This circuit diagram shows how a 555 timer IC is configured to perform as an astable multivibrator. An astable multivibrator is a timing circuit whose `low` and `high` states are each unstable. As such, the output of an astable multivibrator toggles between `low` and `high` continuously, in result generating a train of pulses. This circuit is ther
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efore conjointly known as a `pulse generator` circuit. In this circuit, capacitor C1 charges through R1 and R2, eventually building up enough voltage to trigger an interior comparator to toggle the output flip-flop. Once toggled, the flip-flop discharges C1 through R2 into pin 7, which is that the discharge pin. When C1`s voltage becomes low enough, another internal comparator is triggered to toggle the output flip-flop. This once more|once more|another time|yet again|all over again} permits C1 to charge up through R1 and R2 and the cycle starts everywhere again. C1`s charge-up time t1 is given by: t1 = zero. 693(R1+R2)C1. C1`s discharge time t2 is given by: t2 = zero. 693(R2)C1. Thus, the overall period of one cycle is t1+t2 = zero. 693 C1(R1+2R2). The frequency f of the output wave is that the reciprocal of this period, and is therefore given by: f = 1. 44/(C1(R1+2R2), wherein f is in Hz if R1 and R2 are in megaohms and C1 is in microfarads.
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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