Variable frequency PWM using MikroC + PIC16F887

When I was doing a project on a robot,I found out that the MikroC PWM library doesn’t support variable frequency values for the PWM frequenc...

Simple 3.3V–5V level shifter

In present day electronic we find many sensors or modules working in 3.3V logic levels.In other terms LVTTL devices (Low-voltage TTL). But e...

PS/2 Keyboard Interface for PIC uC (PIC16F887)

We need to get various kinds of inputs for our microcontroller circuit. If we need to use key board to input data,we can either use simple b...

Step counter for Unipolar stepper motor

In previous post .I told you that I was able to drive an old scavenged unipolar stepper motor from my old printer.As I couldn’t find any dat...

Driving a Unipolar stepper motor using ULN2803 + PIC16F887

Recently I dissembled an old Canon S200SP printer to get some motors. I found a unipolar stepper motor with 5 wires on it. But the model num...

Driving a DC motor using ULN2803 + PIC16F887

As I showed how to drive external load using ULN2803 coupled to PIC16F887 in the previous post ,Here I’m going to drive a small DC motor usi...

Driving external loads using ULN2803 with PIC16F887

Here I’m going to drive external loads such as motors,relays,lamps…etc using a Darlington pair setup.The current can be provided by an I/O p...

Using PIC16F887 I/O to drive external devices

I’ve done a small addition to circuit on the previous circuit .I’m going to use LCD display I added there,to debug my project too.I’m taking...

Simple 16*2 LCD driver with PIC16F887

In good old days,using a LCD display on a DIY project was quite trouble some.But now it has become much cheaper and simpler to use a LCD in ...