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 ...

Peak collector current measured 155 mA using the 3-V rail. A final version of the circuit incorporated a surface-mount transistor and resistor, which occupied less space than a standard LED.

The flasher circuits below operate on a single 1.5 volt battery. LED flasher circuit diagrams The circuit on the upper uses the popular LM3909 LED flasher IC and requires only a timing capacitor and ...

Using one transistor, one resistor and one capacitor, he describes the circuit and how the components affect the frequency of the sawtooth wave the oscillator creates.

What I came up with, is the circuit above. The idea is that the constant current source – a traditional two transistor source – feeds a few mA into the capacitor all the time – so no front lamp ...

In this captivating video, discover how to create a free energy solar cell using LEDs and transistors. We guide you step by step through the process, explaining how these components can be ...

There was a time though when a flashing LED was something of a big deal, so much so that National Semiconductor produced a dedicated chip for the task. The LM3909 boasted the ability to flash an ...

Lesson 4 Using Transistors: Let’s Get Transistorized! Overview In this lesson, students build two circuits and explore how transistors function. Objectives • To observe how a transistor ...