My previous instructable dealt with using the indispensable NE555 Timer IC in an Astable configuration. In this instructable we will also make an astable multivibrator, just without the IC but with 2 transistors.
Step 1: View the Video!!!
View the video!
Step 2: Get the Parts!
I know, I've entitled the step as "get the parts" although most of the parts required for the projects are general purpose, so you'll probably have them laying around like I did. The list is below:
- 2x 470 Ohm Resistors
- 2x 47K Ohm Resistors
- 2x 10 Microfarad Electrolytic Capacitors
- 2x 2N2222A NPN BJT Transistors
- 2x LEDs
- 2x Hands
- Power Source (I'm using 5 volts)
Step 3: Schematic
I've included the schematic in the pictures. It came from build-electronic-circuits.com.
Step 4: Make It!
Now that you have everything ready you can make the circuit. Simply follow me in the video, or if you prefer, download the schematic and use that.
Step 5: Final Comments
You did it! The project is dead simple and cheap. It's ideal for a beginner to get used to the feel of transistors.