Recent Posts

Intelligence and how to improve at chess

Intelligence and how to improve at chess

Everyone who likes chess, wants to play better, but even today it is not quite clear what is the best way to approach chess training. Chess players all over the world start fast with improvement, but eventually settle into a plateau of long gruesome and slow progress. Wouldn’t it be fantastic if there was a […]

Rubik's Cube Timer

Rubik’s Cube Timer

I have been looking for a good timer to use to record my solve times for the Rubik’s cube. There are quite a few and I have used them all for the most part. But I am not totally pleased with any single one of them. Don’t get me wrong there are several, that are […]

Tri-Field Meter Part 2

Tri-Field Meter Part 2

I couldn’t find the old schematic for this project, so here is the very basics of the high gain OP AMP (LM741) and the audio amplifier (LM386): This doesn’t have the fancy stuff like the LED based output or the external audio jack or the low/hi gain switch, but it should get you started. The […]

Mentally compute the day of the week (the perpetual calendar made easy)

Mentally compute the day of the week (the perpetual calendar made easy)

October 29, 2008 is… wednesday! Being able to know the day of the week for any particular date is a handy ability. In our times, a cellphone or computer can answer the question in seconds, but it is more handy to just know. Above all, being able to do it is impressive, which is of […]

Stopping Time (Visually)

Stopping Time (Visually)

UNDER CONSTRUCTION… Recently, Nate True of Cre.ations.net posted a very nice project involving some water, some electronics to provide the illusion of time distortion. (Time fountain) I have been long since interested in high-speed photography. Many years ago I built a very simple device using some aluminium foil, an air rifle, a couple of ligth […]

Bipolar Binaural Galvanic Vestibular Stimulation

Bipolar Binaural Galvanic Vestibular Stimulation

or how I learned to control humans with electricity The effects of Galvanic Vestibular stimulation have been known for quite a while. But it was not until recent years that the phenomenon has picked up quite some interest in the scientific community and the public eye. I read the papers, saw some videos from japanese […]

Tri-Field Meter

Tri-Field Meter

I finished the EMF and the Electric Charge sensors of my tri-field meter. I am still missing the Magnetic Field sensor, but that will have to wait until I have some time to test the Hall Effect sensors and figure out which one is more useful. At this point the meter has extremely good sensitivity […]

Shallow depth-of-field on video (part 2)

Shallow depth-of-field on video (part 2)

Building a 35mm DOF adapter The task of making a usable 35mm DOF adapter is simple yet contrived. The actual crafting offers little challenge, it is the design and the selection of appropriate components that makes it both interesting and complex. After reading all I could find on this topic I realised that this is […]

Shallow depth-of-field on video (part 1)

One of the important visual differences between something shot on video and something shot on film is the different depth-of-field (DOF). So how exactly can we make a camcorder exhibit a shorter DOF?