Bipolar transistors use both electrons and electron holes as charge carriers, allowing a small current injected at one of its terminals to control a much larger current flowing between two other terminals, making the device capable of amplification or switching.
Do you see the arrow on the emitter? An easy way to remember which round:
- NPN – Not Pointing iN
- PNP – Pointing iN
These are the very simplest form of the transistor, but are a great place to start, and are easy to get using. If you need help, check out our blog or contact our technical team via email for support.
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SparkfunMSRP:Now: £0.75Was:Transistor - NPN, 2N3904, Common BJT - TO-92 These are very common, high-quality BJT NPN transistors.Designed for use as general-purpose amplifiers and switches. The useful dynamic range extends to 100mA as a switch and to 100 MHz as an amplifier...MSRP:Now: £0.75Was:Qty in Cart: 0Quantity:Price:MSRP:Now: £0.75Was:Subtotal:
SparkfunMSRP:Now: £0.32Was:Transistors - NPN, BC547, Bipolar BJT - TO-92 These are high-quality BJT NPN transistors that work well with audio applications, switching and amplifying Specifications: Transistor Polarity: NPN Collector-Emitter Voltage V(br)ceo: 45V Transition...MSRP:Now: £0.32Was:Qty in Cart: 0Quantity:Price:MSRP:Now: £0.32Was:Subtotal:
Proto-PICMSRP:Now: £1.01Was:A basic NPN transistor,2N2222A 0.8A Ic 10Vce.DocumentsDataSheetMSRP:Now: £1.01Was:Qty in Cart: 0Quantity:Price:MSRP:Now: £1.01Was:Subtotal:
SparkfunMSRP:Now: £0.12Was:These are very common, high quality BJT, PNP transistors made by ST Micro. Datasheet:MSRP:Now: £0.12Was:Qty in Cart: 0Quantity:Price:MSRP:Now: £0.12Was:Subtotal: