Field strength meter 1-150Mhz
Posted on Dec 12, 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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The i2c-tiny-usb project is an open source/open hardware project. The goal of i2c-tiny-usb is to...
The monolithic quad operational amplifier provides an inexpensive way to increase display...
A power MOSFET and a quad exclusive-OR oscillator makes an effective solid-state relay. Figure...
Meter Ml, a +/-50-uA zero-center D`Arsonval meter movement is driven by Ul, a TL081 FET op amp,...
To provide rapid motor speed changes and motor direction reversal, four outputs drive a MOSFET...
The meaning of Frequency Shift Keying (FSK) is transmitting digital data over a signal path (two...
Medical and industrial applications often require galvanic isolation of 2500 V ac or higher for...
found the current in both the loops using Kirchhoff`s Voltage law but then I`m confused on the...
Given favourable radio wave propagation, the shortwave and radio amateur band are chock-a-block...
This circuit is extremely simple, therefore there is less chance of any problems. It can be...
Here is the circuit schematic of a simple audio surveillance system in which the transmitter will...
The circuit described here is eminently suitable to indicate the capacity of a battery. We use a...
Programmer in my "AVR software and technical Library - April 2003" CD-rom and decide to publish...
Generates force field of high-intensity sound inside car, painful enough to discourage thief from...
As shown in FIG grounds PGA202 and comparators, counters constitute automatic range switching...
Circuit of the easy to use cedar LM3sDZ temperature detection heir. Does not show adjusted to...
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