This article is about the three buzzers toy that I made:
You can hear the buzzers in this video:
This is a simple parallel circuit. The small buzzer is connected in series with a 1 kohm resistor to prevent the 9 V battery from burning this buzzer. The big buzzer is designed for a 24 V power supply and the medium-sized buzzer is designed for a 9 V power supply.
The big buzzer oscillates. It is not ON all the time even when I am holding the button. You can see this in the video above.
I could have used a 9 V battery harness but did not have this item in stock.
Step 1: Connect the Buttons
I used old metal buttons from UK (United Kingdom) electronics kits that were produced in Israel.
All three buttons are attached with a 1.5 mm metal wire.
Step 2: Connect the Wires
I used bolts, nuts, washers, and screws to connect wires and buzzers:
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