This video might be 4 years old, but it's still solving parents problems. I had this same issue and you just solved it. Thank you very much for sharing you knowledge.
Great instructional. My son bought two RC cars with his Christmas money and waited anxiously for them to arrive. He was very disappointed that they were on the exact same frequency. I was sorry for him and assumed it would be far too complicated for me to fix with him. He found your video and showed me. NO JOKE 10 minutes later, we had race-able cars! THANK YOU!!!
accidentally got 2 different RC cars with the same frequency! I followed your video, it wasnt as straight forward. I had to tweak to and fro between both cars. But eventually I managed to change it. Now my kids can play with their cars together. THANK YOU!
If there is a crystal and the transformer internal magnet is cracked would that cause it not to work? Could replacing the transformer make it work perhaps?
Thanks mate! Really helpful vid. Bought two RC cars on eBay sold as 2.4Ghz but after opening up everything as you've shown, turns out they were both 40Mhz...
Good tip, thanks for that! Just a question: any recommandations regarding how to manipulate that "special" screw? It is not metal, seems like a "rocky" screw. I just destroyed one.. right when i was happy to see that i can change the freq on the rc. Can that screw be replace with a metal/ normal screw?
4:00 The racing one has screws hidden behind the hubcaps which need to be popped up, after that you can remove the wheels and access the underneath screws! 6 years later later, your video is still relevant! Thanks
Thank you so much. I had bought two cars both operating at 27 Mhz for my kids. Followed your video and was able to tune a pair of remote and car to work at a different frequency.
This is one of the best how-to videos I've ever seen--excellent visuals, very clear explanation and demonstration, and zero time-wasting "fluff talk." Thank you so much!
This is SO awesome!! We got the same cars for Christmas (well, the fire truck and police car from the same company) and it just turns into a toddler death match when one of them unwittingly moves the other one's car! You are a lifesaver!
In my case it was half-true as pad had freqency set on static crytal, but car could be tuned as on your video while i resoldered crystal. Great instruction!
Reverieru I've just opened up both of my kids cards and found they don't having the tuning pot, can you share details of the crystal you changed to, looks pretty straight forward swap if I can source the right component.
Same here, from AliExpress for the 2 little ones and one kids wasn't very happy. I hoped for an internal switch. Thanks for easing my mind and helping that the kids can both be happy today. You are my today's hero. Oh and a great Dad too.
Ok, I messed up. Having both cars close by each other was a problem as both were picking up the signal no matter how much I turned it. I realized it changed when putting more distance between them. Just all that turning with a too little screwdriver broke eventually the metal core ot at least it cannot be any further be turned. Yes, that happened on both :( Now, we have 3 unhappy people. Take care.
Sir, After watching your video I tried to adjust the frequency of my son's toy car remote. But, somehow the transformer core broke and came out. How to fix it?
Lol Amazing.... I have so many of them since years... but dint knew we could change this. In college days we tuned the transformer of Radio in electronics lab but here dint think of it. Oh my my
I would like to ask the following. I have notice that most rc toy cars at 27 MHz with only forward and backward function(meaning without left and right) start by themselves, without using the transmitter. Do you know why this is happening? In order to exclude other radio waves sources I have closed the rc car in a box which is wraped with aluminum foil and it steel starts by its self. Have you notice this kind of behavor in the rc toy car you are using in your video? Do you have any explanation why this is the case for the most rc toy cars with forward and backward function only?
at 1:22 you can see how simple the transmitter circuit is, I did not measure the output frequency of the transmitter, but I am guessing different between forward is a minor change in the modulating or carrier frequency. This makes the 2 mode transmitter quite cheap. I did not have these cars very long, but it would not surprise me if they move forward or backward "on their own". I believe this occurs due to a cheaply designed modulation technique, so the car will react easily to ambient radiation. Similar to how how a lightning strike will cause an AM radio to make a pop noise.
