If you`ve dabbled with PIC18F microcontrollers and the USB Generic HID standard before (perhaps you`ve even tried my Building a PIC18F USB device project) then you will have noticed that there is a lot of complexity in supporting USB on both the PIC18F and the Windows host-side of things. Getting beyond the basic steps of reading a switch and flashing an LED (how many
Click here to download the full size of the above Circuit.
projects have you built to flash LEDs !) is actually quite a large task with a steep learning-curve. To make things easier on the hobbyist who wishes to delve into more exciting projects, I`ve developed a framework for producing USB devices which covers both the Windows host-side application development and the PIC18F firmware itself. The framework consists of a Visual Studio C# class library (which handles all of the intricacy of dealing with the Windows specific SDKs and operating system requirements), a windows reference application (which demonstrates how to use the class library and acts as a testing front-end for the library), a simple USB hardware reference design and (last but not least!) a PIC18F4550 firmware which communicates with the class library. In essence this means that you can rapidly develop and test a USB device and the Windows host-application with a minimum of USB Generic HID protocol knowledge. The class library gives you a very simple interface to the USB device from C# and the firmware serves as an example of how to create the specific software needed on the PIC for your device design. The framework includes the ability to pass commands and responses to and from the USB device as well as bi-directional bulk-transfer of data allowing you to build more complex data-capture applications which require more information to be passed quickly from host to device and vice-versa. Version 3 of the USB library...
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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