Color sensor amplifier circuit
Posted on Mar 28, 2007
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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..... -
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to....
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This circuit was submitted by Adam from Canada who is still at school. I have provided the text....
This circuit is an ETHERNET controller I use the PIC18F452 and the mikroC C Compiler. I use also...
On the initial part of the positive half cycle, the voltage is changing rapidly from zero causing...
This circuit enables transistorized items such as radio, cassettes, and other electrical devices...
The trip point is set half way between the supplies by Rl and R2; R3 provides over 200 mV of...
By vocalizing the numbers and symbols of its~eypad, the phone provides an audible confirmation...
For the receiver circuit and display modulewill receive the high frequency AC power cordand...
Unlike lead acid batteries one good thing about the Li-Ion batteries is that they can be charged...
DTMF dual tone multifrequency The signal is a commonly used signalling in the telephone network,...
A voltage ranging from 6 V to 15 V is supplied if only one LED per module is used. The increase...
A small 325mW amplifier with a voltage gain of 200 that can be used as a bench amplifier, signal...
This is also remote controlled land rover but as a remote control one can use his cell phone....
The voltage rating on the 470 µF capacitor is not critical, so long as it generously exceeds the...
With DC control voltage of 5 mV to 5 V, circuit controls frequency of both square and triangle...
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