From 263c74238768b7288fe324ca6e23e07df99a6a25 Mon Sep 17 00:00:00 2001 From: "Jan \"Yenya\" Kasprzak" Date: Thu, 13 Sep 2012 23:07:22 +0200 Subject: [PATCH] pins.txt: new notes for design --- pins.txt | 28 +++++++++++++++++++++++++--- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/pins.txt b/pins.txt index f40257f..ae2b6f6 100644 --- a/pins.txt +++ b/pins.txt @@ -31,13 +31,28 @@ LED2 - status LED ADC single-ended resolution: -0.00107 V +0.00107 V .. 1.1 V differential resolution 8x gain: -0.00013 V +0.00013 V .. 0.1375 V +differential resolution 20 gain: +0.000054 .. 0.055 V differential resolution 32x gain: -0.000036 V +0.000036 .. 0.03438 V analog input resistance 100 MOhm +LED current sense, 0.033R sensing resistor: + min gain max gain + 20 mA => 0.00066 V 8x + 100 mA => 0.0033 V + 150 mA => 0.0050 V + 300 mA => 0.0099 V + 350 mA => 0.0116 V + 700 mA => 0.0231 V + 1000 mA => 0.0330 V 32x + 1500 mA => 0.0495 V 20x 0.0495 W + 2000 mA => 0.0660 V 8x 0.066 W + 3000 mA => 0.0990 V 8x 0.1 W + Battery sense range 5-15 V 1.5M..15k @@ -55,3 +70,10 @@ lx: need probably 1-1k lux scale +Photodiode: +5 V, 1M5 resistor + photodiode: voltage at the photodiode +darkness: 3.71 V => 4.31 MOhm +bathroom without lights, only outside lights: 3.68 V => 4.18 MOhm +kitchen light: 3.29 V => 2.89 MOhm +bathroom halogen lights 0.02 V => 6 KOhm +battery light: 0.01 V => 3 KOhm -- 2.43.5