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.

Using only an ultra-bright white LED, red blinking LED, PNP transistor, and a diode, the circuit gives a strong visual indication of current consumption by blinking brighter and more frequently as ...

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 ...

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 ...