Power Supply for Preamplifiers (Revision A)
Posted on Nov 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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This circuit is a small digital ?roulette''. It is constituted by oscillator IC1, the counter...
The input stage is comprised of a both halves of a 6SL7 octal dual hi-mu triode in a differential...
The circuit switches the current to an electrical heater on and off to maintain the temperature...
The mercury-in-rubber strain gauge is the detector of breathing. In the model device, the strain...
This Photodiode based Alarm can be used to give a warning alarm when someone passes through a...
Invert a signal to drive fets with hard/fast rise and fall times. I was told in another thread to...
Basically, the circuit consist of two balanced. Simple BFO metal detector. BFO ( beat frequency...
This module is an enhanced version of the D. C. mixer designed for both audio and CV mixing. It...
You can clearly see the three stages found in many audio amps (and op amps today). However,...
This is a handy, easy to build general purpose 50 watt amp. The amp has an input for a radio, TV,...
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