Air-Stream Woolsheds Online!

Monday, June 14th, 2010

After two days of slaving woolsheds is now connected to the Air-Stream network. Machspeed, ZadZad2 and Myself spent our time fabricating and modifiying an old windmill tower for use with microwave wireless equipment.

Air-Stream Woolsheds is now connected to Air-Stream Gulfview Heights, which makes it currently the longest link in the Air-Stream… Read More

Basic Switch Mode PSU

Monday, June 7th, 2010
This is a quick little project i have done which i find very useful.

This particular power supply uses the LM2576T-5.0 switch mode regulator to regulate a higher DC voltage down to 5v.

the circuit itself is nothing new and is straight from the manufactures datasheets, The circuit board is my work. The regulator itself is able to… Read More

Atmel ISP 6-Pin Header

Monday, June 7th, 2010
A quick little guide to the Atmel STK500 6pin in circuit programming header which features in most of my Atmel based projects.

This layout is compatible with the STK500 Programming board aswell as many AVRISP programmers.

Things… Read More

Air-Stream Woolsheds

Sunday, June 6th, 2010
Air-Stream Woolsheds is one step closer to connecting to the main network today.   After replacing a faulty pigtail Machspeed and myself were able to successfully complete a stumble with surprising results. We weren't expecting to see much at all but surprisingly we picked up the following:
  • Air-Stream Gawler South
  • Air-Stream Gulfview Heights
  • Air-Stream Hillbank
  • Air-Stream Modbury North
  • … Read More

Atmel Standard Reset Circuitry

Wednesday, June 2nd, 2010
One very common thing to use when embedding a micro controller into to a project especially robotics projects is a reset switch. The ATMega family of micro controllers from Atmel have the luxury of a reset pin. However using this feature can pose problems, especially when used incorrectly.

Whilst working on a previous project i found that the program was resetting at random, i later found this was because the reset circuit was done incorrectly.

The following is the standard reset circuit that Atmel recommend using:

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Programmable Timer

Tuesday, June 1st, 2010
The task was brought forward to create a simple to use and cost effective programmable timer with a LCD character display. From what i had laying around on the desk the following plan was devised:

The design is fairly straight forward, the whole project is based around the ATMega8L microcontroller as this has enough I/O… Read More

Basic Regulated Power Supply

Tuesday, June 1st, 2010
The task often comes up where a project needs a quick simple regulated supply voltage, Most of the time this is from a battery to supply a microcontroller or various other logic circuitry. This is quick little circuit i use when efficiency is not important and up to 1.5A is needed.

This circuit uses the very popular LM7805 voltage regulator, while this is not a new regulator and most designers have used it at some point in time it still proves very useful. The basic circuit that i use is adapted and simplified from the datasheets. The following is the layout used:

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Tuesday, June 1st, 2010
One thing i quite enjoy is demolishing old electronics, sometimes just for fun on the end of the Marx Generator but more often for salvage of parts. Demolition Remains Recently i have been destroying a couple of laser printers and fax machines, i have found that these are really good sources of stepper motors, gears and pullys. Some other things i have salvaged… Read More
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