About: Ibrar Ayyub

Overview This is a building block project I developed to try out a few ideas.  It decodes a 4-bit binary word to outputs that will drive a 7-segment LED display.  Functionality is similar to the 7447 BCD-to-seven-segment decoder/driver IC however, because it’s implemented using a microcontroller, the segment control data can be customised to display […]

Overview A four digit decimal counter for the PIC 16F88 with the following features: Count up / down Reset Free running or hold on count over/underflow User count preset Over/underflow output Description This is a 4 digit decimal counter which can operate as a free running counter or in count and hold mode with manual […]

The original DMX512 driver project #800 is now redesigned to incorporate the optional address configuration switch on the main PCB. The no-switches in-band DMX configuration feature is still retained Double sided PCB has resulted in a more compact board size. Firmware has been updated to run a latest generation enhanced midrange PIC16F1823 processor.

Recently I acquired a 5M length of RGB LED strip using SMD5050 RGB LEDs.  It has built in current limit resistors designed for operation from a 12 volt supply.  Having thought this would directly attach to the Picprojects MOSFET RGB LED driver project  I went ahead and bought one only to discover when it arrived […]

Want to build an RGB LED controller that you can program with your own custom sequences and effects? Then read on.  The RGB LED controller has proved to be very popular project and has been the most frequently downloaded code on the site since it was made available.  I’ve been contacted by people who have […]

  PICkit 2 Introduction: There are many PIC programmer available, commercial and DIY devices. As Microchip introduces the new microprocessors the programming software got to be updated accordingly playing catch-up with the PIC manufacturer. That is the root of the problem with third-party PIC programmers. Microchip’s PICkit 2 is the low cost ICSP programmer for […]

Overview This adapter allows you to interface with your car’s OBD-II bus. It provides you a USB interface using the ELM327 command set and supports all major OBD-II standards: SAE J1850 PWM SAE J1850 VPW ISO 9141-2 ISO 14230-4 ISO 15765-4 CAN Hardware The adapter kit schematic is shown here. It is built around NXP LPC1517 […]

Platform: Android (Mobile Devices) – IOS (Apple Mobile Devices) Android (Mobile Devices Snapshots) Descriptions: A complete guide to all of Microchip’s products and development tools with access to datasheets, product details, samples and purchasing of products. This tool also provides access to thousands of Microchip’s application notes and a complete listing of all sales and distribution contacts. Apple […]

Sine Triangle Square Saw Burst Sweep Noise – runs on a PIC16F870 After the recent demise of our multifunction signal generator, we decided to make one of our own.   The circuit uses a PIC16F870 (about $3), an R/2R resistor ladder network (for a real fast and cheap D/A),  and a few other parts. You can […]

After GSM call alarm and GSM SMS alarm as two independent modules, I introduce the Tiny GSM alarm system. The main characteristic of this new version is that this device can operate standalone or as a module for existing alarm system. In previous versions we had only the “enable” pin that armed/disarmed the system. Now, aside from that pin we can arm/disarm the […]