RF Modem Robotics Project using PIC16F84 microcontroller

RF is just way too cool not to use in your designs. But if you're a newbie like me it is difficult to successfully build solid RF transmitters and receivers. When I started out I didn't realize that the larger breadboard I was working off of was causing a lot of the signal deviance because the metal traces on the breadboard worked like small capacitors and changed my circuit dynamics. So after much research ...

Read more

The Weeder Frequency Counter using PIC16F84

This is a port by Peter Cousens to the PIC 16F84 of the  50Mhz Frequency counter kit {originally available} from Weeder Technologies . Since it uses a base PIC that is easily programmable, and provides a usefull bit of bench test equipment at very low cost, it makes an ideal PIC learning project. If you don't want to spend the time on the PCB, collecting the parts or even not programming the uP, you can ord ...

Read more

Using PicBasic with the PIC16F84 PIC Microcontroller

This article shows how to use the PIC16F84 microcontroller with PicBasic to design a quick & effective, serially controlled, I/O-Expander.  Using PicBasic makes developing handy single-chip devices like this extremely simple. If you're spending all your time programming in assembler, you'll appreciate how simple PicBasic is to use, and how easily you can create single-chip solutions like this one in mer ...

Read more

Bit-Banging Serial Interfaces for the Low-End and Mid-Range PICMicros using PIC16F84

When I designed the "YAP" for the "YAP" PICMicro programmer presented in "Programming and Customizing the PIC Microcontroller", I felt that the serial interface provided in "execution mode" of the programmer would be very useful for people developing their own software. With this interface, the user could input new values into the PICMicro application or output temporary values to help with debugging. This ...

Read more

IMAR-3 PC-KEYBOARD ADAPTER FOR SPECTRUM using pic16f84

While I was writing some tips to solve problems about Spectrum' keyboard, some guys asked me for the possibility of using a PC-keyboard coupled by adapter. One market solution was launched by 'Sintech', but isn't available the scheme nor the program used by inner microcontroler. This lack of information pushed me to do an innovating project: I would do the design, prototype, programming, debugging, etc. Thi ...

Read more

PIC LICK-1 using PIC16F84 Microcontroller

This module is so simple, I'm surprised it has not been thought of before. You can fit a PIC16F84A or PIC16F628 and it becomes a "buffered PIC chip." Look at the circuit diagram first to see what the module is doing. It's buffering 5 of the input lines with a 1k resistor and buffering 8 output with a driver (actually a sinking) transistor. If you fit a PIC16F628 chip, you can use the RC oscillator inside th ...

Read more

AT Keyboard Interface V1.04 using PIC16F84

Introduction Sometimes you only need a simple and cheap RS232 terminal to get sufficient control over a PC or a RS232 device. There is no need, no space or even no power to place a monitor, a computer case and a keyboard. Maybe there exists also the problem, that the PC or the device is located somewhere else and you want to interact with it over a short distance. The cheapest way to obtain a complete user ...

Read more

Turning on a LED using PIC16F84

This experiment turns on a LED when button A is pressed. The button is connected to the lowest bit of Port A (bit0). When the button is pressed, the line goes HIGH. This is called positive logic. The LED is connected to the lowest bit of Port B (Bit0). Any bit of any port can be an input or output. It is convenient to make port "A" an input and port "B" an output. Port A has 5 lines and port B has 8 lines. ...

Read more

Isolated RS232C for PIC16F84

Another method that helps program development besides a dot LED as the output device is a serial bit. With a serial transmission to a terminal emulator program, developer may then test program running easier than a dot LED. One of my circuit uses PIC16F84 having one bit for sending ascii character with "printf" function. The PIC16F84 provides a very convenient way of connecting serial data to terminal. We m ...

Read more

Miniature Real-Time Controller using PIC16F84

Introduction The F84 MRTC was my second design of a miniature real-time controller. This version uses PIC16F84 running with a low power X-tal 32,768Hz. The scheduler for 6-channel output was saved in EEPROM. No terminal for serial downloading of the scheduler. It's suitable for fixed scheduler job. Two AA size battery provides +3V backup for clock operation when main power has failed. Time setting at 19:00 ...

Read more
Scroll to top