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en:hardware:homelab:sensor:v5 [2010/11/26 17:25] – raivo.sellen:hardware:homelab:sensor:v5 [2020/07/20 12:00] (current) – external edit 127.0.0.1
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 ===== Electrical connections ===== ===== Electrical connections =====
  
-[{{  :examples:sensor:sensor_schematics_portf_.png?300|Controller module and Sensors module connection}}]+On-board sensors are connected as follows: 
 + 
 +^on-board notation^external notation^on-board sensor^microcontroller port^ 
 +|MIC|CON4|Microphone|PF0| 
 +|LDR|CON3|Light intensity sensor|PF1| 
 +|NTC|CON2|Temperature sensor|PF2| 
 +|POT|CON1|Potentiometer|PF3|
  
 ==== Sensors ==== ==== Sensors ====
  
-Every sensor on the board is connected through the multiplexer, enabling to select between on-board sensor or external sensor which can be connected to the same port through the connectors. By default all on-board sensors are connected to the analogous inputs of the microcontroller (ADC0-ADC3). +Every sensor on the board is connected through the multiplexer, enabling to select between on-board sensor or external sensor which can be connected to the same port through the connectors. By default all on-board sensors are connected to the analogous inputs of the microcontroller (ADC0-ADC3). Multiplexer is controller with the port PG0. 
 + 
 +[{{:examples:sensor:multiplexer_sch.png?200|Schematics of multiplexer}}]
  
-[{{  :examples:sensor:sensor_schematics_sensor .png?400  |Schematics of sensors connections}}]+[{{  :examples:sensor:sensors_sch.png?580  |Schematics of sensors connections}}]
  
 ==== Low-pass filter ==== ==== Low-pass filter ====
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 Low-pass filter can be composed between external analogous inputs 0-3 (PF0-PF3). Resistor and capacitor will be connected to the socket for building up the low-pass filter. By default a low-pass filter is composed for the channel 0 (PF0). Resistor value is 10 kΩ and capacitor value is 100 nF. Low-pass filter can be composed between external analogous inputs 0-3 (PF0-PF3). Resistor and capacitor will be connected to the socket for building up the low-pass filter. By default a low-pass filter is composed for the channel 0 (PF0). Resistor value is 10 kΩ and capacitor value is 100 nF.
  
-[{{:examples:sensor:sensor_schematics_lowpass .png ?580|Schematics of low-pass filter}}]+[{{  :examples:sensor:rc_sch.png?580  |Schematics of external sensor connections and low-pass filter}}]
  
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