Using white LEDs for illuminating our homes is becoming popularnowadays, due to the high power efficiency involved with these devices. The diagram shows a straightforward configuration involving many LEDs, arranged in series and parallel. Refrring to the shown LED tube light circuit using transformer we see the LEDs are driven by a general pur
Click here to download the full size of the above Circuit.
pose 24 V power supply for illuminating the LED bank very brightly. The power supply incorporates standard bridge and capacitor network for the required rectification andfiltrationof the supply voltage to the LEDs. The supply voltage being 24, dividing it by the forward voltage of a white LED which is around 3 volts gives 24/3 = 6, meaning the supplyvoltagewill be able to support at the most 6 LEDs in series. However since we are interested to include many LEDs (132 here), we need to connect many of these series connected strings of LED through parallel connections. Since current limiting becomes an important issue with the white LEDs, a limitingresistoris added in series with each of the strings. The value of the resistor may be optimized by the user foradjustingthe overallilluminationof the LEDtube light. The proposed design will provide enough light forilluminatinga small 10 by 10 room brightly, and willconsumenot more than 0. 02 * 22 = 0. 44 Amps or 0. 44 * 24 = 10. 56 watts of power.
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: