This the season for good cheer, and what can be more cheerful than a project that’s as much fun to use as it is to build? How about a homebrew alcohol breath tester? Daniel Andrade shows how to build just such a device using just an Arduino, MQ3 alcohol sensor and a handful of resistors […]
Category Archives: measurement
RFID Arduino punchclock
If your kids are RFID enabled, here’s a project to give you peace of mind: the Kid-e-log by tronixstuff. Using an Arduino, EEPROM, RFID reader, real time clock chip and LCD readout you can keep electronic tabs on the kids by having them clock in and out of the house with RFID cards. A comprehensive […]
Codebox: save Arduino sensor data to Google
Many are familiar with how to read data from Arduino into Processing. One such example varies the a PC’s onscreen graphics relative to the intensity of light on an LDR. Here MAKE presents a project which web enables Arduino sensor projects, allowing Processing data to be communicated and stored in a Google spreadsheet doc.
AVR based power usage monitor
Dan Stahlke built an open source homebrew power usage meter based on the Atmega168. The project stores the measurements on an SD card. Just might be the ticket for monitoring holiday display power usage. Via Electronics-lab.
Homemade TSA type body scanner
Geek guru Jeri Ellsworth is at it again, continuing with her exploration of homebrew radar devices. In this installment satellite dish hardware is interfaced with an FPGA to provide Via Hack A Day.
System and method for intrabody communications
Here’s a thought provoking patent abstract, a “System and Method for Intra-body Communication,” US patent application number 20100305437 Among other concepts it refers to using the unique audio frequencies produced by teeth clicks as a means of communicating through the musculoskeletal system with a wireless wristwatch device!
PIC based digital LC meter
Sometimes we need to measure inductance and capacitance, but why buy a tool when you can build it? Phil Rice designed this LC meter with a PIC16F628, 16×1 LCD display, and some passive components. You might be able to build this with components you already have.