Complementary Transistor RC Oscillator – Sine-Wave or Square-Wave Output
Learn how a complementary transistor (BC549 and BC556) RC phase-shift oscillator works, with circuit explanation and frequency calculation.
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Simple Diode Over-Temperature Indicator (LED)
Let’s experiment with a simple over-temperature indicator circuit using the 1N4148 diode as a sensor and transistors to drive an LED. Read more
CD4060 Oscillator Counter Divider – Pinout, Operation, and Example Usages
CD4060 CMOS oscillator and counter IC overview covering pinout, operation, and RC and crystal oscillator circuits for timing applications. Read more
Transistor RC Phase-Shift Oscillator – Simple Inductor-Free Sine Wave Generator
An in-depth look at a transistor-based RC phase-shift oscillator, covering how it works, the theory, and a practical example circuit. Read more
CD4011 Quad NAND Gate CMOS – Pinout, Operation, and Practical Notes
CD4011 quad NAND gate CMOS IC explained with pinout, logic operation, typical applications, and practical circuit examples for beginners. Read more