This paper describes the design of a low ’cost 90 W flyback switching power supply for a multi ’sync color monitor. In order to minimize the screen interference from the switching noise, the power supply CAN be automatically synchronized at the fixed frequency of the horizontal scanning frequency (15 to 32 kHz) of the color monitor. The line and
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load regulations of the power supply are excellent. Also, a new universal input ’voltage adaptor enables the power supply to operate at two input voltage ranges, 90 ’130 Vac or 180 ’260 Vac. It CAN minimize the ripple current requirement of the input bulk capacitors and the stresses on the power Switch The design demonstrates how to use recently introduced components in a low ’cost power supply. The state ’of ’the ’art perforated emitter epi ’collector bipolar Power Transistor MJE18004 and opto ’isolator MOC8102 are utilized. MC3423P UC3842A (for MTP4N90) UC3843A (for MJE18004 MC3423P TL431CLP MOC8102 MTP4N90 MCR102 MAC229A8 MJE18004 2N3906 1N4001 1N5819 1N5398 MUR140 MUR180 MBR160 1N4735A 6. 2 V 1N4740A 10 V (for MJE18004 1N4747A 20 V (for MTP4N90) 1N5953A 150 V (optional) 1N5956A 200 V
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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