This circuit interfaces a standard RC-control to a standard PC game port, see figure 1. The main target was to use the interface for the FMS flight simulator. The interface makes it possible to use a standard RC radio to control the FMS flight simulator under Microsoft Windows 2000 and XP. Of course, it also works under Win95, ME, 98. As long as y
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ou have a working game port (joystick port) on your PC you can use this interface. The system was developed and tested with a Hitec Flash-5X (35M) Digital Proportional Radio Control system, see figure 2. However, it should work without any modification with most RC controllers. The RC Transmitter (controller) sends a PWM (Pulse Width Modulated) signal to the receiver. The PWM signal is also sometimes called PPM (Pulse Position Modulation). The receiver decodes the signal and uses the signal to control servos etc of the model in use. The PWM signal is illustrated in figure 3. As can be seen by the figure a frame is built up of a number of channels, in this case four channels. The frames a repeated with about 50 frames a second. The circle in figure 3 focus on channel one in the frame. In figure 4 you find an enlarge picture of just that cannel. As you see in figure 4 the channel time is divided by two parts. TLow is always the same length and is about 0. 5 mille seconds. THigh on the other hand is variable between 0. 5 and 1. 5 mille seconds. The Thigh time depends on the position of the stick on the RC-control (transmitter). As you can see the timing changes from 0. 5 to 1. 5 mille seconds. By measuring the THigh time for each channel in the frame, we have a measurement of the position of the sticks. This is exactly what the electronics in RCPIS does. It does this by a help of a microprocessor. For a full...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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