This power supply is designed for amateurs, and has been in operation for over 10 years. Its design is very simple and practically immune to RF. It brings together the individual pieces, is the most expensive part of 600VA toroidal transformer, which can be replaced by another with different characteristics, in the case of a voltage between 17 ~ 2
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0V power and right for our needs. Reference voltage of 7. 5 V Zenner diode (6V8 ~ 8V2), shall apply to Q2, which compares the input resistive voltage divider consisting of R5, R6 and VR2, steering Darlington amplifier Q3, which is responsible for driving the output stage, which consists of a driver in Q4 and 4 2N3771 NPN power transistor, which can be mounted directly on the heat sink without insulation, since it is a collector grounded. The source has a current limit (Q1), adjusted by VR1 and overload LED (DL2) and full protection against short circuits, with zero consumption in case of short circuit can be maintained indefinitely in this state without danger. (Please note that due to the strong power of the power supply with a casual a short length of cable, high or small section that is strong enough to not exceed the maximum current of 40A. Can not be considered a short circuit and cause the supply of a power supply large amounts of energy). active rectifier (D1, D2) is recommended for a type of cathode metal screw is on the ground, install a heat sink large enough block. As power transistors using a hedgehog as high as possible, without being isolated as above, can be part of the window of an aluminum frame. We also recommend using mechanical ventilation with the thermostat.
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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