Frequency-counter
Posted on Apr 11, 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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You can transform a 7415124 multivibrator into a wideband VCO by replacing it conventional fixed...
Schematic Diagram is a layout of symbols and and connection of every electronic components...
This circuit generates a good 1KHz sinewave using the inverted Wien bridge configuration (C1-R3 &...
The amplifier has exactly the same architecture as TX500 with the difference that TX300 has only...
found out the hard way why the 6v EQ-5 hand controller should not be connected to 12v by...
A multimeter can be used to test the health of a triac. First put the multimeter selector switch...
The voltage range will be 0V to 24V and I don`t expect to use any more than 4A. A micro and LCD...
The circuit that I`ve described is a one-JFET design without much gain. You can significantly...
TLD 5085EJ is a smart LED buck converter with an integrated power switch capable of driving up to...
In some video applications, the signal sources deliver RGB signals and a composite sync signal....
The diagram is useful when replacing components since it shows component locations. It also...
I built two secondary coils: Small coil D25.4/H119 (Diameter=25.4mm and Height=119mm) and Medium...
Circuit 90s common recorder head amplifier circuit, the choice of ultra low noise precision op...
Darkroom time exposure of the second circuit It uses 555 IC A for the timing circuits. KA by the...
Direct measurement of soil content measurement circuit different areas of soil moisture,...
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