Nature, Electronics & Robots

This is a simple project, called  LED candle. I will be using yellow LED’s of 2 and a simple PWM code that runs on AVR (ATmega328p) chip make’s the LED flickering that almost looks like candle.  😛  for candle I will be using  LED’s+translucent paper.

circuit:

code is very straight , Simple PWM code runs on ATmega48/328p

#define F_CPU 1000000UL
#include avr/io.h
#include util/delay.h

#include avr/interrupt.h

void timer1_init(void);

void timer1_init()
{
DDRB |= 1<<PINB1; //
DDRB |= 1<<PINB2;

TCCR1A |= 1<<COM1A1 | 1<<WGM11; //
TCCR1A |= 1<<COM1B1;
TCCR1B |= 1<<WGM12 | 1<<WGM13 | 1<<CS10; //
ICR1 = 49; //top value
}

int main(void)
{
timer1_init();

_delay_ms(1000);
while(1)
{
OCR1B = rand() % 47 + 1;

OCR1A = rand() % 47 + 1;

}
}

video:  

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.

Volume indicator Indicates the level of audio signal.(this project is under construction.. will update soon )

INPUT devices: microphone                                                                                                         OUTPUT: LED bar graph                                                                                                               processing: AVR (ATmega32A)

My construction:

microphone pickup’s the audio signal and BC546 preamp amplifies the signal to the level 1.8Vpp max, so that ADC can read.  BC546 collector feedback bias circuit.

audio fed to the ADC pin of ATmega32A

aaded voltage regulator (2sc1383 + 5V6 zener), we can also use LM7805 regulator.

I am always interested in building radio circuits. am transmitter, for construction, I used copper clad boards and really like the construction, not neat though, I do remember that I sprayed thicke…

Source: AM transmitter