About: Ibrar Ayyub

SD memory cards, especially the ones under 1GB are cheap, relatively easy to interface and provide vast amounts of memory for imbedded control. This device lets you ‘talk’ to sd cards through your serial port. Communication is in ASCII so you just need a terminal program to access it. (Note: the photos shown are of […]

This project is a simple wrist mount digital altimeter which is a device used to determine altitude. This design uses atmospheric pressure to calculate the altitude of its location. The lower the atmospheric pressure, the higher the altitude. The project is comprised of a microcontroller (MCU), an 84×84 pixel graphic LCD and a barometric pressure […]

The 12F675 does not have a built in USART that you can use for a PIC serial port so you have to use a software USART which you can download from this page. Adding a pic serial port connection to the circuit gives you scope for much more interesting projects as you can collect data […]

Crime in general is still on the rise, and having a security alarm installed is no longer a perquisite of the wealthy! Here is a simple and compact security alarm system to protect your home/shop and valuables. The circuit is built around a tiny microcontroller chip PIC12F675. Besides, a ready-made Passive Infrared (PIR) module is […]

Week 01 August 15, 2010 (2 hours): Met as a team after class to finish writing preliminary project proposal. January 17, 2010 (2 hour): Brained stormed the possibilities of developing a multi-touch table. The Multi-touch table would require an external camera as an interface for the Computer Vision Algoithm. I researched that algorithms that fall […]

had a Planar 160×80 EL graphic display that’s been in my parts bin for years that I’ve always wanted to use, and this was perfect. Unfortunately it doesn’t have a controller so I had to interface it to the CPU with an Epson S1D13700 graphic controller. The display indicates speed from a GPS module, air/fuel […]

DMM Piggyback (add RS-232) There are mods that give a multimeter serial connectivity by soldering some pins but, it only works if it already has RS-232 ability. So I decided rather than building a PIC multimeter from scratch, I would Piggyback off a $4 DMM. I used: one PIC16F688 one LM358 a button and a […]

Features Directly Digitize RTDs, Thermocouples, Thermistors, and Diodes Single 2.85V to 5.25V Supply Results Reported in °C or °F 20 Flexible Inputs Allow Interchanging Sensors Automatic Thermocouple Cold Junction Compensation Built-In Standard and User-Programmable Coefficients for Thermocouples, RTDs and Thermistors Configurable 2-, 3-, or 4-Wire RTD Configurations Measures Negative Thermocouple Voltages Automatic Burn Out, Short-Circuit and Fault […]

Badges are amazing things. Better when you make your own. I was about to attend the 1st MakerFest at NID, Ahmedabad and thought of taking something unique to the event. Badge was a great option and suited the maker theme of the event. So, sitting down with a pen and paper i drew what it […]

Since I first released this circuit for a serial PICMicro programmer, I have been getting lots of feedback from people that have been building it as their first PICMicro programmer. It has been really nice to hear comments from people about their experiences building the “El Cheapo” as well as questions and comments calling for […]