This is a simple flashing led circuit with 2 leds and 2 NPN transistors. It illustrates the behavior of transistors and capacitors and if you use an oscilloscope it will be very easy to determine what ...

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 ...

[Eric] uses the oscillator to build a simple LED blinker and shows what happens when he changes the transistor and adjusts the voltage or resistance. He also shows the circuit as a tone generator ...

The tester itself is relatively simple to build ... the NPN/PNP pair causes the LED to light up, but the circuit is broken whenever one of the transistors is removed. Inserting a new transistor ...

You’re going to build two simple transistor circuits ... Part 1: Light Touch Construct the first circuit using a single transistor, an LED, a power source, and a resistance.

Ever wondered how a simple transistor can power an entire computer and run complex code? Discover the amazing world of ...

The researchers -- led by Zhenqiang ... to pattern flexible transistors -- overcoming such limitations as light diffraction, imprecision that leads to short circuits of different contacts ...

A very simple but highly efficient combination lock circuit is shown in the figure ... to be "ON" (binary state "1") to forward-bias the transistor, energize the relay (used in normally open ...