Build an op amp with three discrete transistors - EDN
Homemade Operational Amplifier | Hackaday.io
Simple Op-Amp | Discrete Semiconductor Circuit Projects | Electronics Textbook
PassDiy
DIY Operational Amplifier
DOA-17 Discrete OpAmp, DIY OpAmp Kit for Microphone Preamp Upgrades - FiveFish Audio
operational amplifier - I would like some feedback on my circuit design based on a DIY op-amp circuit - Electrical Engineering Stack Exchange
Op-Amp IC Tester Circuit
Electronic Diy Kit Classic Operational Amplifier Circuit Experimental Board Op Amp Parts Integrated Amplifier Training Suite - Integrated Circuits - AliExpress
Op Amp Preamplifier Circuits - For MICs, Guitars, Pick-ups, Buffers | Homemade Circuit Projects
DIY Operational Amplifier
Op-amp made from Discrete Components - Frank Milburn's Blog - Personal Blogs - element14 Community
DIY Operational Amplifier
DOA-17 Discrete OpAmp, DIY OpAmp Kit for Microphone Preamp Upgrades - FiveFish Audio
Building Soundskulptor SK25 discrete opamp API 2520 DIY audio equipment - YouTube
100+ DIY Projects based on Op-Amp Circuits - LM741 IC
NE5532 HIFI OP-AMP Amplifier Preamplifier Volume Tone EQ Control Board DIY Kits | eBay
How to Make an Opamp with Transistors (BJTs)
Build This Homemade Op-Amp and Learn How They Work - Hackster.io
PassDiy
Build This Homemade Op-Amp and Learn How They Work - Hackster.io
OP-AMP COOKBOOK — Part 1 | Nuts & Volts Magazine
An Op-Amp From The Ground Up | Hackaday
DIY Audio Projects Forum • Help! heavy oscillation occurred within my amplifier circuit
417 Build an opamp (part 7 of 7) Spice modeling the DIY op-amp - YouTube
