PART FINDER FRIDAY – Small signal BJT! We’re continuing our tradition of showcasing the useful basics that everyone needs to have in their shop. Today we’ll be talking about the PN2222 (NOT to be confused with the P2N2222) NPN transistor. This is our ‘go to’ every-day NPN transistor. Its pin compatible with the the also-popular 2n3904 but with more current capability. It’s been great in the TV-B-Gone kit for pulsing the IR LEDs. You can use it to drive small motors, relays, or solenoids, audio amplification, level shifting, etc etc.
As far as small-signal transistors go, this is a good one to keep stocked up on so we suggest buying 25 or so.
All this and more in the part finder, it won’t let you down or hurt your feelings.
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Undercover in an iPhone Factory (video)
Wearables — Go with silicone
Electronics — Shift away from basic arithmetic
Biohacking — Recording and Biohacking a 100 Mile Run
No comments yet.
Sorry, the comment form is closed at this time.