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23 Nov 2008


Intersil Corporation has announced the ISL29020, a new, high-performance light sensor with digital output. The ISL29020 features outstanding low-light sensitivity (<0.015 lux), wide dynamic range, best-in-class spectral response, and best-in-class IR and UV rejection. The ISL29020 also features a maximum operating current of less than 65 μA. [via]


Light-to-digital sensor output is directly proportional to lux – [Link]


10 Nov 2008

Today i received in my mail box the µUSB-CE5 from 4Dsystems. This is a very nice and slim USB to Serial UART bridge.  Some major features are: it’s cost effective, easy to use, small design and can plug directly on USB port without need any connector.

I needed  this converter to use it with: uOLED-32028-P1T – 2.83″ Active Matrix OLED Module with Touch Screen

The design is based around the FT232RQ from FTDI and provides the user with multi baud rate serial data up to 3M baud rate.  RX and TX signals are both 3.3V and 5V tolerant. Visit product page for more information.

uUSB-CE5: Slim USB to Serial UART Converter – [Link]

10 Nov 2008

The LM2267x/LM22680 Simple Switcher Step-Down Regulator Series is the next generation of highly popular LM267x Simple Switcher Regulators. Numerous enhancements and improvements have been added such as an input range down to 4.5V, tighter output accuracy, adjustable switching frequency, a precision enable, and thermally enhanced green packages.

LM2267x/LM22680 Simple Switcher Series – [Link]

10 Nov 2008

This tube amplifier is constructed uses point-to-point connections and the majority of the parts have been salvaged from old electronics. The amplifier uses 6T9 compactron vacuum tubes in a push-pull output stage. The preamp section uses 12AX7A tubes.

DIY 6T9 Push-Pull Tube Amplifier Project – [Link]

10 Nov 2008

Emilio Ficara writes:

I have done a simple infrared remote control receiver with RS232 ascii output. It can be used for developing remote controls on a PC using the serial port. In practice, the infrared bursts are converted in ascii characters and sent to the RS232 port. The downloadable ZIP file contains the schematic diagram, the printed circuit board, the components disposition and the object file to write into the ATMEL ATtiny2313 microcontroller.

General purpose infrared remote control receiver with RS232 output – [Link]

8 Nov 2008

This Instructables details the construction of a PICAXE-based digital oscilloscope designed to meet most hobbyist’s needs and which can be built for under $100 (the author spent about $70 on his). Cost varies depending on what you might have on hand. [via]

DIY hobby o-scope – [Link]

8 Nov 2008

After a couple of years of prototypes, tests and announcements, finally we have produced an ethernet shield for Arduino. This module gives Arduino the ability to open connections to other Internet hosts or behave like a server, for example a simple web server. We like this design because it uses the w5100 chip from WizNet that implements the whole IP stack in itself providing up to 4 sockets simultaneously. I believe this will provide Arduino enthusiasts around the world with a platfrom that is initially simple to use but with room for growth as the knowledge of the user increases. From the Internet of Things to the Internet of Arduinos, happy tinkering. [via]

New Arduino ethernet shield – [Link]

8 Nov 2008

Sparkfun posted a helpful collection of circuit design tips for avoiding problems at the fabrication house. Very handy for reducing the stress and suspense involved with handing over your designs for production. [via]

Designing a better PCB – [Link]

8 Nov 2008

This is my work in building an Arduino based digital thermostat for controlling my DIY kegerator.

The project is based around the Arduino and uses a LM35 sensor for temperature measurement, a solid state relay for turning on/off the refridgerator, and a serial LCD panel for displaying the temperature inside the fridge and a handy-dandy button to turn the back-light on for reading beer temperature in the dark! WoW!! .

I consider this v1.0 and plan to update this instructable as I add new and fun things that make beer drinking more pleasurable… as if that can really happen! [via]

Digital thermostatic beer refreshment regulator – [Link]

5 Nov 2008

If you have an Arduino project where the dev board is stuck inside a machine, or attached to the rafters or is inaccessible in some other way, a wireless programming/debugging link will save you tons of time. This tutorial is an extension on Rob’s version. In this version, no extra firmware or hardware (other than a capacitor) is necessary. Just use the default bootloader. I demonstrate it with a ‘classic’ Arduino but of course this can be easily adapted to any version or clone.

Wireless Arduino programming using XBee’s – [Link]





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