As an integral part of an advanced computer science course in microcomputer systems it was thought that students could benefit from the design of a single board computer system based on a readily available microprocessor. This led to the project that is described in this paper. Most of the actual design work was done by James Antonakos as part of
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an Independent Study project. The result was a single board microcomputer system (SBMCS) that requires only a power supply and a serial monitor to be fully functional. This same project will be assigned to advanced undergraduate and intermediate graduate computer science students working in teams. A photograph of the working single board microcomputer system that was designed and constructed is given in Figure 1. The purpose of this document is to briefly describe the theory of operation behind the 8088 Single Board Microcomputer. The system has been designed to meet the following requirements: The descriptions that follow are based on the 4-page schematic for the system. Page one is the schematic of the CPU section, containing the 8088, an 8284 clock generator, an 8288 bus controller and address and data line buffers. The 8284 is needed to generate the clock, ready and reset signals. The 8088 may be placed into a non-ready state by grounding either of the RDY inputs on the 8284. Figure 3 shows the schematic diagram of the CPU module. The 8288 is needed to decode the 8088`s status outputs since we are operating the 8088 in maximum mode. In addition to generating the memory and io-port read/write signals the 8288 also controls the bidirectional data bus driver (the 8286) and the lower address latch chip (the 8282). Since the upper address lines are not multiplexed all we need to do is buffer them, hence the use of the LS244...
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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