VHF/UHF Wideband Portable Dipole
Posted on May 16, 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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Useful for liquids level detection and proximity devices Up to 50 cm. range, optional relay...
The circuit uses an ICM7213 precision one minute/one second timebase generator using a 4.1943 MHz...
Power is fed to transformer Tl, a small neon-sign transformer, which steps the voltage up to...
This is schematic diagram of a video amplifier circuit, built based very high speed opamp IC...
It`s a typical AMV (Astable MultiVibrator) setup. The capacitor gets charged through both...
This design was born of frustration with the mic preamp in my Sony R91. It clips at ridiculously...
This simple tone control circuit is designed based on the famous Baxendall tone control...
A preamplifier circuit suitable for high impedance type electric guitar pickups is given here....
This simple robot, which responds to light and avoids obstacles, can be built without using a...
A small bias on the bases of Q1 and Q2 via R1 and R2, assists in "starting" This gives each...
Simple, highly sensitive capacitive ON/OFF switch pads change the state of a latch and turn on an...
You`ll feed the audio from each radio into the ipod audio output, and vice versa. which changes...
The circuit board I purchased didn`t have a working 48v phantom power voltage converter on it....
Power for the circuit is provided by B1, a 9-V battery. Total battery current is 14. 5 mA, so an...
Low-noise preamplifier circuit It shows a typical low-noise preamplifier circuit, an amplifier...
As shown in FIG constituted by 915MHz RF2155 power amplifier application circuit. Radio...
By two NAND gates Di, Dz and resistor Rz, capacitors Cl etc. RC self-excited multivibrator...
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