This topic continues the coverage of audio tone controls. The first entry started with a Passive Tone Control circuit using different RC filter configurations and introduced an active filter. The second entry showed a fully designed 2-Band Active Tone Control circuit, and now this third section covers a 3-Band Active Tone Control circuit. Compone
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nt values are sometimes provided as examples, but the final filter characteristics are left to the designer, although design equations are provided. Alternate configurations are possible for any of the circuit schematics, as these are all just low-pass or high-pass filters [active filters in the case of the Op Amps]. This audio tone control combines adjustments [RC filters] for a Base control a Midrange control and a treble control all in the same circuit. The design combines an operational amplifier, as the active element, with a passive filter section. The design also uses a buffer amplifier between the external input to the circuit and the actual tone control filters. As indicated this circuit contains three individual filters, or one filter with three individual controls, that adjust the low band [Base], mid band [Mid-range] and high bands [Treble] of the audio range. As with the previous active tone control design the first part of the circuit is nothing more than a buffer and its presence does not effect the operation of the filter [tone control]. If the implementation does not require a buffer, than the first TL082 amplifier does not need to be used. That includes the 10k input bias resistor, and the 5uF blocking capacitor. The 1uF capacitor at the output of the Op Amp is also a DC block and is also not part of the filter circuit, but should be used as isolation between the filter and what ever input circuit is...
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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