This topic continues from the more general Passive Tone Control circuit, which begins using only passive filters. This circuit follows the previous design, although the component values are different and in an alternate configuration. An audio tone control combines both a Base control and a treble control in the same circuit. This design combines
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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 [not shown] and the actual tone control. The first part of the circuit, comprising the inverting amplifier, is really nothing more than a buffer. The Operational amplifier is configured as an inverting amplifier, with the input applied to the minus input. However the circuit serves no function in regards to the tone control, unless a buffer is a requirement between the filter and presiding circuit. A 0. 47uF input capacitor [value not shown] is used as a DC block with the value selected to pass audio frequencies. The 5uF capacitor at the output of the Op Amp is also a DC block and is not part of the filter circuit. The passive components with comprise the filter are set up just as the previous circuits are, with a few variations. As noted in the diagram, the top part of the filter functions as the bass control and the bottom part of the filter functions as the treble control. The values used in this design differ from the previous circuit. However the values will always be different from circuit to circuit as the designer selects different upper and lower 3dB points for the filter. As the diagram shows the base portion [ low pass filter ] of the circuit may be adjusted with a 3dB point between 32Hz and 320Hz. While the 3dB of the treble section [ high pass filter ]...
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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