Need to amplify the output of the iPod`s headphone jack would not be enough to provide the chip with a large enough signal to respond to, but this was because I had been researching three different chips. The LM3914 is a linearly calibrated device, so its output will change one-per-volt of the input. This could be a problem for low-voltage inputs like my iPod headphone jack - they would need to be amplified.
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The LM3915 is a logarithmically calibrated chip, where the input exponentially alters the LED output. This is much more useful for me, as the top LEDs of the meters will respond well to the loud peaks of my music. The LM3916 is a more technical chip, and less useful for what I want, as it is calibrated by the decibels of the input. I am not so sure how this is calculated or interpreted by the chip, but here is another crude diagram: I have an A* GCSE qualification in Electronics, and I have *just* taken my exams for AS-level Electronics. I have test equipment at home and soldering irons etc. I would like to buy a pre-made kit but if that`s not possible i am able to create my own and test on Circuit Wizard. Depending on the source of the signal, you need to attenuate the signal down to a useable level, then run it through a series of Band Pass Filters, then those Band Pass circuits into a series of power circuits sufficient to drive as many LEDs are you need to get the job done. I was equally confused which is why I posted both frequency oriented links and sound level oriented links. My initial reactions was Frequency oriented, as he says low bass, mid bass, and high bass. But, I wonder if he doesn`t simply mean low level, mid level, and high level signals, implying that this is a VU meter purely to display signal level. So the original poster needs to clear that up. Is he trying to block out the sound spectrum by frequency...
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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