The circuit in the schematic below is an improved piece of generator electronics. This is an unregulated switcher. Its function is to make the instrument as loud as possible while keeping the CPU running as long as possible. It transfers electrical energy from the generator more efficiently than rectifier and ACMultiplier circuits. It is being imp
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roved on this website as a group activity. In this circuit, each of the two phases of the stepper motor gets doubled then summed. This is done so that the smallest body movements can generate sufficient voltage to make a sound, even if it`s very quiet. The difference between very loud sounds and very quiet sounds is usually important in music. It is termed the dynamics of the music. This circuit uses a 551 oscillator. The 551 is low-voltage version of the 555 Timer. It oscillates at about 200KHz and drives the base of a power transistor. The base of the power transistor is gated all-on, or all-off. This ensures that the transistor is operating in its most efficient region. This is typical of power-switching circuits such as regulators and type Damplifiers. In this circuit, a TIP120 transistor switches the generator`s current into the inductor for brief bursts (about 500 ns) and then disconnects the inductor for 4500ns. 500 ns is long enough to establish a magnetic field in the coil. In the 4500ns interval, the magnetic field in the coil induces a current in the wire which charges the capacitor. The voltage in the capacitor is nearly insignificant - when the coil`s current is released, it flows into the capacitor. The only practical current limit arises from the internal impedances of the coil and the capacitor(s). In this circuit, the output capacitance is actually a parallel combination of two capacitors: One electrolytic...
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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