Home Security System with microcontroller
Posted on Jan 1, 2013
New Circuits
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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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This project aimed to develop a wireless system to detect and allow only the authorized persons....
The circuit provides a 10MHz cutoff frequency. Resistor R3 ensures that the input capacitance of...
Both circuits use the GE. SC146B, 200 V, 10 A Triac as load current contacts. These triacs are...
Two important properties of the 8043 are used to advantage in this circuit. The low input bias...
The I2C serial bus is a popular two-wire bus lor small-area networks. I2C Clock and Data lines...
Transistors Ql and Q2, together with resistors Rl through R7, make up the input balancing stage,...
Integrated circuit Ul (an NE602 double-balanced mixer) is a combination oscillator and frequency...
A MOSFET that drives a load. The load has a sense resistor in its current path and its voltage is...
The pulse width of the compact pulse cum frequency modulator can be varied by altering the...
A wireless interface for your next project Got some wire With a coil, a cap and a transistor, you...
This works in a way that the phone line won`t stay busy while the LEDs are connected and when you...
Emitter voltage completely drops to 0V from 42V during the pulse (transistor conducting or...
If you had time to experiment with the ALF type SE circuit you may have discovered some of its...
Chip power later, when the strobe IEB held low, the memory can be transferred to the...
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