Low-voltage circuit breaker is what can be broken and under normal conditions of the circuit
led and so can not light The Is the base high level, N tube is generally off, low level, N tube open
the emission junction and the collector junction between the almost no current, the equivalent of 5.0V and R10 disconnected
the current flows through the LED When the GPRS high, the emission junction reverse bias, collector junction reverse bias, work in the cut-off area
which is equivalent to the collector junction and the transmitting junction connected, so that 5.0V and the transistor below the resistance R10 connected
Low-voltage circuit breaker is able to connect, carry and break the normal circuit under the conditions of the current switch
