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OpAmp Breakout

**Replacement: **BOB-09816. This is an older version of the Op Amp breakout board, shown here for historical purposes. The new version uses a surface mount potentiometer for gain adjustments instead of the larger, through-hole component.

This is a simple Op Amp breakout board, set up as a 2-stage amplifier with a gain of 100 (gain of 10 for each stage). The on-board trim pot sets the signal level between the stages, not the feedback path. The bandwidth is set to 15.9kHz by a pair of feedback capacitors, or over 100kHz with the caps removed. The LMV358 opamp can source up to 160mA and works well as a low impedance driver/buffer.

Comments

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  • Oops! There is a 10k on the input. Additionally, jumper C5 and C6 to work woth DC.

  • Jumper that input cap so it will work with DC; maybe a solder pad jumper. I'd like to see a neg voltage on the op-amp so it could be used for null or used for offsetting the input. Maybe a current limiting res on the input too. Thanks.

    • Could you explain this for me? How do I make this work with DC? I 'bridge' or jumper the input terminal....but connect it to what exactly? Thanks

  • @ aws
    I'm a noob, how can you tell from the schematic that it is AC?

  • Note that it only passes AC signals (see schematic)

  • The 3 thru-holes visible on the bottom right of the board appear to be for the pot (schematic R7).

  • what do the pins on the bottom go to?

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