We went to Frankston today and removed the faulty 1.2GHz and 2.4GHz beacons so that they can be rebuilt
|K100D and Sigma Lens|
|Case Logic SLR Bag|
|M42 to K mount adaptor ring|
|Hardcase with DSLR and lenses|
|A logo from a small PCB
I call this one “Pacman The Small Maze”
And finally to round it all off here is a photo I took of a daisy, It was taken with the sigma lens in macro mode in raw mode. The only post processing was to blur the background a little more, it was already out of focus due to the narrow depth of field when using Macro anyway.
Well I am at it again… I have a thing for torches, well not just torches but tools in general and I see torches as a tool. I have a Led Lenser Police Tech Focus with 115 lumens of light output. This is one of my main torches and I carry it with me most places I go.
Led Lenser Police Tech Focus
Green Maglite solitaire
3D Cell Maglite
I have also bought the following accessories for the red maglite. The first is a tail cap with glass breaking tip for breaking automotive glass. Second is a crenelated strike bezel, I have also got a terralux 700 lumen Cree LED module and a belt loop.
Glass Breaking End Cap
Well I finally took the plunge and got my two sons up on the roof today and we installed my new beam antenna for 70cm or the MHz band. The antenna is a 20 element 18 directors one driven dipole and a reflector. It has a total length of 3.64 meters.
Unlike a television antenna I have mounted this one vertically with the elements running up and down as I am using it on FM in to repeaters with vertical antennas. I had to make up my own gamma match and used a 4:1 match for it made from coax.
I have started to make a bench power supply from an old mini ATX power supply. The supply is really small and does not have room in the case to mount the binding posts for the outlets or the fuse holders for the voltage rails. I am going to mount the supply in to an ABS plastic case but still keep it in its own steel enclosure to restrict RF from the switch-mode.
I will be able to have +12VDC at 20A , -12VDC at 500MA, 5VDC at 30A and 3.3VDC at 18A.
Inline fuses in all the rails will be fitted to protect the supply. I have wired the Soft switch of the supply permanently on as I will have a Hard switch in the Mains AC input so that I don’t use any power while the supply is just sitting there. An ATX supply supplies 5VDC even when it is ‘off’.
I will also be fitting a variable voltage regulator based on an LM317 in to the case from the 12VDC rail to give me variable voltage, this will also have a Voltage meter (analog panel meter).
I have hooked up an 8.2Ohm 10watt resistor across the 5VDC rail to ground to load the switch mode as one of two things will happen if you don’t, first some supplies will fail to power up if not loaded and some will give stray high voltage (ie Mains) out, there is also the in built fan on the supply to load the 12 volt up.
Here is a pic showing the large ceramic 10watt resistor fitted in to the supply.
I have just been on to eBay and am going to order some banana sockets, a panel meter, fuse holders and the ABS case to mount it all in to. I already have some nice little rubber feet to mount to it.
The supply on the test bench the meter on the right is reading the +12VDC rail and I was getting 12.06 volts and the one on the left is the +5VDC rail at is at 5.14 volts.
I will be hard wiring the supply with a mains lead and get rid of the C13/C14 connection normally used on a PC supply.
Here is a little 780x based power supply circuit. It is released as open hardware, the zip file contains BOM, Overlay and Trace file as well as a diy file for use with DIYLC which you can find here http://code.google.com/p/diy-layout-creator/
The trace file in the archive has already been flipped over for laser toner transfer method of PCB manufacture. Have fun and remember this can handle a MAX of 1amp only if you have a heat sink on the regulator.
Here is the link to the files http://rapidshare.com/files/459232217/780xPS.zip