You may have been wondering what is firmware; it is the part of the AFM that sits between the software interface and the electronics that control the microscope. This means that we need to take care of two tasks: first, to listen to the interface and translate that into a signal that controls the scanning stage. Secondly, we need to measure the signal from the AFM and send it back to the interface. These tasks are accomplished using an Arduino and a microcontroller that we can program to read & write voltages. To do all these things at the right time and in the right order, we control the behaviour of the Arduino using C++ code, we wrote this over the past two weeks. Continue reading Firmware – Update
It has been a while since the last electronics update when we had first got the focus error signal out. All the circuits now work together and are getting developed.
Yesturday afternoon we took a group trip to the Shenzhen Electonics Market. It is very big, spread out over many floors and a few blocks. With minimal time the group manged a couple of floors in an hour and half!
Drones, power packs, heat detectors, particle detectors and a variety of cables were all purchased. Until next time…!
Capture what you build as your build it. This afternoon we were delighted to welcome Tiffany on skype to talk to us about a new website she designed, named Build in Progress. It lets you share what you are building as you build. Build in Progress is designed to help you document your project as your developing it. We are hoping to show the LEGO2NANO project using this platform. Continue reading Build in Progress
After talking to our “mechanics consultant”, Tom, we decided to redesign the stage and the stage holder so that we could use the dvd head holder that comes with the dvd head. It has some nice features that we could take advantage of, such as a cog system which could be used for coarse movement of the dvd head over the sample, and screw holes that we could fit the precision screws into. This means we don¹t need to have such a complicated design, with the old dvd head and flexure stage abandoned. Continue reading Mechanics – Update Four
Air pollution has become one of the major problem of many cities, affecting billions of people around the globe. Among all the noxious pollutants in air, fine particles with a diameter of 2.5 micrometers or less (Particular Matter(PM) 2.5) are the most harmful for human health because they are small enough to penetrate the lung, leading to premature death from heart and lung disease. PM2.5 particles come from activities that burn fossil fuels, such as traffic, which are abundant in urban areas. Continue reading Measuring Air Pollution