# How to boost the output voltage of my 555 timer design?

I'm fairly new to the world of electronic design. I'm building an astable 555 timer with the limitation being I can only drive it with a 3v coin cell battery (design has to be lightweight). I've been experimenting with different buzzers in search of a very loud one. The buzzer I am utilizing is 3v - 7v range. I am assuming the capacitors and resistors are reducing the voltage the buzzers sees in this circuit? Is there a simple approach to boosting the voltage? Or is this a current problem? Or both? I can achieve my desired dB with double the voltage on my power supply with this circuit. Same dB level applying the voltage directly to the buzzer. Thanks!

https://imgur.com/a/4gv3pIF Ref: Jason Poel Smith, instructables.com

• No, the resistors have nothing to do with the output voltage. The only ways to boost it are to either increase the supply voltage, or use a step-up transformer on the output signal. Nov 10, 2023 at 18:15
• You can't get much out of a coin cell. Is there any chance of using two in series? Nov 10, 2023 at 18:26
• I don't know if that's what you are doing with 555, but the loudness peaks when the buzzer is driven with its resonance frequency. Ignore this comment if you are using a buzzer module instead of piezo buzzer element. Nov 10, 2023 at 18:35
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• Using a 100K resistor and a 2uF cap would waste less energy from the coin cell and perhaps let more voltage for the buzzer. Nov 10, 2023 at 20:59