If you require obtaining more range from your RC car then there are many options available to you for consideration. Inside your RC toy car, there is a small electronic transmitter that sends out invisible radio frequencies to your receiver, which is your remote control you use to drive the car with. Usually most RC cars have a range of approximately 80 feet. With some electrical modifications, you can potentially increase the range up to 150 feet.
1) Increase the antenna size. If you use a bigger antenna for both the RC car and the remote control, you are going to help the signal travel further making it stronger. Try replacing them with bigger radio ones and experiment what works the best for your setup.
2) Increase the voltage that is provided to the RC transmitter inside your car. The more volts you send to it, the more amps it can utilize to provide a stronger signal. Make sure you don't run too much voltage or you might end up with a damaged transistor.
3) You could build or purchase a antenna RF amplifier. This will repeat the existing signal and will make it far more stronger and allow it to travel further.
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