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SimpleUSB Channel Driver
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Revision as of 02:37, 17 June 2018
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5 years ago
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Allstar denoted pins pp9 through pp12 are 'Input pins' listed as 'A#' in the parallel port scheme.
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Special note: All these pins require 'buffering' by adding a transistor to do the actual switching.
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They will not sink much current on their own.
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In the case of some older radios you might interface, you might need to buffer with a transistor (2n2222 / 3904/3906)
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AND a relay actuated by the buffer transistor. Mainly the PTT lines.
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The best design is with optically-coupled transistors to prevent voltages and/or rf from running back through this port.
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The unused output pins can be applied to switch things at the site. i.e. fan/light/alarm or even switching off other equipment.
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Check command tables for info, not related to simple_usb.conf.
[[Category:Node Configuration]]
[[Category:Node Configuration]]
KB8JNM
6
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