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amc2020:group_n:sn74hc595n [2020/07/18 19:35] – jonas001amc2020:group_n:sn74hc595n [2023/01/05 14:38] (current) – external edit 127.0.0.1
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 ====== SN74HC595(N) Shift Register ====== ====== SN74HC595(N) Shift Register ======
  
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 | Operating Temperature  | -40 – 125 °C                 | | Operating Temperature  | -40 – 125 °C                 |
 | Power consumption      | 80 μA (max at 6V)            |  | Power consumption      | 80 μA (max at 6V)            | 
 +
 +Further information can be found in the {{https://www.ti.com/lit/ds/symlink/sn74hc595.pdf?ts=1595095743394&ref_url=https%253A%252F%252Fwww.google.de%252F|SN74HC595 datasheet}}.
  
 ^ **//Table 2 //** SN74HC595(N) pin overview and description  ^^^^ ^ **//Table 2 //** SN74HC595(N) pin overview and description  ^^^^
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 ===== 4.3 Combining the Sketches ===== ===== 4.3 Combining the Sketches =====
  
-This code can be combined with the code from the DHT-22 and the DS18B20s. This way the sensors are only powered when they are supposed to measure and are switched off again afterwards.+This code can be combined with the code from the DHT-22 and the DS18B20s such that the sensors are only powered when they are supposed to measure and are switched off again afterwards.
  
-The sensors and the shift register need to be connected like explained in their pages, respectively. Additionally, the VDD pin of the DHT-22 must be connected to QB of the shift register and the VDD of both DS18B20s must be connected to QC. Furthermore, if a red LED with a 330Ω resistor in series is connected to QA, it indicates when the sensors finish their measurements with a short blink.+The sensors and the shift register need to be connected like explained in their pages, respectively. Additionally, the VDD pin of the DHT-22 must be connected to QB of the shift register and the VDD of both DS18B20s must be connected to QC. Furthermore, if a red LED with a 330Ω resistor in series is connected to QA, it indicates when the sensors finish their measurements with a short blink (figure 3). 
 + 
 +^{{:amc2020:group_n:esp32_all_sensors_breadboard.png?direct&800|Figure 3}}^ 
 +|**//Figure 3//** ESP32 connected with DHT-22, DS18B20 and SN74HC595.|
  
 ==== 4.3.1 The Code combined ==== ==== 4.3.1 The Code combined ====
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 <file c++ ESP32_Sensors_Combined.ino> <file c++ ESP32_Sensors_Combined.ino>
 +//ESP32 + DHT-22 + DS18B20 + 74HC595(n) Test
 +
 +//The code in this sketch is explained in detail in the DHT-22, the DS18B20 and the SN74HC595N pages
 +//and just combines the different codes.
 +
 +/*========================================================================================================
 + * DHT-22
 + *========================================================================================================
 +*/
 +//Definitions and Pins
 +#define DHTTYPE DHT22         //define the DHT-xx sensor
 +const int DHTPIN = 15;        //define the Data Pin (GPIO 2)
 +
 +//Libraries & Objects
 +#include <DHT.h>
 +
 DHT dht(DHTPIN, DHTTYPE);     //Represents sensor DHT dht(DHTPIN, DHTTYPE);     //Represents sensor
  
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   Serial.println("Measurement is starting ...");   Serial.println("Measurement is starting ...");
   Serial.println("==============================");   Serial.println("==============================");
 +  Serial.println(delayTime);
 } }
  
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 During this test, all sensors were in equilibrium, measuring the room temperature during a rather hot summer day, and all results are close together, indicating that the sensors are working properly. During this test, all sensors were in equilibrium, measuring the room temperature during a rather hot summer day, and all results are close together, indicating that the sensors are working properly.
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amc2020/group_n/sn74hc595n.1595093715.txt.gz · Last modified: 2023/01/05 14:38 (external edit)