Adjustable filter provides lowpass response
Posted on Oct 15, 2012
New Circuits
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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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Our circuit is amplifying the current flowing through your finger (when it touches the touch...
It is a single stage class A MOSFET design with the right gain and a low output impedance. Here...
This circuit is of an 2x 2,500W RMS stereo amplifier, super-light and without switching-mode...
An inexpensive electronic thermometer is capable of measuring temperatures over a range of from...
The electronic gong is comprised of an oscillator (built around half of a 74COON quad 2-input...
After doing a little research I found out that I can change voltage by either using a voltage...
There are many kinds of AVR programmers in market, most of these use the parallel port, a serial...
Often you find yourself in the position of needing to wind your own coil for a project, or maybe...
Here we define 7 levels in thereservoir. The sensed values are connected to an encoder circuit....
The ADM1066 is a configurable supervisory/sequencing device that offers a single-chip solution...
This nifty little circuit lets you record your phone conversations automatically. The device...
The Muntz one-tube design can be considerably improved by adding an audio preamplifier stage....
The congestion of the ether is becoming so great that efforts are continually being made to...
This projects makes it possible to use Sega Saturn peripherals (controllers, mouse) on a PC...
As shown in the circuit diagram of the device is looking for 555 cars, including a transmitter...
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