There are times when I would need to measure relative propagation delay characteristics of digital waveforms my scope. Usually i would resort to the use of manual cursors until I peeked at the measurement delay menu and wondered the meaning of FFR, FRF, FFR among other parameters. More so I did not find any articles … Continue reading Understanding digital delay measurement parameters
Materials Plywood Hand saw G-clamp Sandpaper Printing paper Procedure Obtain a batarang image from the internet and print it on printing paper. Trace the batarang on the plywood. Clamp the plywood on a worktable and cut off the excess wood pieces with a hand saw. File/sandpaper till a fine finish.
As a website maintainer one usually needs to reduce the average image file size on a website in order to save bandwidth. A tool I just started using on linux is pngquant to reduce the size of my site's PNG images prior to upload. This is based on a Nairobi linux users group thread. Pngquant … Continue reading Lossy image color space reduction with pngquant
When probing a digital circuit, it is best to avoid long wires as may they form accidental antennas. I had a run in with this one when I quickly wanted to check a toggling signal on an Intel Edison. I connected it as below: The waveform I expected: But what I got: I then … Continue reading Minimising RF emmisions during circuit probing
FPGAs(Field programmable gate arrays) are chips that can implement digital logic in their fabric and are very useful in in a few use cases where CPUs fall behind such as: implementing custom/rare protocols. Example: You can take an FPGA to interface to a communication bus in a device that has a rare protocol. Building high … Continue reading Impementing a 1 bit equality comparator in an FPGA
The goal of this project is to develop an device that can measure micrometer vibrations of surfaces. By principle it should be able to detect sound vibrations on surfaces, such as a person talking in a room. Spy device anyone?
This was one of my earliest projects as a novice student when I was just getting into the thrill of 3D printing 3 years ago. Courtesy Fablab UON and Voice of America.