About: Ibrar Ayyub

This device acts as interface between your microcontroller project and a GSM phone. It handles all modem data communication between the GSM phone and your micro-project. The best thing is that it decodes PDU into TEXT on the fly! You can easily SMS-enable your any project without need for learning AT commands and parsing complicated […]

Objectives:  To test a level of understanding for my final year project. To present about programmable control home safety via gsm modem; the performance or what have been achieved. To improve myself, in term of knowledge, presentation and communication. Content / Procedure:  Refer to FYP scheme, presentation degree semester 2 to prepare a material. Discuss […]

I needed a good LC meter for my one of my next projects so I went and built the famous LC meter by Phil Rice. This LC meter design is pretty old but since it is a perfectly good device there was no need to design/build/debug one of my own. So, I just changed the […]

Red digits on this photo appear to float in the air in front of the clock. This illusion is based on inertia of a human eye. If LED-formed digits will periodically and frequently enough flash, they will appear solid and steady. And since the matrix of digits is formed by a mechanically scanned single line […]

Far and away my most ambitious project to date, this digital oscilloscope can sample up to four channels at a rate up to 100kHz.  And the best part? It only cost me about $40 in components. The user interface is an application running on a PC.  The user selects the configuration settings here.  When the […]

I can’t take credit for the design of this one.  I bought the gear as a clock a few years ago.  It was mounted on a frame and had one of those cheap clock units running it.  The gear is designed to be driven by the minute-hand shaft of the clock mechanism. The problem was […]

This experiment uses the push-button to increment the count on the 7-segment display. The count-value is stored in a file and this value is incremented by the program each time the push button is pressed. The count-value is used to look-up a table to pick up the display-value for the 7-segment display. Additional experiments on the website […]

#include <16F877.h> #device adc=8 #fuses NOWDT,HS, NOPUT, NOPROTECT, BROWNOUT, NOLVP, NOCPD, NOWRT, NODEBUG #use delay(clock=4000000) #define sw_up pin_a0 // SWITCH UP #define sw_down pin_a1 // SWITCH DOWN INT16 COUNT; int8 A,B,C,D; //int8 segment[10] ={ 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//common anode int8 num[10] ={ 0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x27,0x7F,0x6F};//common cathode 0 1 2 3 4 5 6 7 8 9 // 0 1 2 […]

#include <16F877.h> #fuses XT,NOLVP,NOWDT,NOPROTECT #use delay(clock = 4000000) #use fast_io(A) #use fast_io(B) byte num[5] = {0x00,0x01,0x02,0x04,0x08}; int8 disp,i; void Forward(){ for(i=0; i<=4;i++){ disp =num[i]; output_b(disp); delay_ms(200); } } void Backward(){ for(i=4;i>0;i–){ disp =num[i]; output_b(disp); delay_ms(200); } } void Stop(){ disp =0; output_b(disp); delay_ms(50); } void main(){ setup_adc(adc_off); set_tris_a(0xFF); set_tris_b(0B00000000); stop(); while(true){ if(!input(pin_a0)){ do{ Forward(); } […]

Introduction This is a simple design that interfaces a PIC 16F877 microcontroller to the USB bus using the FTDI FT245 USB FIFO device. It has been designed using a simple single sided PCB with only one surface mount device, the USB chip itself. All schematics, PCB layouts and software are available for download This work […]