I am going to present you fabulous Electronic project, DEVICE CONTROL USING TIMER. By using this circuit you can turn ON an appliance at a desired time for a specific time interval. You can use this concept to control the operation of a furnace or central air conditioning unit so that it comes on at a desired time. For example, a timer may be
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used to shut off the furnace in the house after 10 P. M turn it back ON at 5 A. M. This arrangement will help to save energy and money. The concepts of appliance timers can also be used in switching house lights on and off at regular intervals, especially the owner is on vacation. This provision should discourage burglars. In fact, when cyclic operation of the timer is desired, the reset control circuit is not needed. As shown in block diagram, the output of the square wave generator is used as a clock (trigger signal) for the divide by N counters. A divide by N counter is a digital IC that produces a single output pulse for every N input pulses, where N is an integer. The integer N is commonly called the modulus of the counter. There are basically two types of divide by N counters fixed and programmable. For example, the 7490 is the fixed modulus type and can be used as a divide by 5 or divide by 10 counter. On the other hand, the 74192 is a programmable counter that can be programmed to divide from 1t0 15. Often to increase the resultant output count, the fixed modulus type counters are connected in series(cascaded). In this arrangement the output of the first counter is the input to the second, output of second is the input to the third and so on using the cascading technique, time delays of hours, days or even weeks can be achieved. The output of the divide by N counters is then applied to a one-shot (monostable)...
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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