Monthly Archives: September 2016

LM4752 amplifier

LM4752 is a stereo audio amplifier capable of delivering 11watt per channel of continuous average output power to a 4Ω load, or 7W per channel into 8Ω, using a single supply at 10% THD+N.  A simple mute function can be implemented with the addition of a few external components.

LM4752 circuit

lm4752s amp pic1

lm4752s amp pic2


pictures of my old projects.

Old projects.


Mini tank robot was my one of oldest project. I built it for fun, no use only for fun.  I did used ADXL335 accelerometer for inclination detection , AVR microncontroller (ATmega164P) for processing and controlling  and L293D motor driver Chip and BO series motor.



robot 2


POV display based on ATmega48


lm4752s amp pic1    lm4752s amp pic2






Robot project

master-slave robot arm  or teleoperator, this is one of my oldest project which I was built in 2012, For this simple application I did used NE556 IC to control Servo motors,  It is a dual timer chip and yep brother of very famous chip called NE555,  NE556 dual timer chip, one timer  configured in astable mode and output of it is connected to another timer which is configured in monostable and the pulse width is controlled by simple potentiometer or variable resistor which is connected in monostable circuit(RC network), Monostable output is a control signal further conneted to control terminal of analogue servo motor.

Master_arm (potentiometers as position sensors)  wooden arm

master arm

master arm(potentiometers as position sensors)

Slave_arm with cheap servos

slave arm

slave_arm with servo’s

Control circuit using NE556 dual timer chip and some other passive components

control circuit

master slave robot arm