Archive for the 'Experiments' Category

Better Postcards from Outer Space

Sunday, April 22nd, 2012

Build a copy of this QFH antenna using 3/8 inch wooden dowels and some plastic bits to hold it all together. Capture data while NOAA-19 overhead: Capture data while NOAA-18 overhead: The QFH antenna made a very significant improvement. Sadly, since I have no need of weather satellite images this project is pretty much complete.

Postcard from Outer Space

Sunday, April 15th, 2012

Take one Funcube Dongle. Wire up a ground plane antenna for 137 MHz. Load SDR-RADIO on the laptop. Capture the following as NOAA-15 passes overhead: I think I need a better antenna.

Why the Mendel Parts are Not Finished

Monday, October 11th, 2010

I’ve been working with Johnrpm on the Reprap forum on a DIY, single nozzle, drop on demand, inkjet print head. The print head itself was designed and built by Johnrpm, whereas I’ve been testing it with different nozzles and approaches to making it work reliably as a drop-on-demand device. It is constructed using a piezo […]

Thin Film Experiments, Part II

Sunday, June 21st, 2009

Zinc Oxide-­Based Thin-­Film Transistor Experiments, Episode II is now available for your entertainment. Also, a static page with the current documents and some links to resources for making various types of semiconductors at home has been added. July 1st, 2009: “Zinc Oxide-­Based Thin-­Film Transistor Experiments, Episode II” has been updated to version 0.2.

Liquid Dielectric Zinc Tin Oxide Thin-Film Astable Multivibrator

Sunday, June 7th, 2009

It will take me a while to write up a complete description of the experiment, but suffice it to say that I’ve managed to cobble together a working astable multivibrator using two homemade zinc tin oxide thin-film devices as the active components in the circuit. The circuit worked for about 16 hours before the liquid […]

Thin Film Experiments, Part I(a)

Sunday, May 31st, 2009

I have placed a “show and tell” document in the files section of the yahoo group home_transistor that describes the transistor thin film experiments that I’ve been working on of late. Since it is necessary to join the yahoo group in order to download the document from the group, I’ve attached a copy here as […]

Thin Film Experiments, Part I

Sunday, April 12th, 2009

Google “homemade transistor” and you’ll find very little information concerning the actual making of a transistor from scratch. Making a point contact transistor is certainly doable, and there is some information available on the web on specifically how to approach the problem. However, start talking about any other kind of transistor and about all you’ll […]