So far the idea has been to show you how the Arduino Uno board and its Atmel ATMEGA328P microcontroller can interact fairly simply with the outside world. This time we`re simplifying the electronics but ratcheting up the demands on the microcontroller by aiming to hook up our Arduino Uno to the most complicated display output option available: tel
Click here to download the full size of the above Circuit.
evision. Composite video is the least loved video connection system by video purists because it delivers the worst quality (actually RF-modulated video is worse but that`s another story). Although composite video uses just a two-wire system it`s actually surprisingly complex because it has to incorporate not only the vision data but also the synchronisation information all on the one video signal. The vision data is the analogue representation line by line of what you see on the screen while the synchronisation pulses tell the display device where on the screen to display that data. Because we have limited processing power our Arduino can`t produce colour and it only has a low 120 x 96-pixel resolution. However that`s still enough to produce text and graphics and we`re going to make use of that in this project. If you go back far enough you`ll remember home computers like the Commodore 64 the Tandy TRS-80 and others all of which had processors barely pushing 1MHz but offered colour composite video output you could connect to almost any TV screen. Those computers used considerably more electronics to create the composite video signal. We`re going to do to it with just two resistors. The two resistors connect directly to two pins on the Arduino board pin 9 produces the sync pulses while the video is output via pin 7. Again like last month we`re standing on the shoulders of giants and using an Arduino library Arduino-TVout to...
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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