Beat-Frequency Audio Generator
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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Working on live telephone circuits can be a problem. You just can't connect a normal scope probe...
The circuit provides a 10MHz cutoff frequency. Resistor R3 ensures that the input capacitance of...
For a dark photocell, high resistance, the vohage across the diac rises rapidly with the line...
The CS209 is designed to detect the presence or proximity ofmagnetic metals. It has an internal...
This is a grid dip oscillator (GDO) circuit developed by Luigi Falcone. This circuit uses seven...
The LED meter circuit is simpler and smaller than its analogue counterpart, and is very common in...
We will use them to show current room temperature using a LM35 temperature sensor. Please note...
A solar charger circuit is used to charge lead acid batteries or Ni-Cd with solar power. Circuit...
This module is an enhanced version of the D. C. mixer designed for both audio and CV mixing. It...
The FM Remote Control Receiver` (available on this website in Infra-red circuits section) has a...
The 7MHz CW transceiver made with MC3362P. I made a 7MHz CW transceiver by using the IC for the...
I have an almost mint condition Fisher 800b hi-fi amplifier that I want to convert into a mic...
This is Micro inverter or The inverter very small-sized, perform modify from the energy battery...
I`ve built a 555 based oscillator to drive ir led at 38khz. I`ve got the circuit wired up and...
Sensitive low-current relay coils often operate at much lower voltages than their typical...
Feature of an offered frequency meter that he besides the main function allows to define...
As a photoelectric switch with photoresistor circuit, the sensitivity is very high, as shown for...
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