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ATtiny85 based mini weather station

Posted on May 25, 2015 by R-B One comment

This Instructable describes a mini weather station using ATtiny85 and DHT11 sensor. It consists of TX and RX units with a 433MHz RF link to connect them. The TX unit sends temperature and humidity measurements to RF module, which then displays the data on an LCD. In a recent instructable Indigod0g described a mini weather station that works pretty well, using two Arduinos. Maybe not everyone wants to sacrifice 2 Arduinos to get humidity and temperature readings and I commented that it should be possible to do a similar function with two Attiny85’s. I guess talk is easy, so I better put

An open source chocometer to measure blood glucose level using IR light

Posted on May 25, 2015 by R-B 2 comments

marcelclaro’s entry to HAD Prize 2015 is an open source Chocometer that can measure the glucose level in blood by shining an infrared light source. Diabetes mellitus is a global problem, in 2013, 382 million people have diabetes worldwide, most with more than 45 years, and global economic cost in 2014 was estimated to be $612 billion USD.The future projections are not encouraging.All forms of diabetes increase the risk of long-term complications (cardiovascular disease, blindness, chronic kidney desease, etc.), however, the complications of diabetes are far less common and less severe in people who have well-managed blood sugar levels. Today, the diary glucose level

Low cost game console using PIC32

Posted on May 13, 2015 by R-B One comment

Alexander Shabarshin’s XORYA is a low-cost game console using PIC32MX170F256B microcontroller. XORYA extremely low cost game console that consists of just 1 chip (in its base configuration) – DIP28 integrated circuit PIC32MX170F256B (32-bit MIPS core, 256K flash, 64K data memory) with cost below $5 and a few capacitors and resistors. XORYA is connected to NTSC TV through composite video input and it’s running applications created with help of open source XORLib game library ( http://xorlib.org ) specifically developed for this platform. XORYA may produce a number of black and white video modes (with 640×200 maximum resolution) and (potentially) stereo audio with 15734 Hz

Arduino measures heart beat rate from fingertip

Posted on May 6, 2015 by R-B 33 comments

The PIC16F628A based heart rate meter is one of the most popular projects published on Embedded Lab. In this article, I am going to show how to replicate the same project using a simpler platform like Arduino. The Arduino heart rate meter will use Arduino Uno, Easy Pulse Plugin, and 4-digit SPI seven segment LED display module. It computes the heart beat rate by processing the analog pulse signal output from the Easy Pulse Plugin sensor and displays it on the seven segment display module. The heart beat rate is refreshed every ~3 sec.

DIY Soldering Robot

Posted on May 5, 2015 by R-B One comment

The DIY Soldering Robot was an ongoing project of Brian Dorey for a while and now he has just been able to finish it and test it with some real-world soldering. The DIY soldering robot which we have been building in our spare time over the past few months is now working and we have been able to solder some test Raspberry Pi expansion board headers with the machine. Before starting on this robot we looked at the various commercial soldering systems that are available. Wave soldering machines would have been impractical as the connector is on the top side

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