The buck-boost converter is of value where the output and/or input voltages vary to such an extent that on occasions a buck converter is needed, while on other occasions a boost converter is needed. An example (that will be described further in another project) is that of a battery charger for a number of different battery types, voltages and capa
Click here to download the full size of the above Circuit.
cities and powered by a 12V source. The simplest buck-boost circuit uses a single inductor, MOSFET, catch diode and filter capacitor. This circuit is non-isolating and inverting. Other non-isolating buck-boost circuits include the †uk, which is inverting, and the Sepic, which is non-inverting. These circuits require two inductors which need not be coupled, although coupled inductors can provide much lower output ripple. A disadvantage of these circuits is that they require a coupling capacitor which must be able to support high ripple current. The H-Bridge circuit provides a buck-boost function using a single inductor and without inversion. This is essentially a buck converter followed by a boost circuit. Since the former has its inductor is at the output while the latter has the inductor at the input, they may be replaced by a single inductor. A filter capacitor is not present in the buck part of the circuit. The control of this circuit involves separate control of each section, and as such tends to be somewhat complicated. A number of companies produce controller chips for this type of circuit, including Linear Technology (eg LTC3780, LTM4607). The H-Bridge is so called because the MOSFETs form the sides of an H with the inductor as the crossbar. In this form the buck and boost parts of the circuit are operated in synchronous mode (second diagram below). It is also possible to operate the circuit non-synchronously using...
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.....
characters left: