The LM1875 delivers 20 watts into a 4 or 8 load on ±25V supplies. Using an 8 load and ±30V supplies, over 30 watts of power may be delivered. The amplifier is designed to operate with a minimum of external components. Device overload protection consists of both internal current limit and thermal shutdown. The LM1875 design takes advanta
Click here to download the full size of the above Circuit.
ge of advanced circuit techniques and processing to achieve extremely low distortion levels even at high output power levels. Other outstanding features include high gain, fast slew rate and a wide power bandwidth, large output voltage swing, high current capability, and a very wide supply range. The amplifier is internally compensated and stable for gains of 10 or greater. Power supply : This power supply is symmetrical, easy assembly, the transformer must be 60VA 18-0-18 volts in the secondary to have a maximum of + 25 volts at the power supply, if you use speakers of 8 ohms can use up to 22 volt transformer and thus will have about 30 watts per channel. B1 is a bridge rectifier that must withstand 100 volts / 4 A, ex: GBU606. The capacitors C2 and C5 can be longer if you prefer, the power supply for the preamplifier circuit is based on the integrated voltage regulators 7815 and 7915, beyond the initial source of the capacitors, there are number of capacitors on supply lines of integrated circuits. Pre-Amplifier: This circuit is based on double operational amplifier NE5532N. The audio is coupled by C26, until the pin 3 of ic5A is amplified and coupled via C25 to IC4 LM1875. In the right channel is the same thing. Stereo Power Amplifier: This circuit is based on two integrated circuit LM1875 audio amplifiers that allow amplification of up to 20 watts per channel or 30 Watts maximum @ 8 ohms @ +-30Volts, are connected to...
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.....
characters left: