diff FC-handset-spec @ 74:e4eebf9ffce3

FC-handset-spec: Vf=2.9 V on both HaoRan and Formike LCD modules
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 16 Sep 2021 06:26:35 +0000
parents eb68975e1b81
children c458b7159fbd
line wrap: on
line diff
--- a/FC-handset-spec	Thu Sep 16 00:08:00 2021 +0000
+++ b/FC-handset-spec	Thu Sep 16 06:26:35 2021 +0000
@@ -208,9 +208,9 @@
 LCD module where the 3 LEDs are joined at the anode, with the 3 cathodes brought
 out separately.  LCD module datasheets call for 15 mA current through each LED
 at maximum intensity, for 45 mA total, and the LED forward drop voltage (Vf) at
-this rated current seems to range between 2.9 V (what I actually measured on one
-candidate LCD module) to 3.2 V (what the datasheets list as typical) to perhaps
-as high as 3.4 V (what one datasheet lists as the maximum).
+this rated current seems to range between 2.9 V (what I actually measured on
+both Formike and HaoRan LCD modules) to 3.2 V (what the datasheets list as
+typical) to perhaps as high as 3.4 V (what one datasheet lists as the maximum).
 
 Given the parallel (as opposed to series) wiring of the 3 LEDs and the
 relatively low Vf, there is no need to use any kind of boost converter as part