All posts on May, 2010
Talking Voltmeter takes a voltage measurement in the range 0-5 Volts and then reads it out to you to two decimal places (i.e. to 10mV resolution). The design illustrates the use of the 10 bit ADC in the PIC, as well as pulse width modulation (PWM) for analogue output. This project also illustrates how to squeeze every last word of program memory out of a PIC Sound samples consume almost all of the on-chip flash memory, and even that was after some pretty brutal trimming of the samples and a drop in resolution to seven bits. [more]
This simple metronome does just the trick by providing an adjustable tempo with slightly stronger first beat of each measure. Here are some features:Adjustable tempo between 60-240 BPM, Selectable 3/4 and 4/4 time , First beat of each measure is accentuated [more]
This article describes how to build a ?Space Invaders?-type game with a total component cost of just a couple of pounds. It’s compatible with 625-line/50Hz televisions that have an RGB SCART input,uses standard retro Atari-style joystick,Accurate synchronisation waveforms, including serration and equalisation ,Full colour .[more]
This project was designed and implementation of the device that converts the light collected by the phostherion into the sound of the Aurora Borealis.The conversion is done by a computer program running on a microprocessor.[more]
Without using a computer chip this analog design is still a challenging task and of course it still lacks that realistic sound created by the natural effect elements of reverbaration ,sustain and doppler effects that we love to hear at night.The 555 timer is really a poor replacement for the LM566 as a VCO (Voltage controlled oscillator ) although it is linear in function a negative voltage range is needed to activate the timer and produce the RPM to relate to the actual engine speed thus the op-amp is used to invert the track positive voltage .? [more]
