changeset 82:e279a924f7a3

FC-handset-spec: update for Formike LCD modules being here
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 12 Nov 2021 20:44:41 +0000
parents 3e32484f8832
children a87d9ee278fb
files FC-handset-spec
diffstat 1 files changed, 14 insertions(+), 15 deletions(-) [+]
line wrap: on
line diff
--- a/FC-handset-spec	Fri Nov 12 18:41:41 2021 +0000
+++ b/FC-handset-spec	Fri Nov 12 20:44:41 2021 +0000
@@ -133,9 +133,9 @@
 in May-June of 2021, and it satisfies all of our requirements.  In June of 2021
 we received sample pieces, then we designed a test board for the purpose of
 evaluating this new LCD, connecting it to our Luna interface from 2020.  Our
-lunalcd2 test board was finally assembled in August, all tests passed, and as
-of September we are in process of ordering a larger batch of these finally
-chosen Formike LCD modules.
+lunalcd2 test board was finally assembled in August, all tests passed, and in
+September of 2021 we have bought 100 pcs of this finally chosen LCD module.
+This stash of 100 LCD modules is expected to be sufficient as a lifetime buy.
 
 1.4.3. Backlight and readability considerations
 
@@ -1606,18 +1606,17 @@
 3.5. LCD module and backlight
 
 The LCD module on FC Venus will be Formike KWH020ST23-F01, the same LCD module
-which we have settled on for the actual FC handset.  As of 2021-09, we are in
-the process of ordering 100 pcs of this LCD module (the payment has already been
-made, and we are waiting for the shipment to clear customs), thus we are now
-past the point of considering different candidate LCD modules.  Our chosen
-Formike LCD module is almost perfect for development boards such as FC Venus;
-the only blemish is that in the absence of additional mechanical restraints, an
-elastic force that originates somewhere in the area of the folded-under FPC tail
-pushes the bottom of the module upward, away from the PCB, acting against both
-gravity and adhesive forces.  However, we have a planned workaround: we are
-working with a local-to-us mechanical engineering company to produce a custom
-retaining bracket; with the addition of this bracket, the mounting of our LCD
-module is expected to become secure enough for development board purposes.
+which we have settled on for the actual FC handset.  In 2021-09 we made a
+lifetime buy of 100 pcs of this LCD module, thus we are now past the point of
+considering different candidate LCD modules.  Our chosen Formike LCD module is
+almost perfect for development boards such as FC Venus; the only blemish is
+that in the absence of additional mechanical restraints, an elastic force that
+originates somewhere in the area of the folded-under FPC tail pushes the bottom
+of the module upward, away from the PCB, acting against both gravity and
+adhesive forces.  However, we have a planned workaround: we are working with a
+local-to-us mechanical engineering company to produce a custom retaining
+bracket; with the addition of this bracket, the mounting of our LCD module is
+expected to become secure enough for development board purposes.
 
 The backlight circuit design of section 1.4.4.1, which is hoped to be final, is
 being included in the Venus board design.  Specific LED currents don't need to