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Amazon.com: Omabeta OP AMP Module, Single Power Supply DC 9-24V Headphone Amplifier Board PCB 2 Channel for DIY : Electronics
Juried Engineering TLE2141IP TLE2141 Excalibur Single Low Noise High-Speed Precision Single or Dual/Split Supply Operational Amplifier Op Amp Breadboard-Friendly IC DIP-8 (Pack of 2): Amazon.com: Industrial & Scientific
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