All posts on March, 2008
Posted on 28 Mar 2008
This is a high resolution flux gate magnetometer based on the FGM-3h sensor.It is used to measuring variations in earth’s magnetic field.This project FGM-3h-sensor manufactured by Speake & Co. This sensor is a very sensitive flux gate magnetometer capable of a resolution in the nT range.it is so sensitive that it can not be used in north-south direction since the magnetic field of the earth is too strong in this direction.[more]
Posted on 27 Mar 2008
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.[more]
Posted on 27 Mar 2008
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.[more]
Posted on 24 Mar 2008
This is a simple microwattmeter. Input range -75 dBm to + 5 dBm. Frequency range 2 to 50 MHz. Level resolution is 0.1 dBm, frequency resolution is 10 kHz. Log-output about 0.5 - 3.5 Volt. Output for external counter. The meter uses a AD606 as log-converter, a MAX186 as ADC, a PIC16C84 as controller and a HD44780 type LCD. The PIC measures frequency and level of the input signal and calculates level in dBm using frequency-dependant factors.[more]
Posted on 23 Mar 2008
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.[more]
