The AD654 is a monolithic V/F converter consisting of an input amplifier, a precision oscillator system, and a high current output stage. Its operates from a single supply of 5 V to 36 V and consumes only 2.0 mA quiescent current.
The MJE350 is a silicon planar PNP transistor intended for use in medium power linear and switching applications. It is mounted in TO-126. The complementary NPN type is MJE340.
The DC5V 2 Channels Relay Module is similar to the 4-channel version but with two relay channels. It is suitable for projects requiring the control of two separate high-power devices, providing a reliable interface between microcontrollers.
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.