Smoke-detector
Posted on Dec 16, 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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When the phone rings, the ring signal from the telephone company lights a neon lamp within a...
This temperature controller operates as a pulse snatching device, which allows it to run at its...
Here`s RF Power Amplifier for QRP with low cost. This circuit is a broadband one from 1. 8 to 30...
C1/C2 operating voltage should be elevated to 25V if you decide to go with a 12V energy source....
This egg timer, which is both simple and functional, shows once again that it is not essential to...
The IC produces all the sound effects, the output at Pin 3 being amplified by the transistor. A...
This project allows one to build a very high quality version of the Stax SRD-7MkII headphone...
This simple circuit generates both white and pin noise. Transistor Q1 is used as a zener diode....
7809 is a voltage regulator integrated circuit(IC) which is widely used in electronic circuits....
This circuit uses a Cmos 4017. The 4017 is a decade counter. The count starts at zero. And it...
The FM radio receiver with PLL designed by A. Zaharov [1] still attracts the attention of radio...
Circuit principle: After turning on the switch SA1,220V transformer transformer, bridge rectifier...
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