The music equalizer display schematic is not a very difficult one to build. I managed to fit it all on a nice little breadboard. You will need all the parts listed out on the previous page to put it together. It is quite wire-intensive so make sure you have plenty of extra wire handy. The audio signal that the laptop generates will be input into
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RA0/AN0. In order to be able to hear the sound as well as to see the signal on the led`s we`ll stick a speaker in parallel with the input to the PIC. This will decrease the true voltage of the audio signal that the PIC sees however we`ll deal with this issue in the PICs software. The 2 1k resistors are used to create a voltage divider for the analog to digital converter`s reference voltage. This means we use these two resistors to have the audio signal compared to 2. 5v instead of 5v. The reason we do this is because the audio signal that is input is low voltage and if our reference is closer to it the output to the leds will be far more accurate & entertaining to watch. After all the analog to digital conversions are complete these three ports will be used to output the result. It is updated once every 0. 2 mS which is right on the border of too fast. An update rate of 1mS might be better. The reason for the update delay is so that there is enough time for the leds to light up. The power circuit design for this circuit is simply hooking the battery up to the PIC. This is a bad design as 5v batteries are not common, however the circuit is simple enough where 4. 8-5. 5v input is also acceptable. The 20 MHz clock rate was chosen at random (spare clock/crystal I found laying around). Again the clock input is of a bad design because there aren`t any caps off of each side of the crystal but since the circuit is so simple these...
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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