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– Programming Lock for Software Security
Length: 500 (mm)
The 74HC154 can be used as a 1-to-16 demultiplexer by using one of the enable inputs as the multiplexed data input
7mA max Hysteresis 10% max
It protects communication equipment from ground loops
Ammonia Gas Sensor MQ137 sim800 – Programming Lock for SoftwareThe MQ 137 is an Ammonia (NH) gas sensor . Sensitive material of MQ137 gas sensor is SnO2, which with lower conductivity in clean air. When NH3 gas exists, the sensors conductivity gets higher along with the gas concentration rising. User can convert the change of conductivity to correspond output change voltage of gas concentration through a simple circuit. MQ137 gas sensor has high sensitivity to NH3 gas, also can monitor organic amine such as
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