Backup Beeper
Posted on Dec 1, 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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In applications where the rejected signal might deviate slightly from the null on the notch...
In this circuit, a square wave is filtered by a high-order low-pass filter so that a -3-dB...
The circuit works by varying the firing angle of the Triac. Resistors R1, R2 and capacitor C2 are...
This circuit is used IC number NE555 set up to stable multi vibrator. It produces a frequency...
The circuit is okay (not ideal for quality but it will work), but there`s one small issue if you...
The simplicity of a traditional die makes it exceptionally difficult to create a fully equivalent...
The automatic door handle alarm circuit gives a audible alarm and glows a LED when somebody...
To this small FM transmitter to change the mic for an audio jack so I can plug it into my mp3...
This is a constant current source using a FET. This is the most simple replacement to series...
This manual is applicable to all integral horsepower DC motor controls of this series from 40...
This circuit operate between 150 to 165 Mhz. The Crystals I use Are The Digi-Key Electronics...
Circuit shown in Figure 3-85. Manual and automatic control through the transfer switch SA. After...
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