Mohammad

Micromouse is an event where small robot mice solve a 16×16 maze. The maze is made up of a 16 by 16 grid of cells, each 180 mm square with walls 50 mm high. The mice are completely autonomous robots that must find their way from a predetermined starting position to the central area of [...]

I was thinking about designing a Wireless Joypad to control my Robot, and finally came up with an idea to make it out of a cheap Gigaware PS2 Joypad found at Radioshack, which was only $9.99. It has:

2 Joysticks
1 8-way D-Pad (Direction Pad)
8 Action Buttons, and
4 Extra Buttons (Select, Start, Macro, Mode)

So, I [...]

Hi everyone, this is the improved version of my previous Differential Drive Robot. I didn’t think about any name yet; but will figure out one soon. Anyway, this improved prototype has an IR Rangefinder attached to it which can detect distance of any object in front of it within a range [...]

I think, I am running too fast. After building the ATmega motherboard, I didn’t take more than 1 day to build the whole robot. This was just for testing purpose (not even experimental; you can say pre-experimental). At this very moment, I didn’t have any mechanical tool to build up a [...]

Today I have just completed building the brain of my Robot, the MCU Board using ATmega8 AVR Microcontroller. This MCU Board can be powered by 6V Adapter or 5 1.2V NiMH Rechargable Batteries. ATmega8 AVR runs on 5V, and thet’s the reason I used National Semiconductor’s Low Dropout Voltage Regulator LM2940T.

For [...]

This is a simple demo for Analog to Digital Converter. Here I am using National Semiconductor ADC0804, which is a very common 8-bit A/D Converter, compatible with any 8-bit Microprocessor or Microcontroller. In this project I am using a CDS Photocell as an Analog Sensor which is the primary input for the ADC. Based on [...]

The first “Hello World!” project I prefer for Microcontroller is LED Blinking. I have used ATMEL’s 89C51 (40-pins DIP) 8051 architecture microcontroller which is ideal for first time learning MCU Chip. I used my previously made 5V Regulator to supply uninterrupted regulated DC voltage. The program is very simple and straight forward, that [...]

This circuit is a small +5V power supply, which is useful when experimenting with digital electronics. Small inexpensive wall adapter with variable output voltage are available from any electronics shop and supermarket. Those adapters are easily available, but usually their voltage regulation is very poor, which makes them not very usable [...]

This is a simple stepper motor controller which rotates a small wireless camera attached to it. This uses the same circuit of the previous project. The only difference is that the camera moves only if the Right or Left arrow key is pressed from keyboard. In the previous project the stepper motor [...]

This is my first stepper motor project where the I have used NIPPON PF35T-48L4 unipolar motor which I controlled from a PC through the Parallel Port (LPT1, DB25). I simply used a ULN2003A IC which uses 7 Darlington Transistor Array to amplify the input current comming from the port. This 16-pin IC [...]