Toxic gas detector
Posted on Jul 7, 2012
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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 Multi-Pattern Running light is used to generate several designs of Running Lights....
The darkroom timer/controller uses few external components: a display, a digit driver, keyboard,...
This circuit traps a single positive pulse from a square-wave train. Following the rising edge...
The signal booster, built around a few transistors and support components, offers an RF gain of...
Until Willow Garage was acquired, I was working there as a Web Robotics Engineer. Really, it`s...
The following circuit is the combination of echo chamber circuit that will make the sound...
This is a simple proximity switches with IC 4049th The IC4049 is a bipolar monolithic integrated...
This document has several purposes, and a primary one is to record what I have learned about the...
There is now no need for a separate camera and recorder - for less money you can buy an...
This circuit is used to simulate the police car lights by alternating flashing strobes seen on...
The circuit of Fig. 1 provides an easy yet reliable way to detect the intensity of a. c. (or e....
The compact, low-cost condenser mic audio amplifier described here provides good-quality audio of...
Circuit AD1865 is considered like best 18bit stereo audio DAC ever. I already built another DAC,...
Hens to provide adequate illumination can increase egg production rate, since when asked to...
A photosensitive daytime electricity 1B very small positive value. 555 (4) feet (j reset pin...
Circuit is shown. It consists of a temperature sensor, temperature control of electronic...
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