Thank you for your fast reply. One last question. In order to block the ambient radiation I have created a faraday shield by taking a box and wraping it with aluminium foil and placed the car inside the box. I have checked that the shield is ok( the rc car cant take the signal from the transmitter). But the car steel moves "by its own'. Do you think that this is due the internal circuit of the car? A capasitor maybe? Since,all external radiation is blocked. Do you have any idea on how to check that?
I have tried making my own Faraday cages/shields in the past, and device inside was still susceptible to external to noise, this i believe was caused by poor construction and grounding on my part. Electromagnetic interference (EMI) in theory should prefer to travel through the metal foil therefore significantly decreasing the amount seen by the device within. Have you tried controlling the RC vehicle with the control while it is inside the Faraday cage? I suspect that the the car's receiver is too "sensitive" meaning the communication protocol is poorly designed to ingnore EMI. For example more modern communications require an initial sequence before listening to the incoming signal. Initial sequence "10110101"(Hi there) immediately followed by "00001101" (reverse). There could be internal circuit noise that triggers the move forward or backward command. Good luck I hope you can find more info online.
Yes I did tried to control the car while it was inside the Faraday cage and the transmitter couldn't reach the car's reciever. Anyway, thank you once more for your time and help.
Thanks! I bought a couple of RC monster trucks ( RCG Racing 1/16 4WD Rock Crawler RTR) for my son and myself. Same thing as above they both were controlled by the controllers. 5 min with this video and the problem is solved! You've made a very excited 3 year old very happy 😊
Hello bro, I got 2 rc bus with 27mhz transmitter and receiver. Transmitter in remote doesn't have variable transformer to change frequency. I see 27m & 49 m . But no option to change to 49m. How to adjust the frequency in remote. Please help
Glad I found this. I want to get my twins their own rc cars for their birthday. I knew the frequency issue would cause a problem. I'd like to avoid three-year-olds' in-surround-sound meltdowns and frustrations. Thanks!
I have 8 rc helicopter but they are various types friqunez and also I have one transmitter that can operate the one of the rc helicopter but now have to operate all other rc helicopter it possible or not in yours way
I've got one car that is 27.145 and one coming which I hadn't noticed until after I'd bought it that says it is 27. Will they interfere with each other? I'm guessing so. Might have to get the old screwdriver out!
I have the same model car but remote doesn't have same PC board. Instead it has Crystal soldered straight on board and can not be changed without removal.
The problem is my rc remotes has 27.145mhz crystal, i guess this is the legal frequency,i need to get a nearest frequency crystal but luckily the receiver has a transformer
Buy CB Crystal then. They are cheap. Solder them into the car and remote. 27.405 is channel 40 or any u please. Just some fyi. What he did was NOT legal. It could be transmitting anywhere right now on his end.
I broke the "Adjustable High-Frequency Ferrite Core Inductor" aka transformer on my kids rc car while trying to turn it with a screw driver so now I'm going to buy a pack of 10 of them on ebay for about $2.50 and try to solder one on and get his car going again. Anyone know if there's a special "tool" to turn these little things or if a tiny flat head screwdriver is the best option (that's what I used when I broke it)?
Great mod but you may have turned the remote to another frequency not legal for rc cars...simple fix though, get another cheap rc car that has a different frequency and tune the remote to control the new rc. Stupid that the toy makers didn't send cars on different frequencies though...
Wish it was as easy as that for all RC stuff but thats life Bet your family love you with those sirens going all the time I used to know one mum when the batterys when flat they never got replaced in noisey toys until i started going out with her and started replacing the battery's lol
I added a 2.4 ghz Bluetooth speaker on my 27 mhz rc car, and the car stops responding when the speaker is turned on, does the two different frequencies affect each other? I need this for a school project, pls reply.
It will affect it to the point of swamping the mhz range , the higher the frequency the more tightly packed the waves thus the gigahertz rf will fill the megahertz wave signal and basically block it by overwhelming the 2.7 mhz.
