Passive Filter Circuits
Posted on Feb 5, 2014
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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 present car controller runs on a single PIC16F870 micro and provides functions for remote...
The circuit is shown in Figure 1, and as described above, uses a voltage doubler rectifier....
The principle of operation is counting the pulse number derived from a constant frequency...
The ground side of the speaker is connected to the junction of two equal high value capacitors...
Some applications, such as driving three-state buffers for data multiplexers or for biphase...
This circuit is a traditional summing amplifier configuration with the addition of the de...
In most digital electronics projects that uses different kinds of switches, switch bounces are...
The following circuit shows about Devantech SRF04 UltraSonic Sensor To The SV203 powered PPRK...
Here`s a Regenerative Receiver project that I designed for the 80 meter Amateur band, but which...
Ne555 is one of the most commonly used timer IC. It is a monolithic timing circuit that can...
A Transistor is an electronic component which enables a small current to control a much larger...
The circuit is light seeking; it will follow a flashlight around a darkened room. A pair of...
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