ATMEL At-mega_16 Board And Their Circuits/IC’s/Pins Description.

Hi! Welcome back.

Hopefully the first code worked out successfully.

Today Talking regarding the ATMEL Atmega_16 board . There are small circuits/IC’s/Pins that we need to discuss about.

    1.     KA7805A voltage regulator :

·         As mentioned it’s a voltage converter which is placed just after the input voltage is applied on the board. Just check here.

·         Output Current up to 1A.

·         Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24V.

·         The KA78XX/KA78XXA series of three-terminal positive regulator although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents.

·         IO = 500mA, VI =10V, CI= 0.33ìF, CO=0.1ìF, VO=5.3(max).

·         A capacitor is used in between the input & output of the transformer IC which is used to filter the current to pure DC.

    2.     AVR reset:

·         Every time you write the program you need to reset the flash memory of the Atmega board.

·         Before you could reload the program on to your board press the reset button and then refresh Hidbootflash and write.

·         Circuit function :

It’s very simple! When the switch is on the circuit of the MC gets connected to ground thus the MC get a signal 0 and vice verse.

    3.     16 x 2 LCD display:

·         It’s a 16 pin LCD display device.

·         Contents 16 rows and 2 column.

·         At the back on the LCD we have a big black circle which has the microprocessor within.

·         The last 2 and first 2 pins are VCC ,Gnd (0,1-14,15)

·         The 3^rd pin is the RS (register select), 4th pin is the RW (read/write).and the rest are the data pin.

    4.     L293D/N Motor Driver:

Check the circuit here, for the position of the motor driver.

·         Wide Supply-Voltage Range: 4.5 V to 36 V

·         Output Current 1 A Per Channel (600 mA for L293D)

·         The L293 is designed to provide bidirectional drive currents of up to 1 A at voltages from 4.5 V to 36 V.

·         Both devices are designed to drive inductive loads such as relays, solenoids, dc and bipolar stepping motors, servos, accelerometer, brushless motors etc.

·         The important part of this IC is “All inputs are TTL compatible”.

Will come up with new stuffs .

Thanks a lot.