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Monday, June 27, 2011

LC Meter PIC 16F84 - Phil Rice VK3BHR

An inductance / capacitance meter by Phil Rice VK3BHR, Almost as published in Amateur Radio magazine, April 2004.

A Surprisingly Accurate Digital LC Meter

Phil Rice - vk3bhr - Home Page

"The AADE web site gave details of how their design worked and a circuit diagram. This led me to propose a design using their oscillator, but in a slightly different way. Like theirs, mine would measure the free running frequency of an LC oscillator, then successively apply a known capacitance then the unknown inductor (or capacitor)."

LC Meter PIC 16F84

LC-Meter nach VK3BHR mit PIC 16F84

Der hier vorgestellte Nachbau des LC-Meter von VK3BHR, Phil Rice, verwendet einen PIC 16F84 und eine Punktmatrixanzeige. Der Messbereich geht in etwa von 0 bis 10 mH für Induktivitäten und von etwa 0 bis 100 nF für Kapazitäten.

Wednesday, June 22, 2011

Applied Magnetics by Barry Hansen

Barry Hansen enthusiasm for Coilgun Designs has created an EE education portal.

Learning Magnetism and Basic EE

See the RLC Simulator and Inductor Simulator. By building a Gauss Gun which is like a Solenoid, Electromagnetic Relay or 3 phase contacter, you can learn electromechanics. This may be like a sequential solenoid which makes things move.This leads us to the Linear motor.

Applied Magnetics by Barry Hansen

There is also a very interesting learning article. PID in Control Systems in reading a DIY levitator design In Popular Electronics May 1996 - James Cicon.

Why build a coilgun?

It demonstrates many basic concepts of magnetic machines. A coilgun is foremost an example of a solenoid. These appear practically everywhere, from car door locks to doorbells.

(Youngsters Should do Basic Electricity Experiments with the Supervision and Guidance of a Technician, Engineer, Experienced Enthusiast or an Amateur-Radio Operator

My own interest into electricity-magnetism came with a failed Doorbell in my Schooldays, from collecting gramophone and chemistry lab parts i got escalated to the Iron-n-Copper Age - delabs)

Tuesday, June 21, 2011

ABACOM LochMaster - BreadBoard projects

A Schematic design has been made, either from experience coupled with testing out application note blocks together. It could also be trying out an idea from a Magazine. If you have simulation tools, you may want to simulate parts of the design and iron out some flaws.

Now if this design is small or made of tested blocks and maybe verified by a seasoned designer. Then you can move to pilot production of 7 Nos.

If you cannot afford the risk and the cost of iterations. Sometimes making the PCB may delay the design so much, that the "Time to Market" will be too long. Then you lose out to the competition.

So... or Hence or even Thus ... A quick Breadboard or Stripboard testing not only validates your schematic, but improves your design skills by making you more familiar with the components and their behavior. The real world limitations and the non-ideal electrical specifications of passives, semiconductors and chips too. This brings us back to the word Didactic. We should always have both the feet on the Ground.

I wrote this note above inspired by the LochMaster, few years ago.

ABACOM LochMaster - BreadBoard projects

LochMaster 4.0 is a developers tool for BreadBoard projects. It has useful functions for designing, documenting and testing project
boards.

ABACOM Ingenieurgesellschaft - LochMaster

Monday, June 20, 2011

G8NQN - Martin - Keadby North Lincolnshire UK

Amateur Radio Station operated by Maerin Bancroft. The Online Website includes a Technical section with drawings and building instructions for many projects.

G8NQN - Martin - Keadby North Lincolnshire UK

He has links to various sites that cover the RAE exam theory in detail, this section can be used as a reference for those taking the RAE at a training centre.

CI-V Interface Controller

As you can see the circuit is very simple, and uses the Max 233 CPP RS232 interface chip to control the data flow, this interface works very well with programs like Ham Radio Deluxe etc, and I am now using this interface on a daily basis.

G8NQN - Martin - Keadby North Lincolnshire UK

So far I have only built this circuit on a small piece of Veroboard, but that's where all good projects begin, I am not going to waste time going into the construction of this interface due to its simplicity, however if you want any details please email me you can find my email address on QRZ.COM, (or join my forum) link to that on the homepage.