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I will use the RPiSoC to control and catch the status of my home ventilation system. Integrate with OpenHAB and my humidity sensor, when i take my shower humidity sensor detect the humidity increase and automatically start the ventilation. I suck in electronics I'm going to need your help.
The plan
The timer
I open the current control and check component.
Its seems simple enough:
4 wire 12v, GND, LED Control, SW (Switch),
LM2901DG Chip (From spec 'Designed for use in level detection')
3 LED
Push button
100uf 63v 85°C (Capacitor)
The signal
With the Tektronix oscilloscope i check what happen in SW and LED wire.
SW wire, have continuous 5v DC and when i press control button its drope near 0v and when i release it return to 5v. When signal is reduce to 0v for about 1 second or more the main control unit detect it and start ventilation and switch between each timer state.
What is the name of this transition? Do you know some tutorial links to reproduce this with RPiSoC ?
The LED wire have his voltage between 0v to 10v. Each value indicate a state. Measure voltage between 0v to 5v with RPiSoC its seem very easy with analog port and this sample code https://github.com/EmbeditElectronics/psoc_2_pi/blob/master/API_Python_v_1_1/SAR_ADC_voltmeter.py
But how measure voltage with range 0v-10v? Use a Voltage Dividers? Do you know a good tutorial?
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