After all job of building the prototype and making the sketch work, it`s the time to build the circuit. It`s not the objective to explain in detail how to make printed circuit boards, but only a superficial explanation about it, besides, of course, to present the project changes to make it works out of Arduino board. Board designs are made with sp
Click here to download the full size of the above Circuit.
ecialized softwares. There are several available, including for free. In this project I prefered to use the CadSoft Eagle given it`s components library size available on the web, an interesting tip is also download the SparkFun components library that appear to have all components that they sell, a wide variety, and can save a big drawing time. The schematic is a circuit logical view that is a prerequisite for drawing the tracks and validate it later. Basically the requirements to run an Arduino project on an independent printed circuit board is a 5v power supply, a 16Mhz crystal oscillator, and, of course, link the microcontroller pins with all digital and analog ports of Arduino board. The diagram bellow is popular on web and explain how we need to draw the schematic to work as the prototype. It`s not the objective of this article to teach anyone to etch copper boards, for that there are several articles out there. But I`d like to make some important considerations. The method used for this project was the heat transfer with clothes iron. I tried before to transfer the printer toner directly as explained in some articles out there. But as each printer has it`s own characteristics is almost impossible determine a procedure that works in most cases, not to mention the various irons types and board sizes to be transferred. It`s also notable the copper deterioration of the printed parts, which suggests that the transferred...
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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