![]() ![]() kelvinA has updated the log for Tetent.Colin on Myth Tested: DOS Can’t Multitask.Tim on Myth Tested: DOS Can’t Multitask. ![]() Dude on Weird Lens Allows Light Field Passthrough For VR Headset.Sok Puppette on Why VR As Monitor Replacement Is Likely To Be Terrible For A While Yet.Ramy on Different Etching Strokes For Different PCBs, Folks.spaceminions on No Need To Buy A Woodchipper – Build One!.Joseph Eoff on Different Etching Strokes For Different PCBs, Folks.Andrew on Why VR As Monitor Replacement Is Likely To Be Terrible For A While Yet.Phil Maitrot on Weird Lens Allows Light Field Passthrough For VR Headset.Hackaday Podcast 230: Space Science, Superconductors, Supercaps, And Central Air No comments Posted in Retrocomputing Tagged analog, audio cassette, microcassette Post navigation is not the first one to make his own cassette interface we’ve seen a somewhat more complicated analog design before, as well as one based on an FPGA. The noise it makes should bring back memories to anyone brought up with the “PRESS PLAY ON TAPE” message if it inspires you to make your own, we’re happy to report that full schematics and source code are available. The system is demonstrated by hooking it up to an Arduino Nano, which reads out the data stream at about 3000 baud. Next, he designed the interface between the computer and the tape recorder built from an op-amp and a comparator with a handful of discrete components, it filters the incoming signal and clips it to provide a clean digital signal to be read out directly by the computer. The data is encoded in the frequency range from 1 kHz to 2 kHz, which suits the bandwidth of the cassette player. designed the entire thing from the ground up: first he decided to use differential Manchester encoding, which provides immunity against common disturbances like speed variations (which cause wow and flutter). The cassette player he had available was a Pearlcorder L400, which uses the smaller microcassette instead of the familiar audio tapes used in your Walkman or boombox. While most people happily upgraded to much more reliable floppy disks, decided to go back in time and add a suitably classic storage medium to a retrocomputing project, in the form of a cassette interface. In the early 1980s cassette tapes were the standard storage medium for home computer users readers of a certain age will remember fiddling with audio jacks, tape counters and signal levels, then waiting for several minutes while a program (hopefully) loaded correctly. ![]()
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