Watch Tick Timer Circuit
Posted on Oct 3, 2012
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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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TDA7000 is an IC for FM portable radios which has a Frequency-Locked-Loop system with an...
With the quickening of the modern rhythm of life, the frequency happening in traffic accident is...
This design fulfills these requirements by means of a variable gain microphone preamplifier built...
This circuit diagram is a UM66 based touch sensitive musical bell. The circuit is built around...
This FM booster that can be used to listen to programmes from distant FM stations clearly. The...
It initializes a particular port for working with keypad. A global variable keypad Port must be...
The inspiration for the project came after attending the HamRadio 2000, Millenium Ham Meet @...
One of the simplest sinewave oscillators is the Wien Bridge Oscillator. Any circuit requires 2...
When connected to popular Stax Class 1 electrostatic headphones, the design shown in the figures...
This circuit can be used for large current after use nickel-cadmium batteries, rechargeable...
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