TI-89 front cover TI-89 TI-89 TI-85 magically fixed ;-) Roseate Tern Red-whiskered Bulbul Scarlet Minivet White Wagtail RGB LED Ring - V1.21 front side RGB LED Ring - V1.21 New batch of boards Knock knock Knock knock Knock knock Knock sensor + amp Knock sensor + amp Makeshift workbench Knock sensor waveforms Knock sensor waveforms Knock knock Old com system Old com system AVR recycling TI-89 backcover removed TI-85 2 dead lines :-( TI-85 TI-85 TI-89 menu TI-89 integration TI-89 sum + plot menu TI-89 function plot TI-89 info page TI-30 TI-85 shield removed TI-30 TI-89 - 'full frontal nudity' TI-89 shield removed TI-89 undressed TI-89 back cover The moon Are you talking to me ? Crappy switch Crappy switch Crappy switch Crappy switch