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Content 4/4

This is a HEX CMOS inverter based voltage multiplier. It is used for condenser microphone biasing. It takes 12VDC in and turns it into up to 80VDC. For 60VDC, omit the last capacitor C3. The Hex Inverter needs to run off off 12 Volts or above. And it needs to be a schmitt trigger type. The schematic has a MC33761 shown in it, that is not required and can be bypassed. Also the trim pot is jumpered as well. You can use these if needed for other voltages. I did not. Here is the build video for microphones

using this:

Bill of materials used in this project

757-TC4584BFELNF
1
512-1N4148
8
594-K103K15X7RH53L2
6
594-K104M20X7RH53L2
2
667-ECE-A1VKS4R7
1
594-K102J20C0GH5TH5
1
660-MFS1/4DCT52A1002
1
660-MF1/4DCT52A1004F
2
Jan 30,2021
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    • twt2008 from
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    • Joseph Doll from UNITED STATES OF AMERICA
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