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Merge pull request #308 from SteveAmor/master

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Corrected value of capacitor used in LightSensor
This commit is contained in:
Dave Jones
2016-05-08 11:40:13 +01:00
parent 2f41335dcd 191cda29c0
commit 39573a3093
1 changed files with 2 additions and 2 deletions
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4
gpiozero/input_devices.py
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@@ -418,7 +418,7 @@ class LightSensor(SmoothedInputDevice):
Extends :class:`SmoothedInputDevice` and represents a light dependent Extends :class:`SmoothedInputDevice` and represents a light dependent
resistor (LDR). resistor (LDR).
Connect one leg of the LDR to the 3V3 pin; connect one leg of a 1µf Connect one leg of the LDR to the 3V3 pin; connect one leg of a 1µF
capacitor to a ground pin; connect the other leg of the LDR and the other capacitor to a ground pin; connect the other leg of the LDR and the other
leg of the capacitor to the same GPIO pin. This class repeatedly discharges leg of the capacitor to the same GPIO pin. This class repeatedly discharges
the capacitor, then times the duration it takes to charge (which will vary the capacitor, then times the duration it takes to charge (which will vary
@@ -443,7 +443,7 @@ class LightSensor(SmoothedInputDevice):
:param float charge_time_limit: :param float charge_time_limit:
If the capacitor in the circuit takes longer than this length of time If the capacitor in the circuit takes longer than this length of time
to charge, it is assumed to be dark. The default (0.01 seconds) is to charge, it is assumed to be dark. The default (0.01 seconds) is
appropriate for a 0.01µf capacitor coupled with the LDR from the appropriate for a 1µF capacitor coupled with the LDR from the
`CamJam #2 EduKit`_. You may need to adjust this value for different `CamJam #2 EduKit`_. You may need to adjust this value for different
valued capacitors or LDRs. valued capacitors or LDRs.