Can be directly connected to CD players, tuners and tape recorders. Simply add a 10K Log potentiometer (dual gang for stereo) and a switch to cope with the various sources you need. A correct grounding is very important to eliminate hum and ground loops. Connect in the same point the ground sides of R1, R4, R9, C3 to C8. Connect C11 at output grou
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nd. Then connect separately the input and output grounds at power supply ground. This circuit diagram is quite simple and cheap. Amplifier parts: P1 = 22K Log. Potentiometer (Dual-gang for stereo) R1 = 1K 1/4W Resistor R2 = 4K7 1/4W Resistor R3 = 100R 1/4W Resistor R4 = 4K7 1/4W Resistor R5 = 82K 1/4W Resistor R6 = 10R 1/2W Resistor R7 = R22 4W Resistor (wirewound) R8 =. Simple and cheap mixer circuit. This circuit supplied using 9V power supply. There is high/low-sensitivity switchable inputs for each input channel. Component part list: P1, P2, P3_5K Linear Potentiometers R1, R11, R15_180K 1/4W Resistors R2, R12, R16_2M2 1/4W Resistors R3, R13, R17_750R 1/4W Resistors (See Notes) R4, R14, R18_1K 1/4W Resistors R5_15K 1/4W Resistor R6_220R 1/4W Resistor R7_1K5 1/4W Resistor R8_820R 1/4W Resistor R9_150R 1/4W. Here the circuit diagram of 25 watt high fidelity audio amplifier that build based on single Power Amplifier IC LM1875. Component part list R1 _ 1K R2 _ 1M R3 _ 22K R4 _ 10K R5 _ 180K R6 _ 1R IC1 _ LM1875 C1 _ 1uF 50V C2, 6 _ 100nF C3 _ 22uF 63V. Build based operational amplifier NE5532 and a couple of power transistor TIP41A / TIP42A, this audio amplifier circuit has capability to deliver up to 10W audio power output into 8 ohm speaker. Amplifier Parts list: P1 22K = Log. Potentiometer P2 = 100K Log. Potentiometer R1 = 820R R2, R4, R8 = 4K7 R3 = 500R Trimpot. This is the circuit of dancing LEDs which consists of 10...
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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