1000:1 Tuning Voltage-Controlled Filter
Posted on Sep 14, 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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Involvement is a modified version of the classic circuit of automatic level control signal used...
This timer can be inserted in a power line to provide a controllable delay before a load is...
Transistors Ql, Q2, and Q3 monitor the two outputs of the stereo amplifier. If the offsets...
Motorola SN54/74LS138 known to be 1-of-8 decoder or demultiplexer which is designed for high...
This circuit is the High Input Voltage regulators, which generate voltage 5V. In these circuit...
The project described in this article is a constant Q, fully expandable graphic equaliser. Where...
The water resource is being turned into a valuable rare resource. So, popularizing the...
All the naturally occurring phenomena like sound, temperature and pressure etc, are analog in...
This electret microphone amplifier is designed using common electronic components. This...
Using measured threshold voltage and Ids-Vds curves, we can then check how well first-order...
J1 And J2 are a matched pair of J310`s (can also use U310`s or a U431 matched pair). R2 is...
The present reference is a special application of current source IC Type LM334. It has a tiny...
A regenerative radio receiver is unsurpassed in comparable simplicity, weak signal reception,...
As shown for the portable hearing aid circuitry, which is the input coupling capacitor C1. C2...
Conventional digital home theater amplifier requires the use of a dedicated integrated circuit,...
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