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--- amc2020:group_n:sn74hc595n [2020/07/18 20:10] – [3. Technical Specifications and Setup of the Module] jonas001
+++ amc2020:group_n:sn74hc595n [2023/01/05 14:38] (current) – external edit 127.0.0.1
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 ====== SN74HC595(N) Shift Register ======
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 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 ====
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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.
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