About: Ibrar Ayyub

DESCRIPTION In this circuit 16*2 lcd IS used to show the value of count using 8051 microcontroller. The maximum value of count is 99 because. In this circuit we are using 8051-microcontroller, 16*2 lcd, 2 switches for up counting button & down counting button. Data pins of LCD are connected to P1 port of the […]

When you recall to lessons of physics from your basic- or grammar-school, probably you´ve heard a term „black body radiation”. As we know, each object with a given temperature radiates in a wide range of wave lengths, while a maximum of a radiation depends on its temperature. We mention it because the Sun also operates […]

At the fpv-community.de Forum I read about a DIY Weller station designed by Martin Kumm. Basically an Arduino shield to drive a Weller soldering tip. As there is not much to it, the board simply contains an precision OpAmp, a power MOSFET, 2 buttons for adjusting the temperature and a display to show the current […]

Microchip Technology unveiled the RE46C180—the world’s first Ionization Smoke-Detector IC with programmable calibration and programmable feature selection, and the first with horn synchronization and auto alarm locate. This Ionization Smoke-Detector ASIC also has expanded options for implementing hush operation, and more options for interconnect operation—including with carbon-monoxide detectors. These features enable designers to develop and […]

Servo motor driver tutorial. This tutorial uses the 12F675 microcontroller to drive a servo. The microcontroller generates the signals to control a standard servo using Timer 0 interrupts (I used a Futaba servo).  It does not do anything clever just sets the servo position to predefined positions at one second intervals. A Timer 0 interrupt […]

SP335 RS-232/RS-485/RS-422 Transceiver with Internal Termination Features Pin-Selectable Cable Termination No External Resistors Required for RS-485/422 Termination or Biasing Robust ESD Protection: ±15kV IEC 61000-4-2 Air Gap Discharge ± 8kV IEC 61000-4-2 Contact Discharge ±15kV Human Body Model (HBM) 20Mbps RS-485 and 1Mbps RS-232 Data Rates Pin-Selectable 250kbps Slew Limiting Single Supply Operation from +3V […]

Features: Simple to train – Can learn up to 57 commands, and each can be in a different format/protocol Two different operating modes – Keypad or MCU interface Supports up to 32 keys in keypad mode Any key can be a macro (multiple command sequence) key LED indicator output – Indicates training is complete Chip […]

Security is a prime concern in our day-today life. Everyone wants to be as much secure as possible. An access control for doors forms a vital link in a security chain. The microcontroller based digital lock for Doors is an access control system that allows only authorized persons to access a restricted area. An electronic […]

Interfacing an SPI-Interface RTC with a PIC Microcontroller – Maxim Application note describing how to interface an SPI-interface RTC with a PIC microcontroller. . PIC, real time clock, RTC, spi interface, pic microcontroller . -> Using a D Interfacing an SPI-Interface RTC with a PIC Microcontroller – Maxim Application note describing how to interface an […]

Book Introduction: The PIC microcontroller is enormously popular both in the U.S. and abroad. The first edition of this book was a tremendous success because of that. However, in the 4 years that have passed since the book was first published, the electronics hobbyist market has become more sophisticated. Many users of the PIC are […]