Resistor values for a Cascode FET amplifier, with 3.3 megaohm input impedance.

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  • piezo-balanced

    A small board that uses a LSK389B, for preamplification and impedance matching of two piezo electric crystals. It has balanced input and output.

    • At least this works just fine, I have actually built it. https://github.com/Supermagnum/piezo-balanced/blob/main/piezo-jfet.pdf It seems that the gain is somewhat dependent on the impedance of the recorder its connected to. I am getting 20 dB with 10K ohm impedance of the recorder ( simulated ).

  • double-gain

    A small PCB that uses two TL082BCP op amps to amplify a signal from a contact microphone.

    • I haven't done any analysis the cascode setup yet,- and I am unsure if I will. It's just easier to use two op amps: https://github.com/Supermagnum/double-gain/blob/main/double-gain.pdf

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

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