Audio Expander Circuit
Posted on Oct 9, 2012
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.....
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To obtain a 1000:1 Sweep Range, the voltage across external resistors Ra and Rb must decrease to...
You may need also need 10 diodes and different resistors, especially if you are using white LED`s...
The 220-240V AC mains source is stepped down to 9V AC by transformer X1. The transformer output...
This low-power 25 watt power inverter circuit which makes use of only 9 electronic parts. The...
The power supply is just a 7812 voltage regulator followed by an op-amp set to 6V to create a...
As in the original single-ended design, the push-pull MiniBlok II uses the relatively inexpensive...
The resistor in series with the LED in Collector circuit of transistor T1 must be 470 ohm, not...
The different between these two IC`s. A Microcontroller is a specialized form of Microprocessor...
This module can be a necessary addition to the Modular Preamplifier Control Center when more than...
This circuits allows you to use a cheap loudspeaker as a microphone. Sound waves reaching the...
Automatic door control and the market price of finished executing agency generally high, the...
Circuit shown in Figure 3-21. It issued motor startup sound, light signal to start the process...
Combination of source is grounded and the emitter follower The source is grounded and the...
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