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the red led light
This is what older style thermostats used to turn a heater or air conditioner on or off
OLED displays are the latest in display technology which is just now starting to be introduced in flat-panel televisions
Number of LEDs: 16
10% Grey ±0
Water flow sensor (YF-S201) Buzzer 5V the red led lightIntroduction: YF S201 is a water flow measurement sensor with high grade quality sealing property. It works on the Hall effect principle and with a flow rate range of 1~30L min. The module has three pins: Power, Ground, and the Analog output. YF S201 consumes very little current and can work with an allowing pressure of 1. 75MPa. Features of YF S201 Operating Voltage: 4. 5V to 18V DC Output type: 5V TTL Maximum current draw: 15mA at 5V The sensor
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