The NJM2068D/JRC2068D is a high performance, low noise dual operational amplifier. This amplifier features popular pin-out, superior noise performance, and superior total harmonic distortion.
The ENC28J60 Module is a standalone Ethernet controller with an industry-standard Serial Peripheral Interface (SPI™). It is designed to serve as an Ethernet network interface for any microcontroller equipped with SPI Communication Module.
The HW-040 Rotary Encoder Module is a device that generates an electrical signal based on how much the rotary input device (knob) is rotated and the direction it is rotating
The CA3130A and CA3130E are op amps that combine the advantage of both CMOS and bipolar transistors. Those are used in the input circuit to provide very-high-input impedance, very-low-input current, and exceptional speed performance.