Serial.println("Switch opened"); digitalWrite(LED_PIN, LOW);// Turn the LED off} } 上传草图后,抓住磁铁,把它靠近开关。当磁铁到达干簧管1厘米的距离时,它应该触发。 代码说明 该代码比较通俗易懂。首先定义了两个常量,它们声明了干簧管和内置LED连接到的Arduino引脚。 登录后复制constintREED_PIN =2;co...
在代码中,我们必须先定义Reed开关和LED连接到Arduino的引脚。干簧管连接到Arduino的数字引脚4,LED通过限流电阻连接到Arduino的数字引脚7。变量“reed_status”用于保存干簧的状态。 int LED = 7; int reed_switch = 4; int reed_status; 复制代码 在setup()函数中,我们需要设置LED和干簧管连接的引脚状态。引脚4...
Lets first test the Reed Switch without an Arduino. Connect a LED in series with the Reed Switch to a battery. When a magnet is brought in close proximity to the contacts, the LED lights up when the nickle-iron blades inside the switch attracts each other, completing the circuit. And, w...
connect to his WiFi. The idea was simple: have the ESP8266 monitor when the mailbox flap opened using a magnet and a reed switch. As always, though, the devil is in the details. [Mike] got things working with a little help and shares not onlythe finished design but how he got ...
"Chapter 10: Reed Switches" by Kunio Hinohara in Electrical Contacts: Principles and Applications by Paul Slade (ed). Taylor & Francis, 1999, p.535ff gives full mathematical, magnetic analysis of a model reed switch.Practical projectsArduino and Raspberry Pi Sensor Projects for the Evil Genius ...
To read the Reed-switch and light the LED accordingly: const int ReedPin = 4; const int ledPin = 2; void setup() { pinMode(ledPin, OUTPUT); pinMode(ReedPin, INPUT_PULLUP); } void loop() { digitalWrite(ledPin, digitalRead(ReedPin)); } ...
# switch off for 5 seconds grovepi.digitalWrite(relay,0) print "off" time.sleep(5) except KeyboardInterrupt: grovepi.digitalWrite(relay,0) break except IOError: print "Error" 5.Run the demo. sudo python3 grove_relay.py Schematic Online Viewer ...
Before winding, the core is split in two and epoxied back together with a smallmagnetic reed switchbridging the gap. A simple 24 VDC power supply runs the whole thing. When the torch starts, the nozzle is connected to ground through the contactor, but as soon as the arc strikes and start...
Bend the legs of the reed switch in 90 degrees to fit them into the PCB with care so as not to break the protective glass. The ideal is 3 mm away from the glass. Fit each reed switch according to the diagram. Number each from 0 to 7 as the diagram. Correct identification will be...
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