Electronic Design

Simple Electronic Lock Uses Single-Transistor Circuit

A very simple but highly efficient combination lock circuit is shown in the figure. Any type of on/off switches can be used, varying from commercially available inexpensive types to more sophisticated ...
EDN

Simple two-transistor circuit lights LEDs

A previous Design Idea describes a circuit that uses an astable multivibrator to drive an LED (Reference 1). The circuit in Figure 1 uses a simpler alternative approach. The circuit uses a 2N3904 NPN ...
Electronic Design

Simple Transistor Switch Detects Thermocouple Fault Conditions

Thermocouples and their leads often have to detect open-circuit or short-circuit faults. However, it is very difficult to distinguish a valid millivolt temperature signal from an open/short-circuited ...
EDN

Simple analog-centric circuits expand STEM perspectives

Looking at some anecdotal stories as well as some reasonably valid survey data, it seems that STEM-related subjects are getting serious interest from students at all age levels; STEM stands for ...
PBS

Lesson 4

In this lesson, students build two circuits and explore how transistors function. When Bell Labs introduced the transistor in June of 1948, a spokesman proudly announced "This cylindrical object . . .
Hackaday

Won’t Somebody, Please, Think Of The Transistors!

At what age did you begin learning about electronics? What was the state of the art available to you at the time and what kinds of things were you building? For each reader these answers can be wildly ...
Circuit Digest

Simple Self-Timing Electric Motor Built from Scratch

Experience low power, high security, and reliable performance with PolarFire® Core & SoC FPGAs. A maker recently demonstrated how to build a fully functional self timing electric motor using only ...