PNP timed fade off switch is wired the same as NPN but with opposite polarity.
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- Brief NPN BJT current source controlled by trimpot voltage divider circuit
- Brief PNP BJT current source set by trimpot circuit – 2N3906 bipolar junction transistor
- Brief NPN BJT emitter follower set by trimpot using 2N3904 bipolar junction transistor
- Brief PNP BJT emitter follower common collector – 2N3906 bipolar junction transistor
- Brief zener diode component voltage reference and shunt regulator basics
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