Various diagram: 20

Showing posts with label 20. Show all posts

Friday, December 12, 2014

Stereo Audio Power Amplifier 20 Watt

Here is a reliably high sound quality audio power amplifier project based on the National Semiconductor’s LM1875 IC.The circuit that we give is a similar form of the application circuit in the datasheet that NS provides. It is really easy to build and low cost.

Wednesday, November 19, 2014

Traffic Light 20 Chanel based on 74LSxx

This view of the proposed traffic Light 20 Chane based only on family and 74LSxx IC 555 as clock source. It is a digital logic circuit. To construct the traffic light rangkaian Control requires no programming of microcontrollers.

This page features a circuit that has twenty open collector outputs that turn on one at a time in a continuous sequence. The circuit make use of the family 74LSxx TTL integrated logic devices. The circuits are designed to drive light emitting diodes or low current and low voltage incandescent lamps, but can also lead to other charges of 80 milliamps.

notes:

The low output go in sequence from 1 - 0 and back to 1 -0
At the clock rate of the 555 timer
c3 = 1uf to 10uf depending on the rate of change desured
R2 (Variable resistor) in use to determine the timer

Monday, October 27, 2014

NCS8353 20 W stereo Class D audio amplifier Diagram Circuit

A very simple stereo Class D audio amplifier electronic circuit project can be designed using the NCS8353 audio IC capable of delivering a continuous power of up to 20 W/ch into an 8 ohms .
NCS8353 stereo Class D audio amplifier circuit is designed by ON Semiconductor and it can be powered from the existing 24 V rail in Flat Panel Television (FPTV) systems. The high efficiency of the NCS8353, 86%, reduces the requirement of an external heat sink when driving high power.

The digital power limit feature can program the output power limit at 10 W, 12 W, 15 W, or 20 W/ch, allowing the NCS8353 to be a single system solution in FPTV audio applications.
The digital power limiter quickly reduces the internal gain of the amplifier when high amplitude signals would cause excessive clipping on the output.
The gain of the NCS8353 is programmed via two gain pins, G0 and G1, allowing four selectable ranges: 20 dB, 26 dB, 32 dB, and 36 dB.
Auto recovery short circuit and over temperature protection circuitry are incorporated to ensure device functionality after short circuit and high temperature events occur .
The circuit can be powered from a wide input voltage range from 8 volt DC up to 26 volt DC .