Schematic Power Amplifier and Layout

Ultrasonic Equipment circuit using IC CA3140, NE555

10W Audio Amplifier Circuit using TDA2005

The program only needs a simple “infinite gain” circuit to square off the input tones so that they can be read by the serial port. This is achieved using a 741 operational amplifier. The basic circuit of the unit is given below. The RS232 pins are given for a 9-pin serial port. A 25-pin port […]

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