Author: abram
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Arduino: Analog Aerials
Essentially the oBITerator program with aerials instead of actual input signal. Of course, we’ve got to mix in the newly constructed PT2399 pedal. A little work needs to happen in the common-collector preamp in the delay pedal. I’ll be recalculating those values soon as well as switching out a couple of the ceramic caps. They…
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PT2399 with BJT preamp
here’s a short clip of the delay circuit that i intend to convert to a stomp box. i’m still working out the kinks in the pre-amp stage to solidify the input signal from the guitar though. just a sample though to hear how it might sound with some guitar tones. more soon.
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Arduino: the oBITerator
this was a short experiment where i wanted to see how analog AC signals from a guitar were received and converted to digital signals by the ATMEGA328. to “hear” the results along with seeing the numbers as i plucked the strings, i combined digitalWrite() and the tone() functions to output on the same pin giving…
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Eico Model 460
Eico Model 460 Oscilloscope Test from abram on Vimeo. Eico Oscilloscope 460 Manual Thanks, Daniel.
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Exoplanets…
Driving around doesn’t leave much time for making circuits, so here is an interesting graph brought to you by Space.com. Source Space.com: All about our solar system, outer space and exploration
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The Esteli: an LM386N-based cigar box amp
The Esteli: Cigar Box instrument LM386N-based Amp from abram on Vimeo. Here’s the latest in general purpose amplifiers made from reused parts. The enclosure is an old cigar box for which i have quite an affection as an enclosure. I really do love the sound of wood in both the recording process and amplifiers. In…
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fuzzy PT2399 on baritone guitar…
Here’s a loose guide that I’m using to migrate the PT2399 into stomp box world. Here’s a dry run sample with a Gretsch Baritone guitar. [audio:http://abrammorphew.com/notes/wp-content/uploads/2011/06/pt2399_guitar_delay.mp3|titles=pt2399_guitar_delay]
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Square-wave Oscillator Meets PT2399…
Square-wave Oscillator with PT2399… from abram on Vimeo. Very short video of the waveform captured using Xoscpe of the PT2399 applied to the LM386 square-wave oscillator. Sorry for the bad focusing. I was in a rush. I just needed a visual capture for later analysis. [audio:http://abrammorphew.com/notes/wp-content/uploads/2011/06/osc_delay.mp3|titles=i just broke the gameboy] …and here’s a clip of…
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LM386 Square-wave Oscillator
Here’s a small LM386-based square-wave oscillator built from the following schematic. I replaced the 30k resistor with a 50k Potentiometer from my stash of parts which then, of course, acts as a pitch controller. The following audio is some track recordings made in Ableton 8.0 with a little filter on one track and some reverb…