Whether you compete in RC races or are shopping for radio control vehicles for a child in your life, you can shop eBay for all the RC cars, planes, trucks, motorcycles and radio control parts and accessories you need. If you look inside the RC truck, you will see that it is very simple. Anyone who has driven radio control cars or flown radio control airplanes knows the thrill they bring. This decreases the motor's speed but increases the torque, giving the truck adequate power through the use of a small electric motor!
The motor's shaft actually has a gear on the end of it, instead of connecting directly to the axle. If the next pulse sequence were 40 pulses (reverse), the IC would invert the current to the same motor to make it spin in the opposite direction. For our example, the pulse sequence is 16 pulses (forward), which means that the IC sends positive current to the motor running the wheels. The pulse sequence is sent to the IC in the truck, which decodes the sequence and starts the appropriate motor. The remaining signal is converted back into an electrical pulse sequence. When the receiver receives the radio bursts from the transmitter, it sends the signal to a filter that blocks out any signals picked up by the antenna other than 27.9 MHz. The truck is constantly monitoring the assigned frequency (27.9 MHz) for a signal. If you have read How Radio Works, you will recognize this as pulse modulation. The transmitter sends bursts of radio waves that oscillate with a frequency of 27,900,000 cycles per second (27.9 MHz).
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