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I am trying to drive a piezo buzzer and came up with the following circuit. Am I doing it right?

enter image description here

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    \$\begingroup\$ The part number shows a magnetic buzzer. Which is correct? Have you referred to the datasheet and any app notes? \$\endgroup\$
    – Kartman
    Jan 20, 2022 at 8:01
  • \$\begingroup\$ Where are your design specs? why 5V on a 3V buzzer \$\endgroup\$ Jan 20, 2022 at 8:04

1 Answer 1

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You show no good reason for deviating from the specs in the datasheet.

enter image description here

enter image description here

Stay within the specs. Next time please include the specs in the question.

Also, an MMBT3904 does not have hFE>200 and the diode is essential.

A better choice is a small signal diode and https://www.digikey.ca/en/products/detail/diodes-incorporated/BC847BW-7-F/1142228.

It depends how loud you need But it is rated for +/-3V or 3.0 Vp and not +5V/-1V, which might work but offset the coil from it's rated centre position or perhaps saturate the core and draw more current.

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