Piezoelectric Braille system with PC parallel port control and HV transistors https://tube.loping.net/videos/watch/c4dd33f5-016a-44c8-8971-20f5f383220f Here's a project that makes use of these electronic Braille characters: http://www.metec-ag.de/braille%20cell%20p16.html I built a bunch of transistor amplifiers and use two 74hc373 chips driven by the parallel port to control the state of both Braille characters. Excellent resource for PC parallel port control: http://www.beyondlogic.org/spp/parallel.htm Sun, 12 Jul 2026 14:12:40 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://tube.loping.net Piezoelectric Braille system with PC parallel port control and HV transistors https://tube.loping.net/lazy-static/avatars/8a56e488-2120-4649-a417-badf5893657b.png https://tube.loping.net/videos/watch/c4dd33f5-016a-44c8-8971-20f5f383220f All rights reserved, unless otherwise specified in the terms specified at https://tube.loping.net/about and potential licenses granted by each content's rightholder.