10 LEDS Audio level vumeter
Posted on Jul 5, 2012
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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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The LTC1050 is confi gured as unity gain 2nd order low-pass fi lter which center frequency is...
The Multimeter Clock consists of three multimeters, the first meter displays hours, the second...
This circuit will flash a bright or high-brightness red LED (5000 mcd). Great for fake car alarm...
This is a circui for audio frequency meter. This circuit uses 555 IC as a mono stable multi...
This amplifier comes with high fidelity (Hi-Fi), high sensitivity, low power consumption and low...
This instrument measures inductances from 0. 1 microhenry to 3 millihenries divided into four...
This circuit has been very useful in filling a header tank for a reticulated water supply on a...
A great collection of touch switch circuits. A touch switch is an electronic device that enables...
Ever accidentally left your front door ajar and had a pet escape Here is a smart solution to this...
A car alarm in its simplest form, needs to be nothing but one or more sensors connected to some...
This simple circuit generates narrow pulses at about 700-800Hz frequency. The pulses, containing...
The Subcutaneous Transmitter (A3013) transmits biometric signals from within the body of a live...
The Pulsed Multiple Gas (PMG) laser described in this chapter is very similar in many ways to the...
This part of the I2C interfacing project focuses on building an acceleration sensor, but in the...
Low phase noise voltage controlled oscillator circuit a It shows a typical low phase noise...
Figure 1-122 is a dedicated high-fidelity surround sound processing IC TDA3810 circuit consisting...
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