• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

I need help changing remote frequencies on a remote control

Status
Not open for further replies.

techsys2

New Member
we are building remote control cars in my tech systems class, there is only 5 of us inlcuding the techer, but the problem we are having with the cars is that since they are so cheap they are all on the same frequency so 1 remote controls all 5, we want to "race" them and have little competitions with them, but we can't if the frequencies are the same, so i was wondering if anyone knew what we would have to do to change them, i will include a diagram from the car and the remote of the boards any help would be appreciated

thanks Keith, Kyle, Kyle, Dan
 

Attachments

nettron1000

New Member
I was thinking you could replace the crystal (CRY) in four of the transmitters but it appears the receivers dont use matching crystals.

From your schematic it looks like the receivers use inductive tuning, you could try tweaking the variable inductor ( L1 ) to tune the receivers to match the transmitter frequencies.
 

Sebi

Active Member
I agree with nettron1000, but in receiver need more tank circuit for increasing the selectivity. This receiver with only one tank cct. is relative wideband receiver, and can work with any signal in CB-band.
(I've seen a moving bear from Taiwan, who jumped from table when a taxi-driver say "break")
 

Attachments

nettron1000

New Member
Thanks Sebi, that original schematic was hard to look at.
 
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top