Yagi Uda Antennas
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The computer optimized 9 el. homebrew antenna is performing very well. I have made many long distance contacts using the ON6MU VHF Yagi antenna. I have the antenna located only 35 feet above the ground. (See antenna photo titled KC8VWM to see how high it.... -
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The elements diameter of the antenna may vary between 5...8mm and the dipole diameter may vary between 8...12mm (12mm recommended) without the need of changing anything to the length or spacing. All elements except the dipole are electrically connected to....
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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.....
Transistor Q1 acts as an amplifier for condenser microphone MIC1. The output of Q1 is applied to...
IR remote control is a device you can find everywhere where you can find TV, VCR or home theatre....
This circuit is quickly charging the battery. If you need a faster charger, this circuit is...
The circuit presented here is a very simple and yet highly effective alarm system for protecting...
To convert the MaCom 10GHz "White Box" (or "Whitebox" for the search engines) unit for ham radio...
This is an implementation of the L298 to drive motors and inductive loads up to 4A continuously....
THE L3 WIRE - AMPLIFIER TYPE NH19-6112 P. REWIERSMA NIKHEF-H AMSTERDAM FEBRUARY 1986 Abstract:...
As shown, the power supply terminal to use 1 F chip capacitor filter, and should be as close to...
Because so many AP500A having the above advantages, the use to which the stereo has incomparable...