DIY inline refractometer project from Anfractuosity: The idea of this project is to image the refractometer output, then convert the position of the blue line, to a digital reading, using image processing. The idea is to measure the brix of wort during mash and sparging, so that sparging can be stopped around 1.010 SG, to […]
Isonno posted his Color Meter in the project forum: It’s a digital meter for measuring color; either the reflected color of solid object, or emitted light. It works, but the original goal was to measure/calibrate the output of RGB LEDs driven by PWM, but that didn’t work out so well. Via the forum.
MobileWill shows off his USB Tester in a Sick of Beige (DP5031) case : From the beginning I designed the USB Tester to use the Dangerous Prototype Sick of Beige (SOB) standard PCB sizes. 50x31mm being the smallest rectangle and most ideal for the USB Tester. One of these reasons was that in doing so it […]
SUF posted a cheap frequency counter based on MSP430 in the project log forum. Here is the properties of the project: – Cheap: The component total should be below $5 – Using TI’s MSP430 line of MCUs what I’m learning now – Able to measure till 10MHz – Using LED display – Able to calibrate – […]
Kerry writes: I have just completed a project for accurate milliohm range resistance measurements. The details are on my blog . I’d love to share this with your readers. To effectively measure small resistance values in the milliohm range, we need to accurately measure the current flowing through and at the same time accurately capture […]
Chris Paget presented a talk at Defcon 18 on RFID and the security implications of long range reading of enhanced driver licenses which have embedded 900 MHz RFID tags. The video is divided into four parts totaling about 45 minutes. In addition to part 1 above, here are links to parts 2-4: Part 2 Part […]