// Simple button cell battery holder // Created 2017 Clinton Ebadi // Released under the https://wiki.creativecommons.org/wiki/CC0 // To the extent possible under law, Clinton Ebadi has waived all // copyright and related or neighboring rights to simple button cell // battery holder. // Defaults have no tolerance, should be printed using flexible // filament for a snug fit module holder (battery_d = 20, battery_h = 3.2, case_wall = 1.7, slot_undersize = 0.4, wire_d = 1.5, cover_pct = 0.4) { battery_h = battery_h - slot_undersize; case_d = battery_d + case_wall*2; case_h = battery_h + case_wall*2; %cylinder (d= battery_d, h = battery_h, center = true); difference () { cylinder (d = case_d, h = case_h, center = true); cylinder (d= battery_d, h = battery_h, center = true); // only cover cover_pct% translate ([-case_d/2 + case_d*cover_pct, -case_d/2, -case_h/2 - 0.01]) cube ([case_d, case_d, case_h + 0.02]); // slots for wires hook_distance = -case_d/2 + case_d*cover_pct/2; // fixme: shitty name for (z = [-battery_h/2, battery_h/2]) { #translate ([-case_d/2 - 0.01, 0, z]) rotate ([0, 90, 0]) cylinder (h = case_d, d = wire_d); //#translate ([-case_d/2 - 0.01, 0, z]) rotate ([0, 90, 0]) cylinder (h = case_d * cover_pct/2, d = wire_d); } // hole to bend wire up to hold in place translate ([hook_distance, 0, 0]) cylinder (h = case_h + 1, d = wire_d, center = true); } } holder ($fs = 0.1, $fa = 1, slot_undersize = 0.4);