Atmel ISP 6-Pin Header

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

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

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

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

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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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

Serial Temperature Sensor

May 31st, 2010
   The task was to devise a way to read the temperature from a LM35 Temperature Sensor to a computers serial port for integration with LabView. The hardware used was:
  • LM35 Temperature Sensor
  • Atmel ATMega8L Microcontroller
  • MAX232 Level Shifter
  • PC with Serial Port.
Using this hardware and a breadboard… Read More

ATMega8 Development Board

May 31st, 2010
Sitting in the workshop one afternoon i was playing around with with an Atmel ATMega8L and decided that the breadboard was getting old. This is the results of my frustration. The Task Develop a small PCB that has an ATmega8L, regulated powersupply, Reset Circuit and expansion options. This is the result

ATMega8L Development BoardRead More

Air-stream Ottoway

May 22nd, 2010

Recently a new Air-stream site was constructed at Ottoway.

This site was funded by a new member FireFox at his house. Just like every other install this one had its complications. The install had a few problems with some of the newer equipment not playing well together.

This site was upgraded from a Ubiquiti Bullet2HP to… Read More
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