Electronics

Upgraded the 12v DC Tesla Coil to 24v

November 19, 2010

I upgraded the 12v Tesla coil to run at 24v – performance is now dramatically improved. If I get the OK from Skori I can publish the PCB mask and component list – nearly all the parts came from Mouser and Jameco. Here is Skori’s original Hungarian page translated into English via Google Translate. The […]

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20,000 volt DC power supply from an old TV

November 12, 2010

As a follow up to the recent post about extracting components from an old TV, here is a short clip showing what I made from them : This was shot at 12:30am so apologies if I sound a little bit “out of it”. This is a simple 15Khz pulsed DC driver for a TV flyback […]

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How to extract the goodness from an old TV

November 5, 2010

I was recently looking to put together a high voltage DC power supply, after searching around online for the necessary components I realised that I would be better off trying to extract them from some redundant technology. One quick trip to my second favourite store – Goodwill – and I had all the parts I […]

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Still too much cool stuff in the world

October 24, 2010

As if phone-controlled drones, and pocket sized death-ray lasers weren’t enough… Another impulsive buy from Fry’s: (Got to stop doing that). Initially I thought that this thing was running on electromagnetism, but upon closer inspection it seems not to be true – most of the power consumed by the unit is going to the LEDs. […]

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Looking for 2 coders to help with the ARDrone.Net library

October 22, 2010
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It looks like being a full time Dad is going to seriously impact my ability to get the ARDrone.Net library fully functional. I’m therefore looking for a couple of people to take over working on the codebase. We all get an equal share of the cred. I decided to do it this way rather than […]

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Switching, Regulated, or Transformers? How power supplies work…

October 18, 2010
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I received another message from Dan, this time asking about power supplies: Subject: Frustrated with power converters So, the past month or 2 I’ve been trying to figure out how different types of AC to DC power supplies work, since i have a few audio/video receivers that im trying to install PC fans inside that […]

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Latest UI for AR Drone .Net control library

October 17, 2010

Just a quick update on the latest and greatest revision of the drone control library. I added some instrumentation in an attempt to visualize the data coming back from the drone, some of these make sense, others do not – I’ll be tweaking as I wire up more of the data. A big shout-out to […]

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AR Drone: Microsoft.Net API control, first successful trial

October 16, 2010
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It’s still early days yet, but I just completed my first successful test of a .Net Windows Forms control to control the Parrot AR Drone. I still need to pass in the Window handle of the control itself to use as the video rendering window, but so far it’s looking very promising. The code is […]

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Did this really work? A very unlikely diode…

October 13, 2010
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Way back, during the Second World War, prisoners of war learned how to build radios from whatever they could find. The “classic” way of building a rectifier was to use a pencil lead and a Gillette blue razor blade. By touching the blade with the tip of the pencil a very basic PN junction was […]

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Crystal Radio Antenna Preamplifier – could this be improved?

October 12, 2010
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I’ve been working on adapting one of my failed Tesla coils into a crystal radio set to show the neighborhood kids. I’ve run into the #1 problem everyone faces – not enough antenna to generate a strong signal. I read somewhere that a “proper” AM antenna should be between 100 – 500 ft for good […]

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