Archive for June, 2008
AC Line Powered Pilot Light Circuit Schematic
By Technofreak at 24 June, 2008, 4:11 am
The Circuit Schematic On circuit analyzed today, we will analyze AC Line Powered Pilot Light circuit designed by David Johnson. Using the circuit, you don’t need a transformer to power a standard LED. As always, David Johnson makes his design simple and smart, but he doesn’t talk much about his design. Let’s discuss his design, [...]
Read More >>Using Noise Addition To Improve Measurement Precision
By Technofreak at 13 June, 2008, 8:41 am
What do you think when you read the title of this post? Normally, in any measurement, noise addition to the signal acquired from a measuring transducer is the source of imprecision, then how can I say that we can also use a noise to improve the measurement precision? Yes, we can ad a noise to [...]
Read More >>Generating Triangle Wave Using Two Square Wave Oscillator
By Technofreak at 13 June, 2008, 7:33 am
Triangle wave oscillator normally designed with a constant current source/sink to charge and discharge a capacitor. Reading an article on how to get 10 bit reading precision on 8 bit ADC on electronic design magazine today, I got something interesting on how to build a triangle wave oscillator: using two XOR-ed square wave oscillator. The [...]
Read More >>Condenser Microphone
By Technofreak at 6 June, 2008, 4:03 pm
Condenser microphone is a sound pick-up transducer. The mechanism is based on the characteristic of a capacitor. A capacitor is constructed by two conductor plates separated by a dielectric material (isolator). Air is a common dielectric used in condenser microphone. One plate will be stationary and the other plate will be vibrated by the received [...]
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