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the phototransistor has been in a shutdown state
Ethernet Module (ENC28J60) LAN module connects directly to most microcontrollers
Interface: TXD
Hard disk drive (HDD) protection
If one half sees more or less IR radiation than the other
74HC157 (Quad 2-input Multiplexer) soil moisture the phototransistor has been inIntroduction : 74HC157 (Quad 2 input Multiplexer). 74HC1457 is a quad 2 input multiplexer. The device features select (S) and enable E inputs. A HIGH on S selects data source 1, a LOW data source 0. A HIGH on E forces all the outputs (1Y to 4Y) LOW. Inputs include clamp diodes . This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. Features ; Supply voltage : 2 6 v. Low input current : 1 mA. Temperture
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