• Son Luu

LAB 3904 Flasher

Updated: Sep 23, 2019


The schematic of our first lab is supposed to make a LED flashing.


What is cool about this circuit is that it includes: resistors, transistors, and capacitors that all have their own roles on our LED.




What was cool about working on this circuit is to mimicking the symmetrical set-up of the components. In fact, by following this symmetrical schematic, it actually helped the process of assembling the circuit.




Using 9V power supply:





The video shows the LED flashing:



Lessons learned:


- Start with what I think the key components are. In this case, I started with the transistors.

- Follow the (+) and (-) ends of the components and where they go on the (+) and the Ground on the breadboard.

- Identify if there is an interesting shape to the circuit and see if one could be followed. In this case, the symmetrical shape was a very good guide to begin with.

- Look up on the computer to make sure the (+) and (-) ends of more complex components such as transistors.

- Remember and train my eyes on the connected paths of a breadboard so I know to what extent and the freedom I have to work with when connecting the components (without cramping them too much). If I look closely, I typically would find that there are more alternative paths to connect the components than I thought on the board.