#105: More Circuit Fun: Simple 3 transistor sawtooth generator / oscillator

#104: Circuit tutorial: sawtooth generator w/ current sources, diode switches, hysteresis comparator

#87: Schmitt Trigger Oscillator / Tutorial / 74AC14 Inverter / squarewave generator

#86: Improved NTSC video to Oscilloscope converter circuit / scope video monitor hack

#83: Basics of RF Mixers in Radio Receivers / Mixer Tutorial / Frequency Conversion

#85: Basics of R2R Ladder DAC | Digital Analog Conversion, Tutorial R-2R DAC Thevenin Superposition

#82: How to use a Diode as a Switch / Diodes as Switches / Basics of Diode Switches

#77: Op Amp Peak Detector Tutorial, with peak detector basics

#79: Op Amp Power Supply Considerations: split, single, virtual ground, etc. - a tutorial

#75: Basics of Opamp circuits - a tutorial on how to understand most opamp circuits

#60: Basics of Phase Locked Loop Circuits and Frequency Synthesis

#67: Basics of Common Emitter Amplifier Gain and Frequency Response with Measurements

#110: Circuit Fun: Flexible Ramp Generator to create frequency sweeps using 555 timer and op amps

#113: Basics of Transistor bias point and the class of amplifier operation

#140: Basics of an Op Amp Summing Amplifier

#147: Basics of Varactor Diodes | Voltage Controlled Oscillator VCO Example

#219: Back to Basics: Introduction to Field Effect Transistors JFET MOSFET

#216: Back to Basics: 555 based monostable multivibrator | 555 tutorial

#215: Basics of crossover distortion | LM358 op amp example

#231: Circuit Fun: Stairstep generator using 555 and op amps

#247: Circuit Fun: 5 Transistor ESR Meter circuit by EEVBlog user Jay_Diddy_B

#235: Basics of Analog Panel Meters | Analog meter movements | D'Arsonval

#224: AM & DSB-SC Modulation with the Gilbert Cell

#223: Basics of the Gilbert Cell | Analog Multiplier | Mixer | Modulator

#207: Basics of a Cascode Amplifier and the Miller Effect

#200: T/R Switch w/ PIN Diodes and Lumped Element Quarter-wavelength transmission line

#198: Basics of a Vbe Multiplier: what it is, how it works & where it is used

#196: How a Directional Coupler in an SWR meter works

#193: Back to Basics: the differential amplifier, aka long-tailed pair, diff-pair

#190: Back to Basics: Transistor Current Sources and Mirrors

#187: Circuit Walkthrough: A single cell LED light supporting Ears to Our World

#186: Circuit Fun: Control an RC Servo with an adjustable DC voltage

#185: Back to Basics: Bipolar Transistor bias circuits and Beta dependence

#157: Circuit fun: Automatic audio leveling circuit | audio compressor | for scanning receiver

#155: Circuit Fun: Auto-ranging Analog Voltmeter for a variable power supply

#289: Back to Basics: Zener Diodes - How to Use | Applications | not all created equal

#327: Bipolar Transistor Current Mirror output impedance, Early Effect, Wilson Current Mirror

#366: Back to Basics: Basics of the Bipolar Transistor - NPN and PNP

#273: Common Emitter Amplifier Design Tips & Shortcuts

#356: Back to Basics: the Emitter Follower, or Common-Collector Amplifier

#380: Circuit Fun: Twin-Tee Oscillator - low distortion op amp sine waves

#381: Circuit Fun Followup: Trimming out distortion on Twin-Tee Oscillator - FFT &THD measurement

#392: Schematic Basics: Multi-position switches in Simpson 260 VOM and Realistic DX-160 Receiver