Electronic – Small electronic project kit

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I ordered this electronics project kit which consists of a small PCB. You have to solder the components onto the board.

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The components are:

  • Two 510 ohm resistors (green, brown, brown)
  • Two 33k ohm resistors (orange, orange, orange)
  • Two transistors
  • Two electrolytic capacitors
  • Two LEDs
  • Power leads red to VCC and black to ground.

After assembling the circuit here is my result. The two LEDs light up.

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The booklet does not state what the circuit is supposed to do.

Is two lit up LEDs all that the circuit is supposed to produce?

What would the schematic look for like this circuit?

Best Answer

It's almost certainly an astable multivibrator, or LED flashing circuit, which is a classical circuit and one which is often a first project.

Here's a tutorial on one.

https://www.build-electronic-circuits.com/astable-multivibrator/

Try following the tracks on the bottom of the PCB and see if you can match it to the diagram in the tutorial I linked.

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