Most radio control helicopters consist of an operating system. This will ensure top functionality in every way.
In case you did not know, the construction of a control radio control helicopters system can be quite amazing! Begin by focusing on a single-channel remote modulated tone, which can be used for many interesting applications. In this first part describes the transmitter and the receiver will publish future editions.
Opening garage doors, slide projectors command and photo flashes, control toys, and many other applications may give to this assembly. It is now part of the rc world. Its scope is on the order of 50 meters, is compact and low cost of implementation. We turn then to the description of our radio control helicopters transmitter, which presents serious difficulties of construction, therefore, can be "faced" even for those with little practice in this type of installation.
System description
Let's start with the description of the system, which presents nothing unusual, and is essentially a simple project that is available to all. When looking to online diagrams, you will notice a block that represents both the transmitter and the receiver. The transmitter shall be fully described to understand and the receiver will become familiar, too.
The transmitter consists of two stages: one is of high frequency and emits its signal at a frequency around 72 MHz, the other low-frequency signal modulates the audio tone of about 1,000 Hz. The use of a modulated tone is interesting in terms of avoiding extraneous radio control helicopters signals that may come and shoot the control and thus induce erratic.
The receiver is the simplest form possible, with a super-regenerative detector stage and two-stage low-frequency amplification, the final link in the chain, have a relay which connects the circuit to be controlled. The transmitter operates with a 9V voltage you can achieve distances up to 50 m and the receiver operates with a voltage of 9V, also provided with a single battery.
The radio control helicopters transmitter can be mounted on a small printed circuit board and housed easily in a box approximately 5 x 3 x 10 cm. Readers who do not have the ability to mount in printed circuit boards or do not have what they need, can use the terminal bridge technique, but in this case the box that will hold the joint should be slightly higher. The only control of this transmitter is a pressure switch that makes the connection to its source. When this switch is pressed, the device emits the signal then the relay triggers the receiver to trigger the desired device.
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