Because it is the 12 bits, the highest rank counter is divided to 1/4096. Because it is, in the highest rank, the signal of 4KHz can be seen in the about 500-millisecond blink. A 7 segment display is manufactured encapsulating 7 LEDs inside a single case. Each LED is given a shape and position which makes it a separate `segment`: lighting teo or m
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ore segment in different patterns, we can read all digits from 0 to 9 on the display. Segmenfs are conventionally identified with letters from A to G. The schematic diagram above shows the correspondence between segment position and the letter. For example, number 2 is obtained lighting segments A, B, G, E, D, whereas number 3 requires segments A, B, C, D, G. If all seven segments are lit then a number 8 is obtained. Despite of its name, practically all modern 7-segment displays contain 8 LEDs! This eitghth segment is required for the decimal point, and it is conventionally labelled "H" or "DP". To reduce pin count from 16 to 9, almost all 7-segment displays connect together one pin from all of the internal LEDs bringing it to a single display pin. In the case of so called "common cathode" displays, all cathodes are connected together and to the common cathode pin, while the anodes are connected to segment pins indifdually. The opposite for "common anode" displays. The TFK214 display we selected for this projects is a common cathode 7-segment display. The catodhes are connected to pin 3, with anodes of segments A, B, C, D, E, F, G, H to the remaining pins. Pin 6 is connected to the common cathode as well; you need to connect only one to the negative supply. You can try to light any segment up as you do with any other LED. 2. You can add more digits by building a second (or third, or fourth, etc. ) circuit and connecting the...
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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