About: Ibrar Ayyub

Researchers have developed the technology for a catheter-based device that would provide forward-looking, real-time, three-dimensional imaging from inside the heart, coronary arteries and peripheral blood vessels. With its volumetric imaging, the new device could better guide surgeons working in the heart, and potentially allow more of patients’ clogged arteries to be cleared without major surgery. […]

This project is a 4-phase unipolar stepper motor controller. Description Unipolar 4-Phase Stepper Motor Controller Board will help you control a Stepper Motor or 4 individual Solenoids. This circuit consisting of transistors that serve as current amplifier and also diode to prevent damaging back EMF, circuit uses Darlington transistors to provide high current capacity to […]

Description The MAX15108A high-efficiency, current-mode, synchronous step-down switching regulator with integrated power switches delivers up to 8A of output current. The regulator operates from 2.7V to 5.5V and provides an output voltage from 0.6V up to 95% of the input voltage, making the device ideal for distributed power systems, portable devices, and preregulation applications. The […]

I have designed a PIC18F877A micro controller project to read temperature from an LM35 using ADC, display it on an LCD and transmit it to a serial port. When the program starts, sometimes it shows a startup message – sometimes it doesn’t display anything. Also, the serial port connection is not working. Can anyone help […]

Silence at last – or what to do, if a silent operation of a fan matters to us? Despite features of fans being still more improved, it´s still the fact, that they are usually the biggest noise source in devices. If a given device is intended say for a production hall, where an ambient noise […]

This project is a Real Time Clock based on SD1307 RTC Description RTC Add-On Board offers an easy way to interface a standard I2C RTC IC type DS1307, into your project. Specifications  5 VDC supply sourced through the interfacing Box Header connector. Battery backup for the RTC board available on the PCB Four mounting holes […]

The ultrasonic position system uses ultrasonic transmitters/receivers to triangulate position of the robots used in GE423. Each of three transmitters uses a distinct frequencies: 23 kHz, 31 kHz, and 40 kHz. The 2812 DSP is used to measure signal timing and calculate position based on these values. The design of the electronics, as well as […]

  #include <16F877.h> #device adc=8 #FUSES NOWDT ,XT #use delay(clock=4000000) #use i2c(Master,Fast,sda=PIN_C4,scl=PIN_C3) #INCLUDE “LCD_4BIT.C” #include “I2C_24LCxx.c ” int8 value,setpoint=112; void main(){ setup_adc_ports(NO_ANALOGS); setup_adc(ADC_OFF); setup_psp(PSP_DISABLED); setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1); setup_timer_1(T1_DISABLED); setup_timer_2(T2_DISABLED,0,1); set_tris_c(0B10000000); // 1000 0000 PortC set_tris_d(0B00000000); // 0000 0000 Portd is Output lcd_init(); Write_eeprom_24LCxx(0x01,setpoint); lcd_init(); lcd_ROW_COL(1,0); // defind ddram address for put string lcd_putc(” KCHI_MICRO.PIC”); lcd_ROW_COL(2,0); lcd_putc(“READ EEPROM […]

Include “modedefs.bas” @ Device PIC16F877,XT_OSC,WDT_off,PWRT_off,PROTECT_off ,BOD_Off define adc_bits 8 define osc 4 DEFINE LCD_DREG PORTD DEFINE LCD_DBIT 4 DEFINE LCD_RSREG PORTD DEFINE LCD_RSBIT 1 DEFINE LCD_EREG PORTD DEFINE LCD_EBIT 0 low portD.2 trisa = $ff trisb = $00 TRISD = $00 adcon1 = 7 temperature VAR WORD count_remain VAR BYTE count_per_c VAR BYTE sV var […]

The 12F series of PIC microcontrollers are handy little 8-pin devices designed for small embedded applications that do not require too many I/O resources, and where small size is advantageous. These applications include a wide range of everyday products such as hair dryers, electric toothbrushes, rice cookers, vacuum cleaners, coffee makers, and blenders. Despite their […]