Australian Technical Production Services

Introduction

These are a few projects I have worked out over the years and taken the time to write up.
As I have designed Circuit boards for a number of these, I will be making 'short form kits available for sale - at the moment, while this website is in a formative state if you are interested in a kit you will need to email me with what you want - email address is kits at atps dot net.
Since Australia is not a country renowned for cheap electronic components, overseas visitors will more than likely be able to source the bulk of components more cheaply than I can, so the short form kits will include:
Assembly instructions, Printed Circuit board, Any preprogrammed devices such as embedded controllers etc and any more unusual parts (i.e. parts that are not readily available from companies such as Mouser or Digikey).

Project listing

Compact Foldback wedge 06/05/2013

With a sensitivity of 96dB 1W/1M at up to 200W this 32cm wide (just over 1 foot) wedge is small but still delivers plenty of level. Equipped with Tweeter protection for those moments of unexpected feedback....

Data Acquisition module/(Data Logger) 14/12/2008

5 channel 10 Bit Data acquisition module with input Signal processing board.
The Data Acquisition module uses a serial interface so it can be used with either an older computer or a newer one with a USB adaptor

DTMF Decoder/Display 14/12/2008

Displays DTMF signals on an LCD display

EV SX100/300 Speaker cover (PDF Only) 28/11/2011

Even folk with my limited level of sewing skills can make up a set of covers for EV SX100 or SX300 speakers.

Passive crossover with Active tweeter protection 04/08/2011
If you are interested in making your own speakers this Board offers all you need including Tweeter protection.

QSC K10 Speaker cover (PDF Only) 09/09/2011

As with the EV SX100 or SX300 covers, except for QSC K10 powered speakers.

Small desk Power supply 09/01/2013 - Updated 18/02/2015
While the circuitry is nothing new, this is a handy power supply capable of delivering
+/- 15 to 18 Volts at 1.5 Amps and +48V at 500mA - more than enough power for many smaller desks up to 24 channels.
As it uses a voltage multiplier to produce the 48V rail rather than a separate 48V winding this uses a readily available off the shelf Transformer rather than a more expensive custom wound one.

Medium desk Power supply 17/02/2014
This is the Bigger brother of the power supply above
+/- 13 to 18 Volts at 5 Amps and +48V at 1 A - more than enough power for many larger desks up to 48 channels.
Using Switchmode Circuitry for efficency and lower power disspation it uses a readily available off the shelf Transformer rather than a more expensive custom wound one.

Affordable Valve (tube) Guitar Amplifier
--under development, coming soon--
Anyone who has tried building valve Amplifiers in Australia soon finds that parts are not cheap, so my aim with this project is for a 5 Watt SET design using as many readily available parts as practical. I am aiming at under $100 for the amplifier (excluding case, speaker etc) but will be happy if it comes in at less than $150.

Passive Cabinet emulator for the Affordable Valve Guitar Amplifier
--under development, coming soon--
Provides a balanced line output for the Affordable Guitar amplifier with filtering to emulate a Guitar speaker and a dummy load for the amplifier.