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Monthly Archives: October 2008
source code: io 0.0.1 beta
For the record: source code for io 0.0.1 beta [68kB zip file]. Note that this is only the io 0.0.1 beta specific files, I haven not included the auxiliary code in this archive. \ io \ \ load_io \ directory assignment and load file for io. \ \ see the file io_top for more information. [...]
Posted in construction, software Tagged construction, io 0.0.1 beta++, software, source code 1 Comment
rack wiring: 8-pin mini DIN angst
Almost completed the wiring of the rack (except the patch panel foot switch connectors which I am leaving for the moment). No problem with the XLR connectors, quarter inch phones, MIDI cables, barrel connectors… then I hit a major snag with the 8-pin mini DIN panel socket for the Mac serial connector. Too small, too [...]
Posted in construction, hardware Tagged construction, electronics, enclosures, hardware, patch panel Leave a comment
rack: loaded and powered up
Here’s the test of the power supply and the power inlet of the patch panel.
Posted in construction, hardware Tagged construction, electronics, enclosures, hardware, patch panel, power supply Leave a comment
enclosure and power supply (intermediate version)
Here’s photos of the intermediate version of the power supply in its enclosure. The front of the unit is at the top of the image, and the back is at the bottom. You’re also looking up at the the unit in these photos. Power switch and LED indicators are at the top left of the [...]
Posted in construction, hardware Tagged construction, electronics, enclosures, hardware, power supply, preamp Leave a comment
power supply (early version)
The power supply has to provide, at a minimum, 0.7A @ +12V for the VL70m (power consumption measured at 0.6A @ 13.1V), and 1.3A @ +9V for the pitch-to-MIDI converters (GI-10: 0.26A @ 10.2V; GI-20: 0.8A @ 11.3V). Eventually, it will also provide bipolar power for the pre-amplifier (±12V or ±15V likely created using a [...]
pre-amp outline
The old version of io connected the output of the synthesizer directly to the amplifier. [see: figure] This wasn’t too much of a problem since, though unbalanced, the signal was low-impedance, line-level. There were, however, a couple of less desirable aspects to this. One was that the drivers (the woofer and the tweeter) would not [...]
source code 07-03-2004