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The D1 R2 also features an on-board switching power supply which allows you to power the board from a power supply up to 12V
Write Protect Pin for Hardware Data Protection
the soil meter can help guide you to getting the soil an ideal pH for your plants
3×12-bit ADC
LF351 Op-Amp IC Reflective The D1 R2 also featuresIntroduction : LF351 Op Amp IC Features : Low power consumption Output short circuit protection High slew rate 16 V us Low input bias and offset current Latch up free operation Internal Frequency Compensation Technical Specifications Voltage Supply: 18V Input Supply range: 15V Differential Input Voltage: 30V Input Offset Voltage: 3mV
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US$ 69.99