SNAP CIRCUITSTM - Carl's Electronic Kits
SNAP CIRCUITSTM - Carl's Electronic Kits
SNAP CIRCUITSTM - Carl's Electronic Kits
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Project #124<br />
NPN Amplifier<br />
There are three connection points on an NPN transistor, called base<br />
(marked B), emitter (marked E), and collector (marked C). When a<br />
small electric current flows from the base to the emitter, a larger<br />
(amplified) current will flow from the collector to the emitter. Build the<br />
circuit and slowly move up the adjustable resistor control. When the<br />
LED becomes bright, the lamp will also turn on and will be much<br />
brighter.<br />
Project #125<br />
PNP Amplifier<br />
The PNP transistor is similar to the NPN transistor in Project 166<br />
except that the electric currents flow in the opposite directions. When<br />
a small electric current flows from the emitter to the base, a larger<br />
(amplified) current will flow from the emitter to the collector. Build the<br />
circuit and slowly move up the adjustable resistor control. When the<br />
LED becomes bright, the lamp will also turn on and will be much<br />
brighter.<br />
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