Butterworth filter has adjustable group delay
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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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In operation, the TL3019 device will activate, or become low, when a south pole of a magnet comes...
The circuit powers the load via the regulator"s input instead of its output. Because the...
A VOX is a voice-operated switch that is often used as a substitute for the press-to-talk switch...
The circuit has a frequency response that ranges from 100 Hz to 3 MHz; the gain is about 30 dB....
This Car LED Light Sequencer uses a standard 74C164 8 bit shift register as its heart of...
Piezo Disks, Audio Schematics and a Condenser Mic The schematics and diagrams here are provide...
3 Watt stereo amplifier circuit using MAX 7910 IC. The MAX9710 a stereo audio power amplifier IC...
It`s a typical AMV (Astable MultiVibrator) setup. The capacitor gets charged through both...
This is a small circuit insect repellent, mosquitoes and birds, or other methods to produce high...
Both halves of the circuit are identical. Both inputs have a dc path to ground via the input 47k...
This project uses an LM3915 bar-graph IC driving two sets of ten LEDs for a 30dB range. The...
This circuit detects when a window is open (it can also be used with a door), indicates that the...
Matrix keypad consists of a set of buttons similar to an alphanumeric keyboard provided with keys...
The Bachmann Big Hauler locomotive has improved greatly over the last few years in appearance,...
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