IC Manufacturer Web sites
- Analog Devices (Op Amps, Data Converters)
- Fairchild Semiconductor
- Harris Semiconductor
- Freescale Semiconductor
- ON Semiconductor (formerly Motorola discretes)
- National Semiconductor Power Supply Application Note (PDF)
- NXP Semiconductors
- Texas Instruments
Part Sources
- Alltronics
- DC Electronics (DC Kits)
- Digi-Key
- Electronic Goldmine
- Fair Radio Sales
- Analog Devices student sample site
- Future Electronics
- Gerber Electronics
- Herbach and Rademan
- Hosfelt Electronics
- Jameco Electronics
- MCM Electronics
- Mouser Electronics
- MPJA
- Newark
- NTE Electronics
- Ocean State Electronics
- Electronix Express Surplus
- American Science Surplus
- Small Parts
- Surplus Sales of Nebraska
- Antique Electronic Supply
