develop custom applications using Personal Computers for controlling Automation
Systems, both Industrial and Home Automation.
In the industrial
area we have developed software to control concrete and asphalt
batching plants, and systems for controlling a national video switching network. See
below for examples of our applications.
We can develop applications for anything that can be controlled by a PC.
Usually the PC provides the human interface and then takes care of doing
the actual control functions in real time. Sometimes it is desirable to
interface the PC to a PLC, so the PLC takes care of the real world voltages and
Our expertise includes a wealth of experience with serial interfacing and
If you have a piece of equipment that needs to be given additional smarts by being controlled or monitored
externally, then we can help.
The majority of our automation applications involve system design and PC based software
development, however we often also develop custom hardware, including
embedded processor controllers, as required to support our systems. If
what is required cannot be achieved entirely in software or with
off-the-shelf hardware, then we can design special hardware to do the job.
Examples of systems we have developed:
Batch Plant Software
Digital Graphics has designed and written specialised control software
for the Ready Mixed Concrete and Asphalt Industries. The systems
utilise PCs controlling PLCs to control the real time operations of the
batching plants, including weighing of the various materials and
chemicals and the sequenced discharge of the batched materials into the
trucks. The PCs provide the user interface, which is designed to
require the minimum use of the keyboard. The PC also stores the mix
design details for an unlimited numbers of products, and logs batching
information for later analysis.
Video Switching System
The SCATS system, developed for Telstra by Digital Graphics,
controls the real time switching of the video and associated audio
circuits in Telstra's (now defunct) National Analogue Video Network.
SCATS is an acronym for
Switching Control And Tail Switching
The Tail Switching part refers to the control of the circuits between
the Telstra switching centres (TOCs) in each capital city and the
These circuits are called tails and each TV station has a PC connected
to SCATS to provide them with control of their leased tails. The Tail
system is called
(Customer Initiated Tail
The system involved PCs in each capital city with up to 48 serial ports
interfacing to remote video switchers.
Solar Array Control System
innovative system for controlling arrays of parabolic concentrating
solar troughs. The system incorporates small controller boards with
onboard inclinometers on each trough that are networked to a field
control board, which in turn is networked to software running on a
remote PC. The PC is responsible for calculating the optimal tilt angle
for the troughs to follow the sun and monitoring and logging the field.
The PC also interfaces to a PLC that controls other equipment in the
Automated Poultry Weighing System
have recently developed a system for the automatic weighing of
commercial poultry, affectionately known as ChookMon. This project
involved some custom controllers to interface to the scales and to
transmit the data from multiple sheds to a central laptop running a
custom display and logging application. As well as the weights, the
system also monitors temperatures, water consumption and humidity in
Other non automation applications we have done...
Online Image & Document Archive
an online Image and Document Archive that is aimed at Historical
Societies, clubs and such to put their photo and document collections
online. It provides for an unlimited number of images and documents to
be easily retrieved using a powerful search facilty. It incorporates a
link to the Trove system provided by the National Library of Australia.
We can make this inexpensive system available for anyone who needs it.
Read more about IDA
. Click the logo to see it in action.
Point Of Sale System
A simple, customised, web based Point of Sale system designed for use on a tablet or other cheap hardware. This was our first
project. The goal was to design an inexpensive system that was customised to require the absolute minimum number of clicks.
We'd be happy to discuss customising it to your requirements.
Online Membership Database
A highly customised membership database for a voluntary organisation with around 2500 members.
It includes provision for recording volunteer hours and interfaces to a payments gateway for direct online renewals.
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