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A type of bipolar transistor comprised of p-type semiconductor in contact with n-type semiconductor which in turn is in contact with a p-type semiconductor -> thus PNP. The transistor has three terminals, the Emitter, Base and the Collector. Current injected into the base controls the flow of current from Emitter to Collector enabling amplification and switching.

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Circuit Consider the following U-Shaped Micro Photoelectric Sensor Panasonic PM-T54P with two PNP Open-Collector Transistor outputs: I chose the supply voltage to be 12V DC. In the place of …
asked Feb 1 '17 by Discbrake
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idea is a Panasonic PM-T54 (NPN Open-Collector Transistor, datasheets here and here) or a PM-T54P (PNP Open-Collector Transistor, datasheets here and here). They each require a supply voltage of \$5~V … ~DC \ldots 24~V~DC \pm 10\%\$ Can I use both the NPN- and the PNP-Type or would one of those be more suited for the NI 9401? If I understand correctly, the PNP-Type does need a sinking input (i.e …
asked Jan 31 '17 by Discbrake