3 Implementation

The circuitry required is dependent on the specifics of each application. The test circuit in this application used a 5V non-latching relay and a switched 5V signal divided down to make it operate similarly to a high-voltage application. Most applications will have different operating conditions. The following sub-chapters detail how to set up the circuit to work with different operating voltages. Figure 3-1 shows the reference circuit.

Figure 3-1. Schematic of the Test Circuit

A small protoboard was used to build a prototype of this circuit. Depending on the specific implementation, it may be possible to prototype using the Curiosity Development Board (DM164137) with fly-wired elements next to it. With the LPC, the amount of soldering and assembly is reduced due to the on-board programmer/debugger, USB-UART bridge, and LEDs. This implementation is available on MPLAB Discover.

Figure 3-2. Protoboard Implementation