pnp logic - SERP Analysis

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https://www.reddit.com/r/AskElectronics/comments/13zjjze/truth_table_of_npn_and_pnp_transistors/

https://www.arrow.com/en/research-and-events/articles/npn-vs-pnp-in-circuit-design-and-industrial-controls

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https://www.balluff.com/en-us/blog/npn-vs-pnp-sensing

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https://support.dewesoft.com/en/support/solutions/articles/14000123395-interfacing-npn-pnp-discrete-sensor-outputs

https://electronics.stackexchange.com/questions/14024/not-gate-with-pnp-transistor

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https://forum.digikey.com/t/applications-of-type-pnp-and-npn-sensors/36748

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https://www.instructables.com/Logic-Gates-with-NPN-transistors/

https://forum.arduino.cc/t/need-pnp-mosfet-logic-level/180101

https://www.edaboard.com/threads/standard-logic-controlling-a-pnp-transistor.163077/

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https://www.instructables.com/Dual-Logic-Transistor-Gates/

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https://www.plctalk.net/threads/npn-and-pnp-is-one-safer.107943/

https://forum.arduino.cc/t/pnp-and-npn-beginner-question/173954

https://www.quora.com/What-are-PNP-and-NPN-transistors

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https://www.geeksforgeeks.org/pnp-transistor/

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https://www.electricaltechnology.org/2020/04/pnp-transistor.html

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https://learn.adafruit.com/transistors-101/npn-and-pnp-what

https://www.plctalk.net/threads/one-more-post-about-npn-vs-pnp.111336/

https://www.quora.com/How-can-I-make-a-NAND-gate-with-only-PNP-transistors

https://eureka-patsnap-com.libproxy1.nus.edu.sg/blog/what-is-pnp-transistor/

http://www.raffaeleilardo.it/pnonp_e.htm

https://en.wikipedia.org/wiki/Bipolar_junction_transistor

https://hackaday.com/2024/07/21/all-about-pnp-transistors/

https://iopscience.iop.org/article/10.35848/1347-4065/ad2919

https://www.rcpano.net/what-is-transistor-pnp-npn/

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https://deepbluembedded.com/arduino-transistor-npn-pnp-switch-tutorial/

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https://www.jamaicaobserver.com/2025/06/12/pnp-offers-superior-policies-compared-jlp-crawford/

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https://www.amazon.com.au/Schneider-Electric-Modicon-Transistor-Controller/dp/B00ZEEVKHO

https://learn.microsoft.com/en-us/answers/tags/235/office-sp

https://www.youtube.com/watch?v=ZklK5DaIOaI

https://www.circuit-diagram.org/editor/

https://pdp.depdev.gov.ph/wp-content/uploads/2023/01/PDP-2023-2028.pdf

https://www.coursera.org/courses?query=project%20management

https://www.mdpi.com/2079-9292/14/12/2429

https://www.electronicdesign.com/technologies/analog/article/21804911/electronic-design-whats-the-difference-between-pnp-and-npn

https://everycircuit.com/

https://www.youtube.com/watch?v=XpN0IQMHo7k

https://www.geeksforgeeks.org/types-of-complexity-classes-p-np-conp-np-hard-and-np-complete/

https://cdnbbsr.s3waas.gov.in/s36832a7b24bc06775d02b7406880b93fc/uploads/2024/01/2025013051.pdf

https://www.se.com/us/en/faqs/FA111094/

https://www.wesleyanargus.com/HomePages/u107F1/2341928/napolcomentranceexamreviewer.pdf

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https://www.researchgate.net/publication/272748592_Switched_Model_Predictive_Control_for_Energy_Dispatching_of_a_Photovoltaic-Diesel-Battery_Hybrid_Power_System

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https://files.danfoss.com/download/Drives/DrivesM0013101.pdf

https://www.youtube.com/watch?v=1_O5wKtEvvI

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https://www.youtube.com/watch?v=AwRJsze_9m4

https://www.jakelectronics.com/blog/npn-vs-pnp-transistors-symbol-working-principle?srsltid=AfmBOopBB6kLZhAffoy1qRSgVWTkMS-EFmqdTCF7K6Od5ixbYBYTEtpG

https://byjus.com/physics/pnp-transistor/

https://electronoobs.com/eng_blogs.php?id=170

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