Introduction: 555-timer Metronome

A metronome is a device that produces an audible click or other sound at a regular interval that can be set by the user, typically in beats per minute (BPM). Musicians use the device to practice playing to a regular pulse.(

In this experiment we will use a ne555 timer in which pin 3 is used to connect to the speaker to produce the tic toc sound. The potentiometer then connects to adjust the speed of the tic toc.


You will need a:

- 9 volt battery

- ne555 timer

- 8 ohm resistor

- 250k potentiometer

- 22 micro farad capacitor

-1k resistor

Step 1: Draw the Circuit.

We first should know what to connect to which.

Step 2: Construct As Such

Construction shouldn't be that hard. The 250k will be there to adjust the frequency of the tocs.


1) The first right pin of the 250k when the knob is facing you and the one after the next are connected to the positive

2) The last pin should then connect with a resistor and pin number 6 of the ne555 timer and the number 6 pin then connects to the pin 2(ne555).

3) Pin 7(ne555)is connected to pin 6(ne555) using the 250k.

4) The speaker is connected to pin 1(ne555) via the capacitor and then connects with pin 3(ne555)

5) Pin 4(ne555)then connects with 8(ne555).

Step 3: Finalizing.

You will end up with an instrument that produces a sound as such. Use the potentiometer to adjust the bpm. Use the video as a demonstration.