A voltage ranging from 6 V to 15 V is supplied if only one LED per module is used. The increase in the number of LEDs also corresponds to the increase of voltage supply and the connection of additional LEDs should be in series. The maximum allowed voltage is 24 V which could cater approximately 10 LEDs in series connection. A 15 V supply can handle around 7 LEDs while a 12 V supply can handle no more than 5 LEDs. The color and brightness are the factors which the right number of LEDs depend on.
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In using a bulb or incandescent lamp, the supply of voltage can range from 9 V to 24 V. For 24 V supply, four 6 V bulbs can be connected in series. The use of bulbs with more than 400 mA of current consumption would cause the transistor BC337 to be changed with Darlington types like 2N6037 to 2N6039, BD677, BD679, BD681, and other similar types. The number of parts will be reduced if Darlington transistors were used since R1 can be omitted because of the built-in base-emitter resistor. The speed or frequency of the sequencer may be varied with the changing of the value of C1. The LED or lamp sequencer circuit can provide more attraction in advertising as it provides more animation. It was also used in interactive games from an old TV program where you have to press a letter and the sequence of LEDs follow a path up to the main screen which will tell if you pressed the right or wrong letter. It can also be used to provide entertainment for children by placing the circuit in toys such as robots and toy guns.
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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