Here I will show you an audio amplifier circuit that can be used for walkie talkies, low power transmitters, and packet radio receivers. A condenser mic audio amplifier gives good quality audio of 0. 5 watts at 3 volts. Here we are going to make use of BEL 1895 (Bharat Electronics Limited 1895) audio amplifier IC which is also a noise free amplifi
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er IC. We are also using a pre amplifier section here to boost the weak signal from condenser mic. The pre amplified signal is connected to BEL 1895 audio amplifier IC. The preset in the first transistor acts as a gain controller, it can vary the gain of amplifier circuit. PCB layout is also given below. In order to enlarge the audio power, the low level audio output from the preamplifier stage is coupled to the audio power amplifier BEL1895 IC via coupling capacitor C1. Capacitor C3 connects the output to the loudspeaker. R1-C4 arrangement acts as the damping circuit for output oscillations. Capacitor C5 provides the boot strapping function.
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....
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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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