DIY Electronic Kit for Soil Moisture LED Light Detector
Direct purchase from the factory 
Garantuotas saugus apmokėjimas
Nemokama dovana
Pristatymo politika
Grąžinimo politikaNemokama Dovana
Sveiki atvykę į Roymall, jūsų profesionalią dovanų parduotuvę. Vertiname jūsų paramą ir norėdami parodyti dėkingumą, siūlome nemokamą dovaną su kiekvienu užsakymu.Pristatymo Politika
Prekės pristatomos per 2-5 darbo dienas. Užsakymai virš $9.9 pristatomi nemokamai.1. Grąžinimo Politika
Prekės galima grąžinti per 40 dienų. Individualios prekės negrąžinamos.2.Grąžinimo Sąlygos
Pinigai grąžinami originaliu apmokėjimo būdu.When the probe is inserted into the soil, if the soil is dry, the resistance at the two poles of the probe is very high, and the base of V1 is at the low level V1, and the LED1, LED2 and LED3 are in the off state. When the soil humidity increases gradually, the resistance at the two poles of the probe gradually decreases, and V1 begins to conduct. After the current is limited by resistor R1, the LED 1 is lit. At this time, because the circuit of LED 2 is connected with diode VD1, it needs to be driven by higher voltage. Similarly, LED3 is also connected in series. Only with the humidity gradually increasing, the number of LED lights can light up more.
Specifications:
Product name: soil moisture detector
Product size: 26*48MM
Working voltage: DC5V
Package Include:
1u00d7 Electronic Kit
uff08The delivery is in parts, which need to be assembled by the buyer.uff09
