Though there are many uses for these running linearly, these are typically used as "electronic switches" in a "saturated mode". Take for instance you want to to drive a device that needs more current than an Arduino can provide. You can use these as external switches to supply the current needed to drive the device (motor's, large LED's, etc.).
10-Pack Double-Sided Copper Clad Laminate PCB Circuit Boards - Perfect For DIY Prototyping!
8 Review
30-Value 300Pc 1W Zener Diode Assortment Kit (3V 3.3V 3.6V 3.9V 4.3V 4.7V 5.1V 5.6V 6.2V 6
17 Review
4PCS Breadboards Kit Include 2PCS 830 Point 2PCS 400 Point Solderless Breadboards For Proto Shield Distribution Connecting Blocks
14 Review
Douk Audio U2 PRO XMOS XU208 Digital Interface - USB To TOSLINK/Coaxial/Optical/HDMI IIS Adapter For DAC, Preamp & Amplifier | PCM & DSD256 Support
21 Review
125V Industrial Electrical Fast Blow Glass Fuses - SIXQJZML Enhanced SEO
9 Review
π Bussmann GMA 5A Acting Cartridge Listed: Reliable and Efficient Cartridge Fuse for Your Automotive Needs
7 Review
Square HOMT2020 Circuit Breaker Homeline
7 Review
π Enhance Your Electrical Work with Klein Tools 69411 Accessory Adapters
7 Review