Sound operated two-way switch
Posted on Aug 11, 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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The old and omnipresent NE555 can be very good at something it was not meant for: driving relays...
This device provides three channels of 8 bit pulse-width modulation. Output pulse duty cycle...
To calibrate the gauge, connect the battery and press the probes gently into a pot containing a...
This simple receiver AF amplifier can supply several hundred milliwatts to an 8- speaker. The...
Each tub sockets has 2 plastic nibs on the back. For each socket I drilled 2 holes into circuit...
This is a single zone alarm - with automatic exit, entry and siren cut-off timers. It will...
All distances mentioned before can vary, depending on infra-red transmitting and receiving LEDs...
Strictly speaking, this simple circuit shouldn`t work! How could anyone expect an ordinary light...
A lot of electronic circuits in the domain of audio amplifiers are already been published here....
This is a new design of a tutorial board based on the popular PIC16F84A microcontroller. It...
The objective is to make a small light that is activated by motion and will remain on for 20...
This circuit is a missing pulse detector. It is used in the_ General Purpose Controller Board...
Motor starters generally fall into two categories: full-voltage or reduced-voltage. The choice of...
Linear electronic oscillator circuits, which generate a sinusoidal output signal, are composed of...
Current three-phase motor phase protection circuit, as shown in FIG. 3 homemade small current...
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