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env_sensor [2015/12/06 17:54] – [Connect a SHT15] breaker27env_sensor [2018/02/18 19:39] (current) – [Partlist (in buildup order)] breaker27
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 |    1     | PCB Generic Midi 1                      |              {{ parts:pcb_maxi_speed.jpg }}       | |    1     | PCB Generic Midi 1                      |              {{ parts:pcb_maxi_speed.jpg }}       |
 |    1     | Resistor 560R green-blue-brown          | R1          |  {{ parts:resistor_560r.jpg }}        | |    1     | Resistor 560R green-blue-brown          | R1          |  {{ parts:resistor_560r.jpg }}        |
-|    1     | Resistor 150k 0,1% brown-green-black    | R2 \\ (firmware < 0.9)    {{ parts:resistor_150k_0p1.jpg }}    | +|    1     | Resistor 150k 0,1% brown-green-black    | R2 \\ (firmware < 0.9) \\ (PCB < 1.4)    {{ parts:resistor_150k_0p1.jpg }}    | 
-|    1     | Resistor 330k 0,1% orange-orange-black  | R3 \\ (firmware < 0.9)    {{ parts:resistor_330k_0p1.jpg }}    |+|    1     | Resistor 330k 0,1% orange-orange-black  | R3 \\ (firmware < 0.9) \\ (PCB < 1.4)    {{ parts:resistor_330k_0p1.jpg }}    |
 |    1     | Resistor 1M brown-black-green           | R4          |  {{ parts:resistor_1m.jpg }}          | |    1     | Resistor 1M brown-black-green           | R4          |  {{ parts:resistor_1m.jpg }}          |
-|    1     | Resistor 100k brown-black-yellow        | R5          |  {{ parts:resistor_100k.jpg }}        |+|    1     | Resistor 100k brown-black-yellow        | R5 (for light sensor)    |  {{ parts:resistor_100k.jpg }}        |
 |    1     | Resistor 10k brown-black-orange         | R6 (for SHT15), \\ R7 + R8 (for I2C) |  {{ parts:resistor_10k.jpg }}         | |    1     | Resistor 10k brown-black-orange         | R6 (for SHT15), \\ R7 + R8 (for I2C) |  {{ parts:resistor_10k.jpg }}         |
 |    1     | Resistor 4k7 yellow-violet-red          | R9 (for 1-wire) |  {{ parts:resistor_4k7.jpg }}     | |    1     | Resistor 4k7 yellow-violet-red          | R9 (for 1-wire) |  {{ parts:resistor_4k7.jpg }}     |
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   - If you want to detect the botton / switch / pin state **immediately**, you need some sort of **permanent pull-up resistor** (assuming the button/... is connected against ground again). **Please note that the pull-up resistor only draws current if the button/... is currently active (pulling the level to low).**   - If you want to detect the botton / switch / pin state **immediately**, you need some sort of **permanent pull-up resistor** (assuming the button/... is connected against ground again). **Please note that the pull-up resistor only draws current if the button/... is currently active (pulling the level to low).**
     * If you use the internal resistor with its resistance of around 22 kOhm, it would draw about 135µA, which is a lot. This is only recommended if you power your device with a power supply (not batteries).     * If you use the internal resistor with its resistance of around 22 kOhm, it would draw about 135µA, which is a lot. This is only recommended if you power your device with a power supply (not batteries).
-    * The second option is to connect an external (physical) pull-up resistor of 1 MOhm to 10 MOhm (untested). One 1 MOhm pull-up (for one I/O pin) would draw around 3µA (at 3V battery voltage), so this is also noticeable compared to the sleep power consumption of around 1,2µA. Depending on your batteries, amount of I/O pins used as digital input and the percentage of the pin being pulled down by the button/..., you may try a risistor with a higher value like 10 MOhm.+    * The second option is to connect an external (physical) pull-up resistor of 1 MOhm to 10 MOhm. One 1 MOhm pull-up (for one I/O pin) would draw around 3µA (at 3V battery voltage), so this is also noticeable compared to the sleep power consumption of around 1,2µA. Depending on your batteries, amount of I/O pins used as digital input and the percentage of the pin being pulled down by the button/..., you may try a risistor with a higher value like 10 MOhm.
  
 ===== Connect a SHT15 ===== ===== Connect a SHT15 =====
env_sensor.1449420877.txt.gz · Last modified: 2015/12/06 17:54 by breaker27