I forced myself to use and learn about programmable logic chips. As I wrote in my older post, I have very small inventory of the chips and was forced to use Lattice isp2032VE110LT144 chip. I received great help reading article from Seattle Robotics Society web page. Also, at same time I was experimenting with controller-less LCD screen module. So
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I joined both ideas to one project and here is the result. The theory about LCD control was tested using big computer and MS Visual Basic software. CPLD programing software I downloaded from Lattice Semiconductors site. The chip was soldered to self-made testing PCB. I started ispLever Navigator and started my project from nill. I not too smart to wrote all signals is HDL (hardware description language) so I selected mixed type of the project: ABEL + Schematics. So I can describe some modules in ABEL language and connect all modules using graphics editor in schematics editor. I selected ABEL as I had some examples already written in it. In theory I need to feed LCD with clock, vsync and hsync pulses. It is very easy to describe column and row detection logic modules. Here is row detector (eiles. abv) In ABLEL language there are few mandatory fields: MODULE name of the module; declarations- declaration of the variables and wires; equations- the logic formulas itself. In this example we use whole bunch of wires or bus called a[] a8, a9, a10 and etc. up to a15. I collected wires to bus for easy description. In equations section we just test the bus for some value. The column detect is identical (stulpai. abv): The binary counter is a bit more complicated. I use two types of counters in this project- one is 4 bit counter for dividing frequency of master clock (count4. abl): This counter is created using example. I only...
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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