Variable Bandpass Audio Filter Circuit
Posted on Jan 4, 2013
Related Circuits
New Circuits
-
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.....
.
This is a low power voltmeter circuit that can be used with alternative energy systems that run...
This circuit consists of twin-T sine-wave oscillators. Each oscillator has a filter in the...
The circuit operates from a 5-V supply arid has a current consumption of 2 mA. The output is a...
A diagram of an active loudspeaker. The LF353 of, National Semiconductor, is going to split audio...
AC power is supplied via AC Fuse F1 and Power On/Off switch S1 to 6. 3V filament transformer T1....
Control a car toy. The toy car is controlled via a controller that is connected to it via a wire,...
The conception of this project is directed to the study of the environment response due to a...
U1a operates as a low-noise microphone preamp. Its gain is only about 3. 9 because the high...
This version of the Link is for those who really need a good cheap intercom that will work...
The HIP6301V and HIP6302V control microprocessor core voltage regulation by driving up to four...
The compact, low-cost condenser mic audio amplifier described here provides good-quality audio of...
Avoid drilling extra holes and making changes to the chassis and pcbs by all means. This will...
I built one of these with the RS-232 option many decades ago. It a three channel HF receiver (5,...
Driving an LED, we covered the electronic theory of how to use a Power MOSFET to turn the LED On...
Requires that DC power be brought into the instrument, either through special cabling or an...
Today, we share a principle circuit of electronic games. The main circuit in accordance with the...
characters left:
in3elx Jun 2, 2020