It always bothers be to connect a row of LEDs and current limiting resistors on a breadboard. Therefore, I came up with the idea of making a display module to display 8-bit buses on a breadboard. Also, sometimes it makes life a lot easier if the bus data is displayed in hexadecimal. In the end, I decided to make a 8-bit hexadecimal display that will fit on a breadboard.
In the past, I always avoided projects that require split rail power because of the extra effort needed to get that negative rail. To solve this problem, I designed a simple +5V to -5V switching converter PCB to provide a negative rail from USB. Once connected to power via USB Type-C, the right power rail of the breadboard will be +5V and the left power rail will be -5V.
A 16MB Winbond W25Q128JVSIQ flash module with PMOD interface that can be easily connected to an FPGA.
The 8-bit register breakout board shrinks the 74HC273 D-flip-flop IC and LEDs onto a PCB only a little larger than a DIP-20 package. All pins on the 74HC273 is broken out and a pull-up resistor is added to the clear pin to prevent the device resetting itself.
