Mohammad

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 uses a [...]

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 for digital circuit experimenter [...]

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 used to rotate [...]

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 is capable to [...]