Keys Finders
Posted on Feb 6, 2014
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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 decision to use either AM, narrowband FM Oess than 15kHz), or wideband FM (greater than 30...
An on-board oscillator and a 17-stage divider compose IC1. By connecting a standard 3.58-MHz,...
This project demonstrates a number of aspects of the PIC16F687 microcontroller, like: ultra low...
A very simple and useful antenna amplifier can be constructed using this circuit diagram. This...
This is a follow up to an earlier post I made here. Below is the relevant portion of the...
The most commonly available headphones have an impedance of 2 × 32 ?, this relatively low...
This is an UHF bandage TV antenna preamplifier circuit With 15dB accretion to body easily. It is...
How often on average do you have to call members of your family each day to tell them that dinner...
This article lists various types of audio amplifier circuits using Mosfet. We have tested all...
This is one of the simplest stereo balance indicator circuit that you can have. The circuit will...
This design is based upon an ECL86 Amp design posted by Yves quite some time ago. This design...
Although not a new device, the LM317 is still a high-performance regulator. Its output voltage is...
This is a simple circuit which outputs a voltage which is more than the input. This could be used...
5 min circuit can continue to operate in the state of the power outage, the role to protect the...
FGDF-3 three-phase low-temperature iron plating main circuit KGDF-3 low-temperature iron plating...
Figure 1-1 The general-purpose timer once timing of 5 minutes to 18 hours; the timing cycle from...
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