The basic idea of TinyProjector is to create the smallest possible character projector that can be either integrated into mobile device, or linked dynamically with wireless RF connections like serial low range transceivers.It used laser diodes salvaged from cheap key chain laser pointers. A micro motor with a single swiveling servo arm, making a continuous full 360-degree rotation, drives the deflection mirror, resulting in a 38-degree left-right sweep. This leads to an unusually high overall laser projection angle of 104 degrees. [via]
TinyProjector - [Link]
This is the complete WLAN solution for AVR and other CPUs.In this page you will be found about equipping an Atmel AVR microcontroller based system with a Prism WLAN interface. The document is intended for people that already have experiences with the AVR microcontrollers and teaches them how to add a cheap but flexible WLAN interface to your AVR projects. [via]
SPI2CF – WLAN for AVR - [Link]
This rain detector will give you a heads-up the instant it starts to rain, hopefully giving you time to close windows and bring in possessions. The battery-powered circuit draws virtually no current when the sensor is dry and the current consumption is low when the buzzer is activated so a couple of AA cells will last a long time. Alternately, a molded power supply with a simple voltage regulator to drop the voltage to 3 volts could be used. The circuit is basically a handy flasher circuit that operates well on only 3 volts using ordinary silicon transistors. When the circuit is triggered, the buzzer is pulsed about once per second. [via]
Rain Detector - [Link]
The Serial Peripheral Interface Bus or SPI (often pronounced “es-pē-ī” [IPA: ɛs pi aɪ] or “spy” [IPA: spaɪ]) bus is a synchronous serial data link standard named by Motorola that operates in full duplex mode. Devices communicate in master/slave mode where the master device initiates the data frame. Multiple slave devices are allowed with individual slave select (chip select) lines. Sometimes SPI is called a “four wire” serial bus, contrasting with three, two, and one wire serial busses.
Serial Peripheral Interface Bus (SPI) - [Link]
Six prototyping boards from Wright Hobbies, a new uCHobby sponsor. This article is a brief review of the new boards. A second comment contest where you can win a set of these boards is also announced.
We announced the Wright Hobbies giveaway sponsorship in this previous article along with a comment contest. There have been a lot of great comments in favor of the sponsorship idea. I have high hopes that sponsorship in exchange for giveaways will be a very successful project and that we will see other sites adopt this idea as well.
Six Prototyping boards from Wright Hobbies – [Link]
As usual this is a serial programmer that works on RS232, powered also from RS232. Schematics and software are provided, the project has been tested and works for sure. Some problems you might encounter involve laptops RS232 ports which supply less voltage and current than the normal desktop computer ports, so if you plug this programmer into a laptop it might not work. [via]
Simple JDM PIC Programmer – [Link]
This circuit is not a PIC programmer, but it can be easily interfaced with one of the many programmers you can find, allowing you not to remove the microcontroller from the board (in-system programming).
Compared to the version 1.1, connection also to LVP programmers is now supported; besides this characteristic, it is of course possible to work both with chips with the LVP bit set (just a switch need to be set) and with the LVP bit not set; it is of course possible to interface the board with traditional programmers (12 V on /MCLR), the most part, I would say. [via]
PIC 16F877 / 16F874 Development Board - [Link]
The Queensland University of Technology in Australia in conjunction with Dyesol has developed an innovative solar cell technology that uses dye-infused, translucent solar cells and can be integrated into windows and uses a technology called “artificial photosynthesis” where a dye similar to chlorophyll absorbs light and generates electricity. Imagine these windows installed onto every skyscraper in the world, they might generate enough power to fuel the whole city below. [via]
Solar cells built into windows could change power sources forever - [Link]
This Pulse Oximeter uses ADuC7024 MicroConverter.Pulse oximetry (PO) is considered to be the “fifth vital sign” of health status.It is a medical device that measures the amount of oxygen in a patient’s arterial blood.A typical oximetry sensor has a pair of light-emitting diodes (LEDs) facing a photodiode through a translucent part of the patient’s body, usually a fingertip or an earlobe. One LED is red, with wavelength of 660 nm; the other is infrared, with a wavelength of 940 nm. The percentage of blood oxygen is calculated based on the absorption rate from each wavelength of light after it passes through the patient’s body. [via]
Pulse Oximeter - [Link]
With an analog-to-digital converter and programming the PalmPilot interface. you can build your own ECG(Electrocardiograph).Here are actually parts that requires :One electrocardiograph circuit built, PalmOS type handheld computing device with serial interface.Four AA batteries (or another way to come up with 6 volts on demand).A DBST (or DBDT) switch, a 1 MOhm potentiometer, and telephone wire + jack.These components are used as a power switch, gain controller, and easy way to connect the electrodes, respectively.One Pontech SV203 robot controller.A box, if you are so inclined. [via]
Homemade ECG - [Link]