutral position based on the radio (transmitter) trim. The receiver I think sends 5 volts to the steering servo. If you break down a steering servo, you see it has one of those rectangular brushed motors in them. A positive and negative wire are connected to the signal board and from the signal board comes the 3 receiver wires. I've seen so many people cut up the toy grade chassis when its cosmetically better to solder the servo's control board to the existing turn motor. The center reset spring can be removed. The end points are set on the radio.
Hi sir I had a question that can I use a circuit board without esc with 9 volts
It will burn or not can I use it with bo motor plz reply sir
That would depend on what the circuit board was designed to handle. If the car it came from used 4 AA batteries then it would handle 6 volts and using a 9 volt battery will kill it. If you want to use a higher voltage battery you need to change the H Bridge to a module that will handle higher voltages or intercept the existing motor feed and use it to switch relays that can handle the current/voltage you require. Here is a video that covers using relays ruclips.net/video/WK_G6DikXGg/видео.html and here is a video that covers replacing the H-Bridge with an external module ruclips.net/video/wIWNY1R5KZo/видео.html All my videos have extra information in the video description.
@@GrandadIsAnOldMan thank you
Sir my car remote central locking is not receiving signal from my key fob. I can't lock and unlock the car with the key fob. Please help me to repair it.
In your previous comment you stated "got it checked with multimeter. Actually, I installed aftermarket remote locking module. Now, the module is not receiving input signals from the key fob. Key battery is ok." so if you have checked the input and output of the chip on the relative pins you already know exactly where the chip is and how it works so you should be able to identify the chip number and search online for a replacement chip. I would not attempt to remove a chip from a circuit board myself without a proper desoldering kit. If you already have the skills to identify a faulty chip then there is nothing I can show you that you don't already know. I suspect it is unlikely control chip is faulty, more likely the motor control transistor or the aerial circuitry or even the buttons on the key fob. Do you only have one key fob? normally you would have two so you can check it is not just one that is faulty.
Maybe search RUclips for "aftermarket remote locking module" I did and I found this video along with several others ruclips.net/video/vx1t1ZOyP-E/видео.html
GrandadIsAnOldMan yes the control unit is the only issue. Keys are fine. However, that particular chip don't have number embossed on top of it.... please help more on this.
dear sir, can you please refer any video for designing receiver circuit for RX 2B IC.
If you search online for the data sheet for the RX2 chip you will find they usually include an example circuit.
@@GrandadIsAnOldMan is you are write but in that datasheet they have just included RF block not an individual circuitry. I have found some videos and text material for FM transmitter and receiver design. I think it will help me while designing a special RF transmitter and receiver for my line of work. Thanks for your reply
@@noumanshabbir6301 try this - it is the same as an RX2TX2 chip www.diodes.com/assets/Datasheets/PT8A977B978B978BL.pdf
Hii sir rembember I told u abt a reciever of mine .so I checked it when I connected multimeter it gave me just 2 volt ..on left and right at the rx .but at the motor only 4 volts on right no volt on left
Sounds like one of the power transistors in the H bridge is dead
@@GrandadIsAnOldMan can u pls tell me how to repair it. Can I repair it ...it is RC 2b reciever ..
I have no different answers or guidance to give you than I already gave you in the previous replies although I did this video last month that may help. You may have missed it ruclips.net/video/PdZJJi56Lu8/видео.html
I have a RX-6 reciever what freguency is that ?
I am afraid the number on the chip does not tell you the operating frequency. The frequency is set by the associated circuitry on the receiver board.
@@GrandadIsAnOldMan my car is made out of 1 circuitboard only how then i can tell wich freguency it is
@@GrandadIsAnOldMan mabye you have a email where i can send a photo to because i really wanna repair this car because it was from my dad his best friend which passed away couple years ago
@@jangofett3366 The other components on the circuit board are the items that set the frequency. Unless you have extensive knowledge of electronic components and radio frequency generation there is no way to tell by just looking at the board. Unless it just happens to have the frequency written on it. Some circuit boards have 27/45/49 written on them with a line through the correct frequency. The only other way to find out is to have a selection of controllers of known frequencies and see which one makes it work. The RX6 chip does not set the frequency, it can be used for all the toy grade receivers including infrared control. As I said twice now, it is the other components on the board that set the frequency. You could search online for the data sheet for the chip and that will probably give you example circuits and may even give you the values for those components for an example frequency. You would then need to be able to read the component values on the board to work out what they all are.
nice
Thank you 😊
Hola una pregunta tengo una placa de un carrito con todo y control pero el chip que tenia sequemo pero le puse otro y no funciona que puedo aser
There is no simple answer. You would need to do a step by step fault finding session to identify where your problem is. Start with simple steps like checking your batteries are in good condition and you have the + and - connected the right way round. Do you know if the new chip is a good one? Does your controller match? So many questions, to be answered.
@@GrandadIsAnOldMan mira todo esta bien el chip es de otra placa de otro carrito que no tenia control pero yo selo tras pase
@@GrandadIsAnOldMan lo solde y no funciona no tiene corto en tonses que se puede aser
@@GrandadIsAnOldMan tepaso mi número para que veas que chip es
@@CarlosMartinez-vy3nn there is probably a lot lost in translation here, but I am afraid I cannot fault find on your work for you. I have never had a controller chip go faulty. The usual fault is one of the H bridge transistors in the motor control part of the circuit has overheated. If that is the case, then changing the controller chip will make no difference.
How make transmitter
Personally I would not attempt to make one from scratch. Just sourcing the components would probably cost more than buying a ready made transmitter and receiver. If you really want to make one the standard data sheets for the TX2RX2 controller chip give example diagrams hackedgadgets.com/wp-content/uploads/2015/10/RX_TX.pdf but you can buy transmitter and receiver circuit boards online cheaply. These playlists may help ruclips.net/p/PLA5a2xPRSrB2KYw1ZgX_WHicdepBxjdka
ruclips.net/p/PLA5a2xPRSrB1mLQvgf5ILMeTcRMuDtcNa
ruclips.net/p/PLA5a2xPRSrB1f-x1-lufP6dnLQZWafj6v
Can you please do the jet boat
I will get to it eventually, I do a little to it and then get on with other projects 😊
Where is the rc reciever mostly found😎
I get mine from old radio control cars
Diagrame plzz
I didn't use one, but if you do a Google search for "tx2rx2 data sheet" you should find plenty of examples. The TX2/RX2 chip combination is used in most of the older toy grade RC systems.
Here you go, I just searched and came up with this example www.circuitstoday.com/5-channel-radio-remote-control