The top pc board (two layer, "FPTT TIMER") is for a touch panel control box (based on MicroChip CTMU MCU feature). This control box is an accessory for certain Ranpak machines.
This board incorporates a USB interface for service personnel and customer setting. (A MS Windows program was written by me for use both by service personnel and by the customer.) Also, a power transistor is used for simple machines consisting of only a +24 VDC motor
The lower pc board was designed and intended to be a "Ranpak common controller" for a variety of paper dispensing machines, requiring much more electronics than the pcb shown on the home page. Per a detailed hardware specification document (a design group generated document, I was part of design group), the board provided user interface, sensor inputs, communications, and motor controller interface. Thousands of these boards have been built, and the design was extended to include additional safety interface and control features, especially for European compliance.
The primary application of these boards has been in one large table top machine (known as the "Pack Station Wrap Pack") that feeds, "coins", and cuts multiple sheets of paper.
A basic optically isolated USB interface is also included in the design for the convenience of service personnel. (Again, I created a custom "boot loader" for upgrade and customization of the operating firmware.)
The hierarchical block diagram shown simplifies understanding of each section of this pcb, and allows for repeated blocks when needed. A sample of the MCU section is shown in the lower snap.
Both of these boards are of my design, the larger one being of four layers. Note also that I designed the hardware and programming for needed test systems for the manufacture of these boards. In addition, I maintained version control as revisions were necessary during their design and development.
As mentioned with the FPSL board shown on the home page, machine firmware and machine logistics was part of my work. The boards shown on this page also were part of the evolving MS Windows software I wrote. (I also experimented with Bluetooth connectivity and Android programming, as mentioned in the home page side bar, all in my efforts to aid Service Tech's.)