These projects were designed for eLabtronics previous boards, the elab40 and elab628, which are no longer available. However, these projects can be applied to eLabtronics' latest range of development boards which can be found in the product catalogue. 

The elab40 as a Real Time Clock Keeper

This project has the PIC16F877 MCU interfacing with the Dallas DS1302, a time keeping chip. The DS1302 chip stores the current date and time in registers of seconds, minutes, hours, days, months and years. The interface allows the 16F877 to read the time keeping registers, as well as writing to any of them for changing the time. The files available to download include a test program and a document on interfacing the elab40 with the DS1302 chip.

Click here to download files.

Using the Infrared / Light Detectors on the eRacer

This project contains documents and test programs for the eRacer. In particular, it has information on using the infrared LED and LDR on the eRacer.

Click here to download files.

Delay's Workshop

This project will describe and illustrate the reasons for the insertion of delays in the instruction list for the PIC628. It explains why they are used and how to design delay subroutines that can be tailored for very specific amounts of time. It includes program examples and documentation with exercises.

Click here to download files.

I2C-24LC256 EEPROM Interface

This package provides subroutines that enable a microcontroller to read and write to EEPROM devices using the I2C bus. It includes test programs and documentation.

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Interrupt Clock

This project provides a a real-time clock using an interrupt to count every 1/100 of a second. The included program demonstrates a working timer using a PIC microcontroller as well as demonstrating how to use interrupts, such that the program may be modified for other purposes. Subroutines and documetation are also included.

Click here to download files.

Pulse Width Modulation (PWM)

This package explains what PWM is and how it is generated on the PIC16F628 chip. It includes a PWM subroutine that is used to setup the hardware PWM output on the microchip. The documentation will describe how to change the frequency and duty cycle of the PWM using formulae provided in this document.

Click here to download files.

RS232 Communication

This package provides subroutines for communication with a host computer via the RS232 protocol. It is designed for a 4MHz clock at a baud rate of 9600bps. Documentation and sample programs are included.

Click here to download files.

Water Level Sensor

This project involves modifying the hardware of the standard elab628 board and programming it to operate as a water level sensor. A pair of metal rods placed in a water tank is used as the sensor device and the elab628 outputs the water height to the eight LED's onboard. Documentation and programs are provided.

Click here to download files.

Course Notes: Introduction to the elab628 for first time programmers

These notes introduces the concepts of programming microcontrollers and working with digital units (instead of analog). It also outlines some features of the elab628 board and the possible input and output circuit connections to the 16F628 chip.

Click here to download file.

• For ezCircuit Designer Projects, click here
• For eRacer_16m Projects, click here
• For Seven Segment Display Projects, click here
• For all available downloads, click here