Though the primary target audience of the USB08 Reference Design are Developers of Mikrocontroller Firmware and Hardware, Windows Driver and Application Software issues are also covered by the USB08 Project. USB (Universal Serial Bus) is a standardized bus interface to connect peripheral devices to a Host Computer. Since the build-in USB support o
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f Win98/Win2k, USB has become available on nearly every new (Windows-based) PC. The USB specification is an industry standard maintained by USB. org, which exactly defines this bus system beginning with the electrical interface up to the higher protocol layers to guarantee the inter-operability of all the different devices. A simple way of handling is the most important requirement for USB devices from the view of the user. Several versions of the USB specification exist. The USB08 Reference Design is based on the already established USB Specification Revision 1. 1 (local copy). The HC908JB8 (more precisly: MC68HC908JB8ADW) is the Microcontroller used for the USB08 Deference Design. It is a low-cost 8-Bit Mikrocontroller from Motorola. It belongs to the HC08 family, one of the most popular microcontroller families used worldwide. Despite the integrated USB interface, the `JB8 has 8KByte internal Flash Memory, which is in-system programmable and erasable. More information about the HC908JB8 can be found on the Motorola Microcontroller Website. Check out the CPU08 Reference Manual, the MC68HC908JB8 Technical Data Book (local copies). Check out the Schematic Diagram of the USB08 Eval Board. A bill of materials as well as the circuit description are included in the USB08 Designer Reference Manual. Two ways of communication are implemented in the demonstration: RS232 and USB. Therefore, a developer experienced with RS232...
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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