Following from the last post, I have been looking at the Raspberry Pi power supply and powering a USB external hard drive (HDD). I also changed from the 850mA Motorola phone charger to a 2 Amp 12V/5V supply (just connected the 5V) that was left over from a dead DVR. […]
To feed power directly to the Raspberry-Pi board without using the micro-USB connector, I soldered 2 wires directly to the back of the circuit board. The connection leaves the fuse and reverse-polarity protection diode in circuit. A couple of small holes drilled into the side of the case to form […]
I have recently updated the RC LED flasher controller to simplify the flash pattern programming slightly. Originally you needed a LED connected to channel 6 to indicate the pattern count. The small on-board status LED now provides the indication as well as channel 6; which is still useful when the […]
We have just done another test of the lost model tracker transmitter and the new yagi antenna. To make it interesting, a night test; in the dark. Waterproof the tracker transmitter I armed a transmitter using the servo tester, put it in a piece of bubble wrap and into a […]
You may have noticed that I’ve changed the main blog page to display excerpts rather than full posts. This was done mainly to reduce the download size and help speed up the page load time. To view the page with full posts that include pictures and sometimes quite a lot […]
I’ve been experimenting with some page layout and updated the Fire Denyer information page – HERE. Information or Clutter I find it a challenge to balance between readable/informative and cluttered/confusing. Too much information and the page looks complex and off-putting. Too little information and it doesn’t do justice to the […]
I’ve finished the testing of the yagi and it has worked out well. I started off with the elements just stuck onto the boom at the calculated positions and it worked reasonably well; more directional but the gain was noticeably down compared with another antenna. So I set up the […]
I’ve been working on a new tracking antenna design that can be shipped in a disassembled form and easily reassembled. It can be supplied as a set of elements that simply screw onto a wooden boom of about 20×20 mm by 800 mm long. I’ve done some preliminary testing and […]