The circuit shown here is a simple Static 0-9 Display can be used in many applications. The circuit is based on 7490 asynchronous decade counter (IC2), a 7-segment display (D1), and a seven-segment decoder / driver IC 7446 (IC1). The seven-segment display consists of 7 LEDs as `a` to `g`. For different LEDs bias, we can show the digits 0 to 9. Sev
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en Segment Displays are of two types, the common cathode and common anode. Like the type of anode anodes of all seven LEDs are attached, while the type common cathode cathodes are all together. The seven-segment display used here is a type common anode. The resistance R1 to R7 are current limiting resistors. IC 7446 is a decoder / driver IC that is used to control the seven segment display. Work of this circuit is very simple. For each clock pulse output of IC2 BCD (7490) advances a bit. The IC1 (7446) decodes the BCD output for the form of seven segments and controlling the display to indicate the corresponding digit.
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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