Assertion: circuit board's component | /r/HasProperty | npn transistor
Facets:
value: mainly
type: DEGREE
Source sentences:
text: The electrical and electronic components of the dark detector circuit mainly include: NPN Transistor (BC548, BC147, BC547), 100K and 330Ohm resistors, LED (Light-emitting diode), LDR (Light-dependent resistor), 0.6mm diameter single-core plastic connecting wire and 9V battery.