Here’s another Dyson teardown, in my efforts to understand how marketing have got hold of relatively simple technology & managed to charge extortionate amounts of money for it. This is the DC35, the model after the introduction of the brushless digital motor. On this version the mouldings have been changed,
In my shack, 99% of my gear is all 12v powered, which is good for a few reasons: Single Power Supply – This increases efficiency, as I’m only getting the losses of a single supply. Safety – Mains voltages are dangerous, I’m not fond of working on such equipment. Portability
Now the final bits have arrived for the SWR Meter module, I can do the final assembly. Here the SMA connectors are installed on the side of the eBay meter, for forward & reverse power tap. These are simply tee’d off the wiring inside the meter where it connects to
Continue readingArduino SWR Power Meter Final Parts & Calibration
I recently posted about a small analog SWR/Power meter I got from eBay, and figured it needed some improvement. After some web searching I located a project by ON7EQ, an Arduino sketch to read SWR & RF power from any SWR bridge. The Arduino code is on the original author’s
It’s official. I’m now part of the uRadMonitor network, & assisting in some of the current issues with networking some people (including myself) have been having. It seems that the uRadMonitor isn’t sending out technically-valid DHCP requests, here is what Wireshark thinks of the DHCP on my production network hardware
I recently came across a design for an Arduino controlled AD9850 DDS module, created by AD7C, so I figured I would release my Eagle CAD design for the PCB here. It is a mainly single-sided layout, only a few links on the top side are needed so this is easy
OK, a few revisions have been made to the water management PCB, mainly to reduce the possibility of the brushed DC motors in the water pumps from causing the MCU to crash, with the other changes to the I/O connector positioning & finally upgrading the reverse blocking diode to a
Having two separate water tanks on nb Tanya Louise, with individual pumps, meant that monitoring water levels in tanks & keeping them topped up without emptying & having to reprime pumps every time was a hassle. To this end I have designed & built this device, to monitor water usage