About: Ibrar Ayyub

USB Interface Board Driver Installation Connecting PIC18F4550 First Time This tutorial will try to explain how to make your interface development board to work for the first time. Without a Demo hex code inside PIC18F4550’s flash memory, it  won’t respond even if we connect the Demo Interface Board Directly to computer. In my previous post […]

This Design Idea mates a precision current source IC with precision difference amp chips to create a programmable current source or sink. The resistor-programmable current source/sink in Figure 1 illustrates the basic topology, taking advantage of tightly matched on-chip resistor ratios instead of relying on absolute tolerances. he IIN current source gives rise to a […]

This PIC16F877 microcontroller tutorial answers the question, ” How to implement a controllable digital clock using PIC16F877 ? ” Using PIC16 simulator (Proteus) you can verify this digital clock code and change it according to your needs. Using three push buttons (As shown in figure below) you can adjust time as you desire. This code […]

How to make Infrared (IR) sensor Object Detection Module Circuit Using IR LED and Photodiode The IR Object Detection sensor module is quiet easy to make. This sensor circuit below is a low cost – low range infrared object detection module that you can easily make at home using IR LED’s. We will use a […]

Cortus, which licenses small 32-bit cores, has upgraded its instruction set and launched two new cores which use the new one. Why upgrade? “Embedded applications have got more complex,” replies Cortus vice-president Roddy Urquhart. The new V2 instruction set is 50% bigger than its V1 predecessor and the instruction memory uses about 20% less power, according […]

The DM320018 PIC32 bluetooth starter kit comes with demonstration code that allows it to communicate with smart devices that are bluetooth enabled. It features the PIC32MX270F256D MCU for central processing and the FLC-BTM805 dual-mode Bluetooth HCI module. The kit also contains Cree high output multi-color LED, three standard single color LEDs for display, five push […]

The PIC16F628A has always been my first choice for microcontroller-based projects. It is simple, inexpensive, and easily available. Due to its compact size (18 pins) it occupies lesser space on the circuit board, and meanwhile, it is powerful enough to serve most of a hobbyist’s needs. It is a very well accepted successor of the […]

Embedded ethernet enables microcontroller based projects to send and receive packets over the network. The board shown on the left is actual size and incorporates all the circuitry needed to enable 10BaseT communications. The board is designed to minimize the pin count needed to interface with microcontrollers. An 8 bit data bus, 4 bit address […]

The Microchip PIC32 is a family of complex and powerful microcontrollers that can be purchased for less than $10 in quantities of one. This microcontroller offers many peripherals useful for mechatronics purposes, such as several channels for analog-to-digital conversion, digital I/O, synchronous and asynchronous serial communication, pulse width modulation, etc. For our purposes, the primary […]

Experimenting with an HF oscillator, I needed to control the varactor diode voltage in precise increments over a 2V-10V range. A buffered potentiometer was the obvious choice, and connecting two pots in series to give coarse/fine control (or using a multiturn pot) would offer improved control over the varactor voltage. However, this approach still didn’t […]