mark_harrington

Mark Harrington

Engineer Audio, PC embedded technology

A brief overview of my experience to date Born In Saudi Arabia 1964 Spent 13 years in South Africa then emigrated to Britain Interests began in electronics from age of six Crystal radio’s etc matriculated at the age of 17 years with the equivalent of 6 O levels I spent my early days working for companies such as GEC South Africa and Aiwa SA where my interests began in electronics I’ve had many varied jobs ranging from working on the Gold mines to motorcycles to ordinary run of the mill work including working in pub’s , clubs , MacDonald’s, Food chains and so forth So experience wide and varied in many different aspects of the world industries On emigrating back to England my career started with companies such as Rediffusion Electronics in background Industrial music systems, moved onto Comet radio vision services, Telefunken Uk in the TV Video , Audio Industry in its hay day That was when electronics was an awful lot of fun , still is only far more advanced and products defiantly more serviceable than they are these days I also spent considerable time in the Mobile Phone Industry during the early days of the launch of this technology and undertook courses’ with Motorola , Panasonic , Nec working with all the latest Hi Tec equipment to component level on all surface mount devices , multilayer boards with some of the most advanced test equipment available at that time I continued and tried many variants of jobs so I’m fully skilled on washing machines Microwave ovens and now PC’s Ive spent time at universities and colleagues and have taken many specialized courses to undertake service both at customer level , field level and bench level Now I write software for embedded devices make My own pcb’s I experiment at home now learn as much as I can and continue to strive to achieve far more results leading to linking embedded devices with RF and the much use internet both using hardware and software I trust you find at least some of the interesting my website The address of which is address is http://www.harrington.force9.co.uk Lots and lots of articles there on the site also all code PCB layouts and some of the –projects that I still work on to this day Even valve radio and amplifiers

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Web Links

Marks WebSite For All interested parties

Quotes

verni verdi victi "I did I saw I overcame "

Latin

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Discussions Comment: TL494 - which component works with lower frequencies?

Score (0)
May 22, 2012

Hu Gunther here is another circuit that I think you might find interesting as well
http://www.bowdenshobbycircuits.info/boost.htm

Mark

www.harrington.force9.co.uk

Discussions Comment: TL494 - which component works with lower frequencies?

Score (0)
May 22, 2012

Hi Gunther

There is also another way of achieving this with D type flip flops and a 555 pwm circuit Im attaching a link for you to see

http://www.sentex.ca/~mec1995/circ/pwm555.html

Hope this helps

Mark

Discussions Comment: TL494 - which component works with lower frequencies?

Score (0)
May 21, 2012

Hi Gunther

The TL494 operates roughly 300Khz to 500khz if you need to progress to the level of 10 hertz and below I would suggest using pic micro or Atmel and write the software yourself using adc conversion to monitor the output voltage / current but If you are going to do this ….. Don’t…

Discussions Comment: Microcontroller

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May 21, 2012

I think you have to really consider what you intend too use the micro for

8088, 8051 assembler is a good start but not quite as easy as you think Pic micro on the other hand ,low end range is a good place to start which will give you a good insight into micro’s in general

Progressing from here…

Discussions Comment: SMD soldering

Score (1)
May 16, 2012

Good question but they do go short circuit now and again very seldom I must admit but like all good things “Cough cough cough “ Bad health you know They do In answer to this mans question though on a more serious note You need a very fine solder tip , magnifying glass , soldering flux and if you…

Discussions Comment: Satellite Antenna re-positioning circuit

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May 15, 2012

Busy teaching myself opengl as we speak although i quite cant make up my mind whether to use java interpretation c++ interpretation or C sharp but yes I am going to is the answer

Take me a few weeks yet to achieve but never the less I am learning this not only from a Android point of view but…

Discussions Comment: Satellite Antenna re-positioning circuit

Score (1)
May 15, 2012

Monitoring signal strength would still be far more advantageous than just magnetic points but as Frank says it is geostationary

In fact this would really be smart with openGL graphics or even 2G graphics front end with a software , mobile or web interface Nice !! I think i might just uhm pop down…

Discussions Comment: Satellite Antenna re-positioning circuit

Score (1)
May 15, 2012

I have another suggestion for you in partial agreement with Frank but instead devise a binary code on a disk and attach to side of dish

Similar to how a printer works using light sensors using opt couplers to count ticks, for degrees elevation also horizontal platform movement Include end of…

Discussions Comment: digital energy meter programming

Score (0)
May 08, 2012

DID You compile the C code
Did you set up the correct enviroment inside MPLABS after doing this you can then view the hex code which is the result of the compile and then look at the assembler

PS you can download a cutdown version for windows from
This is available from
Scource Boost .com…

Discussions Comment: question for project;

Score (0)
April 30, 2012

Or possibly this

http://users.otenet.gr/~athsam/electronic_dice_2.htm

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