Control System of Numeration

The Romans devised a system that was a substantial improvement over hash marks, because it used a variety of symbols (or ciphers) to represent increasingly large quantities. The notation for 1 is the capital letter I. The notation for 5 is the capital letter V. Other ciphers possess increasing values: X = 10L = 50C = 100D = 500M = 1000If a cipher is accompanied by another cipher of equal or lesser value to the immediate right...

read more "Control System of Numeration"

Schematic Liquid Crystal Display LCD Introduction

3 LCD OverviewThe HD44780 dot-matrix liquid crystal display controller and driver LSI displays alphanumeric characters and symbols. It can be configured to drive a dot-matrix liquid crystal display when interfaced with a processor. A single HD44780 can display up to one 20-character line or two 20-character lines.3.1 Function DescriptionThe...

read more "Schematic Liquid Crystal Display LCD Introduction"

Control Timer Circuit Using Real Time Clock PCF8583

This is a circuit for timer that is control by real time clock PCF8583. The PCF8583 is a clock/calendar circuit based on a 2048-bit static CMOS RAM organized as 256 words by 8 bits. Addresses and data are transferred serially via the two-line bidirectional I2C-bus. This is the figure of the circuit.The built-in word address register is incremented...

read more "Control Timer Circuit Using Real Time Clock PCF8583"

Control Running LED Circuit

This running LED or LED chaser is a good project for beginners in the microcontroller technology. It is easy to build, and the assembler program code can be easily adapted. This running LED light has 15 red 3mm LED's. The 15 outputs of ports B and D are used to drive the LED. This is the figure of the circuit.The LED's light up in a...

read more "Control Running LED Circuit"

Control LCD Display Circuit on The Glass Interface

Liquid Crystal Display on Glass is the newest in LCD technology. The display is very compact, it measures 55x27 mm and the height is only 2mm without LED backlight and 5.8mm with LED backlight. The display's can have different LED background light instead of only the green and blue of the normal LCD modules. There are 5 monochrome colors...

read more "Control LCD Display Circuit on The Glass Interface"

Control Fading Circuit for RGB LED

An RGB LED is a LED which has three LED's integrated in one packaging. These LED's has the colors red, green, and blue. Such a LED costs about 1 Euro. With these three colors you can mix to any color. When using 8-bit PWM a number of 256 * 256 * 256 combinations can be made, thus the LED can show 16.777 million colors, and 256 different brightness....

read more "Control Fading Circuit for RGB LED"

Control Digital Thermometer Using LM35

The LM35 of National Semiconductors that is used in this project is a precision centigrade temperature sensor, which has an analog output voltage. It has a range of -55ºC to +150ºC and a accuracy of ±0.5ºC . The output voltage is 10mV/ºC . The output voltage is converted by the AD convertor of the AT Mega8. The temperature is displayed on...

read more "Control Digital Thermometer Using LM35"

Schematic ALU of 8052 Microcontroller

2.2 ALU of 8052 MicrocontrollerThe ALU performs math functions, comparisons, and decision making. Two SFRs, the accumulator (ACC) and the B register, are the source and destination for most operations. The ALU provides information to the Program Status Word (PSW), which contains a carry bit, an auxiliary carry bit, a parity bit, an overflow bit, register selection bits, and two general use bits.2.3 Accumulator of 8052 MicrocontrollerThe...

read more "Schematic ALU of 8052 Microcontroller"

Schematic 8052 OVERVIEW

8052 OVERVIEW :-The AT89C52 is a low power, high performance CMOS 8-bit microcontroller with 8K bytes of programmable and erasable read only memory (PEPROM). The device is manufactured using ATMEL’s high density nonvolatile memory technology and comparable with the industry slandered MCS-51TM instruction set and pinout.ACC – AccumulatorB – B register for multiply and divide.PSW – program status wordPSW.7 – Carry flag (CY)PSW.6...

read more "Schematic 8052 OVERVIEW"

Control Stepper Motor Driver Circuit Using AT90S2313P

This is a design circuit for drive a motor. Using this circuit, you can drive a unipolar stepper motor. It operates in full step mode. You can get a stepper motor from an old 5.25 disk drive. The AVR attiny2313 micro controller controls the pulses for the stepper motor. This is the figure of the circuit.The pulses are amplified by the ULN2003...

read more "Control Stepper Motor Driver Circuit Using AT90S2313P"

Schematic pulse width measurement Project Description

Project Description:-Our project is to measure the frequency and pulse width of an input rectangular wave form and to implement a digital clock using AT89C52. A signal having rectangular waveform is applied at the pin 12 and 14 of AT89C52. The frequency and pulse width of the signal is measured by the microcontroller and results are displayed on LCD display panel. The project also includes interfacing to personal computer using...

read more "Schematic pulse width measurement Project Description"