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.

AC mains operated single LED flasher circuit, built using the popular CMOS timer chip TLC555 is shown below. The whole circuit is powered directly by the grid supply of 230VAC through a capacitive ...

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 ...

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 ...