Fire activated alarm
Posted on Apr 2, 2012
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 circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in...
In this small switching power supply, a Schmitt trigger oscillator is used to drive a switching...
A Coil Coupled Operation Metal Detector made from readily obtainable components and using an...
his circuit will allow you to connect any tape recorder that has a mic and remote input to a...
The human speech apprehend a small area of frequencies, that is extended from 300HZ until 3KHZ....
This type of charger couples RF from L2 to an external pickup coil. The pickup coil connects to...
Sometimes you want everything in the program to stop while a given condition is true. You can do...
A development board for practicing 8051 microcontrollers. The development board is simple one...
The LTC4251/LTC4251-1/LTC4251-2 negative voltage Hot Swap controllers allow a board to be safely...
The frequency of a crystal-controlled oscillator is held constant to a high degree of accuracy by...
If you`ve ever wanted a high-voltage generator to create neat lightning effects, perform Kirlian...
This white-LED driver circuit is ideal for use in a garden light. It automatically turns the LED...
The magnetometer was moved to an outdoor location and a specialized enclosure was built. An...
1500A-7V-phase thyristor power regulator circuit a plating It consists of the main circuit,...
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