A very good example of code for EXTFSK that was called COMFSK. (The name has been changed to ExtFsk106) With the COMFSK plug-in, you can do PTT/FSK through legacy serial port, USB-serial adapter, or legacy parallel port (USB-parallel adapter not supported). See below for the file download. If you are using Windows 2000 or X
Click here to download the full size of the above Circuit.
P, you need the DLPORTIO driver. If you are using Windows 98 or ME, you do not need the driver. Read the document included in the COMFSK package for more information. Mori-san has declared that all the files including source codes in the COMFSK package can be copied, modified, used for commercial and non-commercial use. What a bonus! Many recent laptop PCs do not have a serial port. That is bad news for radio amateurs, because many ham software use the serial port for PTT, FSK, and rig control. Instead of the serial port, modern PCs invariably have USB ports. OK, how about a USB serial adapter Yes, you can use one for PTT and rig control. However, most USB serial adapters do not work for FSK, . It`s because they do not support 45 baud rate, which is too slow. It`s also because they do not support the 5-bit data mode. For FSK keying, MMTTY has been using the UART (baud rate generator in the serial port hardware). This sample DLL, on the other hand, uses the multimedia timer of Windows, and the FSK keying is fully controlled by software. The FSK signal can be output not only from TXD but also from RTS or DTR of the serial port, and data or strobe of the parallel port. The signal polarity can even be reversed. The timing accuracy depends on the multimedia timer and the CPU performance, but I think the recent high-performance CPU would offer feasible results. According to my experiences, the jitter was about 1 msec for 165 msec...
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.....
characters left: