AUDIO FREQUENCY METER
Posted on Feb 5, 2014
Related Circuits
New Circuits
-
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.....
.
With this circuit we can change the brightness of lamb, with a only key of touch. The key of...
One yet circuit with the known LM3915. It does not differ in a lot of points from other...
Here is a telephone line vigilant circuit to guard against mis- use of your telephone lines. It...
A bridge rectifier and 12-volt regulator powers the MOSFET sensing circuit. The unregulated...
A clamp-on "current probe" such as the Tektronix P6021 is a useful means of displaying current...
The circuit is essentially a constant source modified by the feedback components R2 and R3 to...
The NE602, U1, contains oscillator and mixer stages. The mixer combines the oscillator signal...
An LM311 comparator converts a small analog signal to a digital level for the DC4046...
Let`s examine the statements that describe the equation. In part (1) of the statement, we see...
Based on a National Semiconductor application note, this circuit uses an LM317 3-terminal...
With the wide application of SMT technology in products such as the computer, network...
This circuit, using a minimum amount of parts generates a 10Hz sine wave [based on the component...
The RF amplifier is similar to the one used in the 2. 5MHz amplifier. At a frequency of 10MHz the...
Circuit as shown by the triggering device, monostable delay circuit, the alarm sound generator,...
characters left: