Four-decade variable oscillator
Posted on Jul 27, 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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If two of these circuits are made in the same enclosure for stereo, then there can be a single...
This receiver weighs about 6 g, used in 41 and 72 MHz, met a great success with readers of the...
A negative pulse at the input is fed via capacitor Cl to the input pin (2) of the IC, Pin 2 is...
This circuit uses one of the LM389 transistors.to gate the power amplifier on and off by applying...
This converter delivers up to 50 mA from a 6-V battery with 78% efficiency. This flyback...
The schematic diagram come from circuit: Battery Charger / Power Supply 14V / 4A with MOSFET...
This document describes a basic circuit that can be used to power high impedance, high voltage,...
The ignition process in any vehicle becomes the heart of the entire system as without this stage...
The Ping) is an ultrasonic range finder from Parallax. It detects the distance of the closest...
Although this design is reproduced directly from the manufacturer`s datasheets, its use in this...
The above table is useful to determine the capabilities of the MOSFETs for the various versions....
The unique circuit design, technology and reasonable structure, all-discrete components, Class A...
By the PI.] P-type transistor VT2, VT3 and other components common emitter-coupled trigger (ie,...
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