Building a true version of Star Trek tricorder has been the target of engineers and hackers alike since Dr. McCoy complained to be asked to work outside his job. But while modern technology has delivered gadgets remarkably in function, we still have a long way to go before we replicate the 24th Starfleet design aesthetically. Fortunately, there is a whole world of dedicated hackers out there who are willing to take the challenge.
[Taste The Code] is such a hacker. He wanted to build a handy gadget that looked like it would be at Picard's Enterprise so he picked up the components to build a handheld heart rate monitor and went looking for a suitable cabinet. The electronics were simple enough to assemble thanks to the high availability and modularity we like in a post-Arduino world, but as you might expect, it's a little harder to put it into a package that sees appropriate sci-fi while still functional. 19659003] Internally, the heart rate monitor uses an Arduino Pro Mini, a small OLED display, and a key pulse sensor that was originally perceived as a Kickstarter in 2011 by "World Famous Electronics". Wiring is very simple: the display is connected to the Arduino via I2C, and the pulse sensor hooks up to a free analog pin. Everything is powered by 3 AA batteries that deliver 4.5 V, so he didn't need a voltage regulator or the extra components required for a rechargeable battery.
When everything was confirmed, worked on a board tray, [Taste The Code] started the process of converting a handheld gyroscopic toy into the heart rate monitor's new home. He held the battery compartment at the bottom, but everything else was removed to fit. One hole was made on the gun grip case so a finger tip could rest on the pulse sensor, and another layer on the side of the OLED screen. This allows the user to keep the device in a natural way while reading. He mentions that the sensor may be a fiddly bid, but generally gives it accurate readings for its purpose.
If you are more interested in the practical aspects of a Star Trek Star Trek I have seen several projects along these lines over the years, including some that were entered into the Hackaday award.