Posted Mar 09, 2013 at 10:16 am
This is a mobile phone sniffer circuit that can detect the signals being used in the GSM (Global System for Mobile Communication) band at about 900 MHz. Since the signals are digitally encoded, it can detect only the signal activity, not the speech or the message contents. A headphone is used to hear the detected signals.
Posted Mar 01, 2013 at 1:26 pm
In this project we are building a JDM programmer that can handle PIC12, PIC16 and PIC18 family microcontrollers and some popular 24C family EEPROMs.
Posted Feb 28, 2013 at 12:26 pm
My passion for excellence progressed over the past 40 years to developing sonically superior amplifiers to the highest possible standards, providing life like sound performance.
Posted Jan 14, 2012 at 10:56 am
This project is based on ISD2560P IC which allows you to record 60 seconds voice and then playback it with very high quality.
Posted Jan 13, 2012 at 2:47 pm
This is an electronic fuse that protects the load against short circuit.
Posted Jan 10, 2012 at 4:23 pm
This circuit is a fan controller which is using the pulse width modulation (PWM) method. It is tiny (33.78mm x 54.76mm) and easy to build. Functions of the circuit parts are listed below;
Posted Jan 10, 2012 at 2:14 pm
In this application, we are building a gaincard like amplifier. This application type is named gainclone in the audio world. To take a satisfactory audio response, we are adding a Linkwitz equaliser to the feedback line and adding bass compensation also.
Posted Jan 10, 2012 at 12:09 pm
As shown in the schematic, temperature sensor of our electronic thermometer is LM35DZ. There are some kinds of LM35 IC, since it is cheap and easy to find we used LM35DZ in our project. It measures from 0°C to 100°C with a very linear output graph.For one degree change, it increases its output 10mV.On theElectronic Thermometer Schematic other hand, this circuit measures temperature values only between +10°C and +39°C.
Posted Jan 10, 2012 at 11:57 am
This circuit is a small stereo amplifier for all suitable applications like amplifying small speakers, boxing, etc. It is also suitable for car use but before, the power supply must be choked with at least 150mH and it must give up to approximately 6 to 7 amps during the upstream performance.
Posted Jan 10, 2012 at 11:31 am
In this project we are building a basic and low cost frequency counter circuit . It can measure from 16Hz to 100Hz signals with a maximum amplitude of 15V. The sensitivity is high, the resolution is 0.01Hz. The input signal can be a sine, a square or a triangle waveform.