Let’s look more closely the RC truck we saw on the last page. Let’s assume that the exact frequency used is 27.9 MHz. Here is the sequence of events that occur when you use the RC transmitter :
- A trigger is pressed so that the truck to follow later.
- The trigger causes a pair of electrical contacts to the touch, completing a circuit connected to a specific pin of an integrated circuit (IC).
- The full circuit makes the transmitter to transmit a sequence of electrical impulses set (see how the radio for more details). Each script contains a short sync pulse group, followed by the sequence of pulses. For our truck, the segment of synchronization – which alerts the receiver to incoming information – is four pulses that are 2.1 milliseconds (thousandths of a second) in length, with 700 microseconds (millionths of a second) intervals. The segment of pulse, which narrates the antenna so that the new information is, uses pulses of 700 microseconds with 700 microsecond intervals.